Patents Assigned to Rensselaer Polytechnic Institute
  • Patent number: 9822204
    Abstract: The present invention includes vinyl ether functional oligomers and methods for their preparation, the method including alternating free radical copolymerization of a dialkyl maleate or dialkyl fumerate monomer with a multifunctional vinyl ether monomer in the presence of a solvent with a high chain transfer constant. Also within the scope of the invention are uses for the vinyl ether functional oligomers compositions of this invention, including radiation curable coatings, adhesives, printing inks and composites.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: November 21, 2017
    Assignee: RENSSELAER POLYTECHNIC INSTITUTE
    Inventor: James V. Crivello
  • Patent number: 9810794
    Abstract: Methods for fabricating radiation-detecting structures are presented. The methods include, for instance: fabricating a radiation-detecting structure, the fabricating including: providing a semiconductor substrate, the semiconductor substrate having a plurality of cavities extending into the semiconductor substrate from a surface thereof; and electrophoretically depositing radiation-detecting particles of a radiation-detecting material into the plurality of cavities extending into the semiconductor substrate, where the electrophoretically depositing fills the plurality of cavities with the radiation-detecting particles. In one embodiment, the providing can include electrochemically etching the semiconductor substrate to form the plurality of cavities extending into the semiconductor substrate.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: November 7, 2017
    Assignee: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Rajendra P. Dahal, Ishwara B. Bhat, Yaron Danon, James Jian-Qiang Lu
  • Patent number: 9801600
    Abstract: Systems and methods for X-ray phase-contrast imaging (PCI) are provided. A quasi-periodic phase grating can be positioned between an object being imaged and a detector. An analyzer grating can be disposed between the phase grating and the detector. Second-order approximation models for X-ray phase retrieval using paraxial Fresnel-Kirchhoff diffraction theory are also provided. An iterative method can be used to reconstruct a phase-contrast image or a dark-field image.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: October 31, 2017
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Ge Wang, Yan Xi, Wenxiang Cong
  • Patent number: 9773953
    Abstract: Provided is a phosphor-functionalized nanoparticle that includes an inorganic nanoparticle core; surface polymer brushes that include a plurality of long-chain polymers bonded to the surface of the inorganic nanoparticle core, said long-chain polymers each having molecular weight greater than 500, and a plurality of short-chain polymers bonded to the surface of the inorganic nanoparticle core, said short-chain polymers each having molecular weight less than 0.5 times the average molecular weight of the long-chain polymers; and one or more organic phosphors bonded to at least one of the inorganic nanoparticle core and one or more of the plurality of short-chain polymers. Graft density of the short-chain polymers on the surface of the inorganic nanoparticle core (?SC) is greater than graft density of the long-chain polymers on the surface of the inorganic nanoparticle core (?LC). Also provided are polymer matrices, LED's, optical systems, lighting devices, and fixtures that include the inventive nanoparticle.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: September 26, 2017
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Ying Li, Peng Tao, Linda S. Schadler, Robert F. Karlicek, Jr., Richard W. Siegel, Lei Wang, Brian C. Benicewicz
  • Publication number: 20170253843
    Abstract: Cell culture devices, and related methods and kits, for modeling isotropic-to-anisotropic cellular transitions are provided. The devices can include a substrate having an isotropic film surface with one or more regions of aligned fibers dispersed thereon.
    Type: Application
    Filed: August 25, 2015
    Publication date: September 7, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: CHRISTOPHER JOHN RIVET, GREGORY PATRICK DESMOND, JONATHAN MICHAEL ZUIDEMA, RYAN JAMES GILBERT
  • Patent number: 9746142
    Abstract: A light fixture includes a light source, a wavelength-conversion material, and a reflector. The light source is configured to emit a first radiation, and has a front surface and a back surface. The wavelength-conversion material is arranged under the front surface and configured to convert the first radiation to a second radiation which has a first portion not able to reach the reflector and a second portion able to reach the reflector. The reflector is arranged over the back surface and configured to reflect the second portion away from the light source without passing through the wavelength-conversion material. The reflector has an end distant from the light source and is arranged in an elevation different from that of the wavelength-conversion material.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: August 29, 2017
    Assignee: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Nadarajah Narendran, Yimin Gu, Jean Paul Freyssinier, Yiting Zhu
  • Publication number: 20170245339
    Abstract: Light-emitting diode (LED) driver systems that are scalable and can be used for N-color LED systems are provided. An LED system having N LED strings of different color can be efficiently driven with independently controllable constant current sources for each string from a single power source. The driver system can include a power converter having an inductor.
    Type: Application
    Filed: September 4, 2015
    Publication date: August 24, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Kumar Modepalli, Leila Parsa
  • Patent number: 9730657
    Abstract: Imaging methods and imaging systems are provided. Methods and systems of the subject invention can include linearly translating a source and a detector. The source and the detector can be moved in opposite or approximately opposite directions. Acquired data can be used to reconstruct a tomographic image by using, for example, a compressive sensing technique.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: August 15, 2017
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Ge Wang, Fenglin Liu, Wenxiang Cong, Hengyong Yu
  • Patent number: 9732427
    Abstract: The invention is directed to a composite polymer/nanoporous film system and methods of fabrication of tunable nanoporous coatings on flexible polymer substrates. The porosity of the nanoporous film can be tuned during fabrication to a desired value by adjusting the deposition conditions. Experiments show that SiO2 coatings with tunable porosity fabricated by oblique-angle electron beam deposition can be deposited on polymer substrates. These conformable coatings have many applications, including in the field of optics where the ability to fabricate tunable refractive index coatings on a variety of materials and shapes is of great importance.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: August 15, 2017
    Assignee: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: David J. Poxson, Frank W. Mont, E. Fred Schubert, Richard W. Siegel
  • Publication number: 20170217977
    Abstract: 8-Substituted-2,6-methano-3-benzazocines of general structure I in which A is —CH2—OH, —CH2NH2, —NHSO2CH3, and Y is O, S or NOH are useful as analgesics, anti-diarrheal agents, anticonvulsants, antitussives and anti-addiction medications. 8-Carboxamides, thiocarboxamides, hydroxyamidines and formamides are preferred.
    Type: Application
    Filed: September 9, 2016
    Publication date: August 3, 2017
    Applicant: Rensselaer Polytechnic Institute
    Inventor: Mark P. WENTLAND
  • Patent number: 9722154
    Abstract: A method of manufacturing a down-conversion substrate for use in a light system includes forming a first crystallography layer including one or more phosphor materials and, optionally, applying at least one activator to the crystallography layer, heating the crystallography layer at high temperature to promote crystal growth in the crystallography layer, and drawing out the crystallography layer and allowing the crystallography layer to cool to form the down-conversion substrate. A light system includes an excitation source for emitting short wavelength primary emissions; and a down-conversion substrate disposed in the path of at least some of the primary emissions from the excitation source to convert at least a portion of the primary emissions into longer-wavelength secondary emissions, wherein the substrate includes one or more crystallography layers, wherein each crystallography layer includes one or more phosphor materials, and optionally at least one activator.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: August 1, 2017
    Assignee: Rensselaer Polytechnic Institute
    Inventor: Partha S. Dutta
  • Publication number: 20170213534
    Abstract: Systems and methods capable of providing adaptive and responsive accompaniment to music with fixed chord progressions, such as jazz and pop, are provided. A system can include one or more sound-capturing devices, a signal analyzer to analyze captured sound signals, and an electronic sound-producing component that produces electronic sounds as an accompaniment.
    Type: Application
    Filed: July 10, 2015
    Publication date: July 27, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Jonas Braasch, Nikhil Deshpande, Pauline Oliveros, Selmer Bringsjord
  • Publication number: 20170207493
    Abstract: A lithium-based energy storage system includes an electrolyte and an electrode. The electrode has a conformal coating of parylene. The parylene forms an artificial solid electrolyte interface (SEI). The electrode may include a material chosen from silicon, graphene-silicon composite, carbon-sulfur, and lithium. The use of parylene to form a conformal coating on an electrode in a lithium-based energy storage system is also disclosed.
    Type: Application
    Filed: July 29, 2015
    Publication date: July 20, 2017
    Applicant: Rensselaer Polytechnic Institute
    Inventors: Rahul Mukherjee, Eklavya Singh, Nikhil Koratkar, Toh-Ming Lu
  • Publication number: 20170198093
    Abstract: The invention is directed to processes for preparation of oxetane polymers, wherein an epoxide accelerant is reacted with one or more equivalents of a 3-monosubstituted oxetane or a 3,3-disubstituted oxetane, wherein the epoxide accelerant is selected from the group consisting of 2,2-substituted epoxide, 2,2,3-substituted epoxide, 2,2,3,3-substituted epoxide, and mixtures thereof. Also disclosed are oxetane polymers prepared by the processes of the invention.
    Type: Application
    Filed: June 25, 2015
    Publication date: July 13, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventor: James V. CRIVELLO
  • Patent number: 9705442
    Abstract: Motor drives and drive systems are provided. A motor drive of the subject invention can be an asymmetrical, multi-lane, multi-phase motor drive. The motor drive can include a master lane and slave lane having fewer phases than the master lane has. Each lane can be powered by a single direct current link.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: July 11, 2017
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Ali Mohammadpour, Leila Parsa
  • Publication number: 20170189857
    Abstract: The present disclosure relates to, inter alia, a modified surface comprising an optically active monomer, a polymeric material having a surface onto which the optically active monomer is covalently bound. In one aspect, a membrane comprising an optically active monomer, a poly(aryl sulfone) membrane having a surface onto which the optically active monomer is covalently bound. The present disclosure also relates to a method of modifying a surface, the method comprising applying sufficient energy to a surface to induce covalent bonding with an optically active monomer, and contacting the optically active monomer with the surface. In one aspect, a method of modifying a surface of a poly(aryl sulfone) membrane is disclosed. In another aspect, a method of synthesizing an optically active monomer is disclosed. In one aspect, a method of filtration of chiral compounds is disclosed.
    Type: Application
    Filed: July 8, 2015
    Publication date: July 6, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Georges BELFORT, Joseph IMBROGNO
  • Publication number: 20170181244
    Abstract: Flash light-generating methods and systems are provided, which, in one aspect, include: obtaining one or more measurements of existing light on or around an illumination target; ascertaining a desired color attribute(s) for a combined light to be provided on the illumination target, the combined light including the existing light and a flash light to be generated; determining a flash light spectral power distribution of illumination which achieves a combined light spectral power distribution of illumination on the illumination target having the desired color attribute(s), the determining using, in part, the measurement(s) of existing light, and the desired color attribute(s) for the combined light; and generating the flash light with the determined flash light spectral power distribution of illumination to provide the combined light on the illumination target having the combined light spectral power distribution of illumination with the desired color attribute(s).
    Type: Application
    Filed: November 25, 2014
    Publication date: June 22, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Michael SHUR, Anqing LIU
  • Publication number: 20170170025
    Abstract: Methods for facilitating fabricating semiconductor structures are provided which include: providing a multilayer structure including a semiconductor layer, the semiconductor layer including a dopant and having an increased conductivity; selectively increasing, using electrochemical processing, porosity of the semiconductor layer, at least in part, the selectively increasing porosity utilizing the increased conductivity of the semiconductor layer; and removing, at least in part, the semiconductor layer with the selectively increased porosity from the multilayer structure. By way of example, the selectively increasing porosity may include selectively, anodically oxidizing, at least in part, the semiconductor layer of the multilayer structure.
    Type: Application
    Filed: February 10, 2015
    Publication date: June 15, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Rajendra P. DAHAL, Ishwara B. BHAT, Tat-Sing CHOW
  • Publication number: 20170139060
    Abstract: Methods for fabricating radiation-detecting structures are presented. The methods include, for instance: fabricating a radiation-detecting structure, the fabricating including: providing a semiconductor substrate, the semiconductor substrate having a plurality of cavities extending into the semiconductor substrate from a surface thereof; and electrophoretically depositing radiation-detecting particles of a radiation-detecting material into the plurality of cavities extending into the semiconductor substrate, where the electrophoretically depositing fills the plurality of cavities with the radiation-detecting particles. In one embodiment, the providing can include electrochemically etching the semiconductor substrate to form the plurality of cavities extending into the semiconductor substrate.
    Type: Application
    Filed: June 22, 2015
    Publication date: May 18, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Rajendra P. DAHAL, Ishwara B. BHAT, Yaron DANON, James Jian-Qiang LU
  • Publication number: 20170133543
    Abstract: Radiation detecting-structures and fabrications methods thereof are presented. The methods include, for instance: providing a substrate, the substrate including at least one trench extending into the substrate from an upper surface thereof; and epitaxially forming a radiation-responsive semiconductor material layer from one or more sidewalls of the at least one trench of the substrate, the radiation-responsive semiconductor material layer responding to incident radiation by generating charge carriers therein. In one embodiment, the sidewalls of the at least one trench of the substrate include a (111) surface of the substrate, which facilitates epitaxially forming the radiation-responsive semiconductor material layer. In another embodiment, the radiation-responsive semiconductor material layer includes hexagonal boron nitride, and the epitaxially forming includes providing the hexagonal boron nitride with an a-axis aligned parallel to the sidewalls of the trench.
    Type: Application
    Filed: June 22, 2015
    Publication date: May 11, 2017
    Applicant: RENSSELAER POLYTECHNIC INSTITUTE
    Inventors: Rajendra P. DAHAL, Ishwara B. BHAT, Yaron DANON, James Jian-Qiang LU