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Searchable database of UPR’s patent portfolio:

patent portfolio V2

patent numberpatent titleabstractinventorassigneePDF date of patenttechnology
US 8622166SWITCH-ACTUATED JOYSTICK FOR POWER WHEELCHAIRSThe present invention provides a universal single sWitch driving system for poWer Wheelchairs, Which can be attached to any Wheelchair joystick and remotely controlled, by any single sWitch available for persons With disabilities.Raul Edmir Torres-MunizUniversity of Puerto Rico San JuanPDF PatentJan. 7, 2014biotechnology
US 8440973Bimorph cantilever arrangement and applications thereofThe invention utilizes the changes in physical properties of materials during a solid-solid phase transition in order to enhance the sensitivity of cantilever IR detectors. The substantial changes in properties during insulator-to-metal transitions (IMTs) of some materials are useful for controlling purposes according to the invention. A cantilever arrangement is provided with a cantilever being coated with an insulator-to-metal transitions (IMTs) material. Bending of the cantilever is achieved when the temperature of the (IMTs) material is within its phase transition temperature range.Felix E Fernandez , Nelson Sepulveda-AlancastroUniversity of Puerto Rico San JuanPDF PatentMay 14, 2013mechanical and materials engineering
US 8440166Method of synthesizing a novel absorbent titanosilicate materialA titanium silicate variant named UPRM-5 was prepared using tetraethylammonium hydroxide as a structure-directing agent (SDA). Successful detemplation was achieved via ion exchange with NH4Cl. Effective functionalization was obtained after ion exchanging the detemplated material using SrCl2 and BaCl2. Adsorption of CO2 at 25° C. in Sr- and Ba-UPRM-5 materials activated at different temperatures. For low partial pressures, the observed CO2 adsorption capacities increased as follows: NH4-UPRM-5Arturo Hernandez Maldonado , Jose N Primera PedrozoUniversity of Puerto Rico MayagüezPDF PatentMay 14, 2013Chemical engineering
US 8268628Method for determination of protein, peptide or peptoid aggregation, stability, and viability and system using the sameThe invention describes a method for determining aggregation in protein, peptide or peptoid formulation, without the use of probes or additives. The method uses FTIR spectroscopy combined with the two-dimensional correlation analysis (2DCOS) which allows for the determination of the presence of aggregates, the determination of the mechanism of aggregation, allowing for correction in the pipeline manufacturing process of the protein to once again generate viable protein. Belinda Pastrana Rios University of Puerto Rico San JuanPDF PatentSept. 18, 2012Chemical
US 8101783Titanium-maltol compound and method of synthesizing the sameA novel compound showing anti-tumor properties was synthesized by reacting Cp2TiCl2 with maltol (3-hydroxy-2-methyl-4-pyrone) and a pH of 5.4, leading to a complete replacement of Cp and chloride ligands affording, Ti(maltolato)2(OH)2. The further crystallization of Ti(maltolato)2(OH)2 at pH of 8.4 leads to the formation of the novel anti-tumor compound [Ti4(maltolato)8(μ-O4)]Enrique Meléndez University of Puerto Rico San JuanPDF PatentJan 24, 2012Chemical- Organic Compounds
US 8323528Phosphorescent compositions, methods of making the compositions, and methods of using the compositionsCompositions, methods of making compositions, materials including compositions, crayons including compositions, paint including compositions, ink including compositions, waxes including compositions, polymers including compositions, vesicles including the compositions, methods of making each, and the like are disclosed.Weiyi Jia University of Puerto Rico MayagüezPDF PatentDec. 4, 2012Physics- Compositions
US 8185982Integrated showering and body support systemA bathing chair which has a water-spraying function for simultaneously effecting a shower discharge from each of a plurality of shower discharge ends and thus assist a person with severe disabilities while cleansing him or herself or while being assisted by a third person. The bathing chair including strategically located nozzles to wash critical body parts, a main control system with manual and electro-mechanical operated valves, two main flow paths with independent control systems, means for combining a soap product and water, a water temperature sensor, and a pump/reservoir system for water pressure adjustment.David Serrano University of Puerto Rico San JuanPDF PatentMay. 29, 2012Mechanical- Shower Body Support
US 8104358High sensitivity passive wireless strain sensorA high sensitivity strain sensor that utilizes a micro-scale cavity built in a multi-layer structure, with a pair of interdigitalized capacitor incorporated on one of the layers, is described in this document. The device's capacitance changes produced by unattended deformations of the cavity can be used to measure the associated strain without using any movable electrodes. The sensor can be remotely energized from a radio frequency wave sent by a reader antenna to construct a battery-free wireless instrument. Changes on the sensor's resonant frequency are remotely detected so that a strain level is measured from fluctuations in the received signal. This detection method provides a simple, reliable and sensitive technique to measure small strain changes down to the pico-scale. Materials with a highly strain-dependant permittivity are integrated in the sensor to enhance its sensitivity. The proposed sensor consists of a simple planar structure. It can be used as the main component on low-cost, accurate and highly stable strain measuring instruments capable of monitoring very small strain levels. Furthermore, the sensor is passive, may be operated wirelessly, and can, thus, be used for remote long-term embedded strain detection.Yi Jia University of Puerto Rico San JuanPDF PatentJan. 31, 2012Electrical Systems and Devices
US 7876247Signal dependent ditherA new technique on the dithering of one-dimensional signals is presented. The novel technique determines whether dither is needed when reducing the bit depth and evaluates whether the total error of the un-dithered quantization is white noise. If this is the case, then no undesired harmonics are added in the quantization or re-quantization process. The novel technique presents a state of the art signal-dependent dither having a lower quantization noise.Shawn HuntUniversity of Puerto Rico MayagüezPDF PatentJan. 25, 2011Image Analysis
US 7427654Degradable polymidesDegradable polyimides are prepared in high yield by polymerizing a monomer containing at least two anhydride groups, and a monomer containing at least two primary amine groups and at least one acidic group, in bulk or in a solvent. The polyimides are very strong in terms of their mechanical properties, yet degradable under standard physiological conditions.Carlos RamirezUniversity of Puerto Rico San JuanPDF PatentSep. 23, 2008Synthetic Resins- Polymer
US 6644137Sample probeA sampling probe includes a housing, a cover and a guide. The housing defines a trough having an opening, at least a portion of the opening being in an insertion direction of the probe. The cover is axially movable with respect to the housing between an open position in which a substance is allowed to pass into the trough and a closed position in which the cover covers the opening to retain a predetermined volume of the substance in the trough. The cover is flexible. The guide is configured to guide axial movement of the cover between the open and closed positions. The guide is configured to direct the cover in a curved path.Michael BellamyUniversity of Puerto Rico San JuanPDF PatentNov. 11, 2003Measuring and Testing
US 6608205Organic crystalline films for optical applications and related methods of fabricationThe present invention provides organic single crystal films of less than 20 μm, and devices and methods of making such films. The crystal films are useful in electro-optical applications and can be provided as part of an electro-optical device which provides strength, durability, and relative ease of manipulation of the mono-crystalline films during and after crystal growth.Alexander LeydermanUniversity of Puerto Rico San JuanPDF PatentAug. 19, 2003Organic Compounds
US 6539738Compact solar-powered air conditioning systemsA design of a compact solar air conditioning system especially suited for tropical climates includes an air-cooled single-effect absorption machine driven by an array of high performance flat-plate collectors along with a thermal storage tank. The absorption machine uses lithium-bromide as a refrigerant and a water-based absorption fluid. The operation of the compact solar air conditioning system is determined by an optimal control strategy.Jorge GonzalezUniversity of Puerto Rico San JuanPDF PatentApr. 1, 2003Refrigeration-Mechanical and Electrical
US 6536677Automation and control of solar air conditioning systemsA solar powered air conditioning system includes an absorption machine coupled to three primary loops. A heat loop provides energy to the absorption machine. A cooling tower loop exhausts heat from the absorption machine. A chilled water loop is used to draw heat from a room or building. The heat loop provides energy from a boiler and/or from a number of solar collectors. In one mode of operation, the solar collectors circulate through a storage tank. The flow through the solar collectors is regulated to maximize energy collection.Jorge GonzalezUniversity of Puerto Rico San JuanPDF PatentMar. 25, 2003Physical Processes- Mechanical
US 6534134Apparatus and method for pulsed laser deposition of materials on wires and pipesMethods and apparatuses are disclosed which allow uniform coatings to be applied by pulsed laser deposition (PLD) on inner and outer surfaces of cylindrical objects, such as rods, pipes, tubes, and wires. The use of PLD makes this technique particularly suitable for complex multicomponent materials, such as superconducting ceramics. Rigid objects of any length, i.e., pipes up to a few meters, and with diameters from less than 1 centimeter to over 10 centimeters can be coated using this technique. Further, deposition is effected simultaneously onto an annular region of the pipe wall. This particular arrangement simplifies the apparatus, reduces film uniformity control difficulties, and can result in faster operation cycles. In addition, flexible wires of any length can be continuously coated using the disclosed invention.Felix FernandezUniversity of Puerto Rico San JuanPDF PatentMar. 18, 2003Coating Process
US 6533304Mechanically assisted standing wheelchairThe present invention provides a hydraulic powered wheelchair pivotable from a sitting position to a standing position with minimal user effort. The pivoting frame assembly includes a rigid horizontally arranged wheel support structure, a single vertical extending member secured to the wheel support structure and centered between the wheels, and a pivoting frame linkage assembly pivotably connected at the upper end of the vertically extending member. A hydraulic jack rests on the wheel support structurs, and is connected at the other end to the seat support members of the pivoting assembly. A user of the wheelchair pivots a lever assembly to raise the jack, and thus raise the chair to the standing position. An electric buzzer system is integrated with the wheelchair, and an alarm informs the operator when the chair has reached the standing position.David SerranoUniversity of Puerto Rico San JuanPDF PatentMar. 18, 2003Vehicles for use by a seated disabled occupant.
US 6267911Brightness; used in jewelry and related items for ornamentation or apparel, optoelectronic technology such as image storage and memory devicesThis invention relates to phosphors including long-persistence green phosphors. Phosphors of the invention are represented by the general formula:
MkAl2O4:2xEu2+,2yR3+
wherein k−1-2x-2y, x is a number ranging from about 0.0001 to about 0.05, y is a number ranging from about x to about 3x, M is an alkaline earth metal, and R3+ is one or more trivalent metal ions. Phosphors of this invention include powders, ceramics, single crystals and single crystal fibers. A method of manufacturing improved phosphors and a method of manufacturing single crystal phosphors are also provided.
Weiyi JiaUniversity of Puerto Rico San JuanPDF PatentJul. 31, 2001Inorganic Luminiscent Compositions
US 6227981Ball ramp assemblyhe present invention contemplates an improved ball ramp assembly that enables even the most severely handicapped bowler to guide and accelerate a bowling ball toward the intended bowling pins. The bowling ramp assembly includes a ramp having a ball guide defining a ball path along the ramp, a base coupled to a proximal end of the ramp for supporting the ramp, a ball release coupled to the ramp for selectively controlling travel of the ball along the ramp, and a positioning assembly coupled to the ramp for adjusting the orientation of the ramp. The ball release includes a ball stopping member that moves between a ball blocking position and a ball releasing position. The positioning assembly includes at least one motor coupled to the ramp and a wheel located at the distal end of the ramp. The ball release and positioning assembly are both controlled by switches which may be located remotely from the ramp.David SerranoUniversity of Puerto Rico San JuanPDF PatentMay 8, 2001Apparatus for aiding the bowler who is physically impaired
US 6198530Organic crystalline films for optical applications and related methods of fabricationA method for forming an optical device includes the steps of providing a first plate having a first face defining a recess, filling the recess with a material which can be crystallized, and covering the first face and the recess with a second plate having a second face, so that the second face is in contact with the first face and the material in the recess is completely enclosed by the first and second plates. The material in the recess is thereby protected from chemical and mechanical damage, as well as evaporation. In addition, the plates can be transparent, allowing the material in the recess to be visually monitored. A grown crystalline film packed in the cell can be used as a non-liner and/or electro-optical device.Alexander LeydermanUniversity of Puerto Rico San JuanPDF PatentMar. 6, 2001Optics: Measuring and Testing
US 6171198Merry-go-round for wheel chairsA merry-go-round with a frame supported for rotation by a plurality of driven wheels, the merry-go-round having a space for a wheel chair and a space for a non-wheel chair bound person. Each separate space on the merry-go-round is associated with a respective crank assembly such that a person in that space can drive one of the driven wheels through a crank. A plurality of smaller wheels secured to the underside of the frame provide additional support for the merry-go-round. The person in the non-wheel chair bound space can stand on the frame, or in an alternate embodiment can sit on a chair. Because the merry-go-round has spaces for both wheel chairs and non-wheel chair bound people, both can use the merry-go-round at the same time.David SerranoUniversity of Puerto Rico San JuanPDF PatentJan. 9, 2001Mechanical Structures-Wheel Chairs
US 6170202Building system using shape memory alloy membersA system and method is described by which the structural integrity of a building or other structure can be increased and made more resistant to earthquake damage. A structural member may be incorporated into a building structure. At least a portion of the structural member is made of a material that undergoes a shape or phase transformation in response to energy applied. This member can alter the natural frequency of the building structure from a first natural frequency to a second natural frequency when the material undergoes the transformation to make destructive resonance less likely to occur.Frederick JustUniversity of Puerto Rico San JuanPDF PatentJan. 9, 2001Static Structures
US 6117362Long-persistence blue phosphorsThis invention relates to phosphors including long-persistence blue phosphors. Phosphors of the invention are represented by the general formula:
MO . mAl2 O3 :Eu2+,R3+
wherein m is a number ranging from about 1.6 to about 2.2, M is Sr or a combination of Sr with Ca and Ba or both, R3+ is a trivalent metal ion or trivalent Bi or a mixture of these trivalent ions, Eu2+ is present at a level up to about 5 mol % of M, and R3+ is present at a level up to about 5 mol % of M. Phosphors of this invention include powders, ceramics, single crystals and single crystal fibers. A method of manufacturing improved phosphors and a method of manufacturing single crystal phosphors are also provided.
Weiyi JiaUniversity of Puerto Rico San JuanPDF PatentSep. 12, 2000Inorganic Luminiscent Compositions
US5746823Organic crystalline films for optical applications and related methods of fabricationA method for forming an optical device includes the steps of providing a first plate having a first face defining a recess, filling the recess with a material which can be crystallized, and covering the first face and the recess with a second plate having a second face, so that the second face is in contact with the first face and the material in the recess is completely enclosed by the first and second plates. The material in the recess is thereby protected from chemical and mechanical damage, as well as evaporation. In addition, the plates can be transparent, allowing the material in the recess to be visually monitored. A grown crystalline film packed in the cell can be used as a non-liner and/or electro-optical device.Alexander LeydermanUniversity of Puerto Rico San JuanPDF PatentMay 5, 1998Organic Compound
US 5557471Lens for depositing target material on a substrateA method of depositing a thin layer of a target material on a substrate is disclosed. The method comprises illuminating the material with at least one elliptical laser beam so that a desposition plume is emitted from the target material, then positioning the substrate to receive the material emitted by the deposition plume. An apparatus for practicing the method and a multi-faceted negative axicon for forming a plurality of concentric laser beams are also disclosed.Felix FernandezUniversity of Puerto Rico San JuanPDF PatentSep. 17, 1996Optical: Lens shades
US 5475228Unipolar blocking method and apparatus for monitoring electrically charged particlesAn apparatus for monitoring an electrically charged particle pulse includes at least one coil defining an opening therethrough. The coil generates a bipolar signal responsive to the electrically charged particle pulse passing through the opening, and the bipolar signal comprises a first portion having a first polarity and a second portion having a second polarity. Unipolar blocking diode connected to the coil passes the first portion of the bipolar signal having a first polarity and blocks the second portion of the bipolar signal having the second polarity. Monitoring Device connected to the unipolar blocking diode generates an output signal representative of a predetermined characteristic of the particle based upon the first portion of the bipolar signal which is passed by the unipolar blocking diode. In a preferred embodiment, the coil has a toroidal shape and comprises a plurality of windings electrically connected in parallel, and each of these windings comprises a plurality of conductive loops. The apparatus may also comprise a series of coils arranged so as to define a predetermined path for passage of the electrically charged particle through each respective opening of each respective coil.Jose PalathingalUniversity of Puerto Rico San JuanPDF PatentDec. 12, 1995Electricity: Measuring and Testing
US 5468500Soursop flavorA natural tasting soursop flavoring composition prepared by combining methyl butanoate, methyl 2-butenoate, butanoic acid, methyl hexanoate, methyl 2-hexenoate, hexanoic acid and linalool.Manuel RodriguezUniversity of Puerto Rico San JuanPDF PatentNov. 21, 1995Drug, Bio Affecting and body treating Compositions
US 5405659Illumination of target material by elliptical ring-shaped laser beam to form pattern, a deposition plume is emitted from pattern formed on target, positioning substrate to receive target material emitted from plumeMethod and apparatus for depositing a thin layer of a target material onto a substrate by illuminating the target material with at least one ring-shaped elliptical laser beam so that a ring-shaped deposition plume is emitted from the target material, and positioning the substrate to receive the emitted material. Concentric, ring-shaped elliptical laser beams are formed by use of a multi-faceted negative axicon.Felix FernandezUniversity of Puerto Rico San JuanPDF PatentApr. 11, 1995Coating Processes:Laser or electron beam
US 5274689Tunable gamma ray sourceA source of gamma rays (a photon beam) at a single energy produced by the single-quantum annihilation of accelerated positrons with electrons of a target element. The photons are emitted predominantly in the forward direction and are accompanied by background radiation which can be differentially suppressed. The energy of the photons is determined by varying the energy of incident positrons. The photon beam is usable in materials research and analysis, medical diagnosis and therapy, and numerous other fields.Jose PalathingalUniversity of Puerto Rico San JuanPDF PatentDec. 28, 1993X-RAY or GAMMA RAY Systems or Devices
PDF list of UPR’s patent portfolio:
portafolio de patentes UPR 2013