Patents by Inventor C. Kumar

C. Kumar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130012667
    Abstract: Siloxane-containing reactive compounds contain moisture-curable alkoxy-silane functional end groups and also contain fluorocarbon-containing segments. The siloxane-containing and fluorocarbon-containing reactive compounds may be prepared from siloxane-containing and fluorocarbon-containing oxamide compounds or amine compounds. Siloxane-containing and fluorocarbon-containing polymers may be prepared from the reactive compounds by reaction with water. The siloxane-containing and fluorocarbon-containing polymers may be release materials or adhesives.
    Type: Application
    Filed: December 20, 2010
    Publication date: January 10, 2013
    Inventors: Richard G. Hansen, David S. Hays, Suresh Iyer, John W. Frank, Ramesh C. Kumar
  • Publication number: 20130010823
    Abstract: A quantum cascade laser having a lower laser level backfilling given by an equation that accounts for the degeneracy of energy states due to the presence of multiple subbands. For mid-infrared quantum cascade lasers at room temperature and a typical number of injector subbands, the voltage defect is between 90 meV and 110 meV at a current density of 80% of the rollover current density.
    Type: Application
    Filed: July 5, 2012
    Publication date: January 10, 2013
    Inventors: Richard Maulini, Arkadiy Lyakh, Alexei Tsekoun, C. Kumar N. Patel
  • Publication number: 20130011673
    Abstract: Siloxane-containing reactive compounds contain moisture-curable alkoxy-silane functional end groups. The siloxane-containing reactive compounds may be prepared from siloxane-containing oxamide compounds or amine compounds. Siloxane-containing polymers may be prepared from the reactive compounds by reaction with water. The siloxane-containing polymers may be release materials or adhesives.
    Type: Application
    Filed: December 20, 2010
    Publication date: January 10, 2013
    Inventors: Richard G. Hansen, David S. Hays, Suresh Iyer, John W Frank, Ramesh C. Kumar
  • Publication number: 20120289736
    Abstract: Compounds containing at least one perfluoropolyether segment and at least two oxalylamino groups as well as methods of making these compounds are described. The compounds can be polymeric materials or can be used in the preparation of various copolymeric materials by reaction with compounds having at least two primary or secondary amino groups.
    Type: Application
    Filed: December 22, 2010
    Publication date: November 15, 2012
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Yu Yang, Miguel A. Guerra, Richard G. Hansen, David S. Hays, Suresh S. Iyer, Ramesh C. Kumar, George G.I. Moore
  • Publication number: 20120264890
    Abstract: Copolymers containing at least one perfluoropolyether segment and at least one polydiorganosiloxane segments are described. The copolymers further contain multiple aminooxalylamino groups that link the various segments together. Methods of making the copolymers are also described.
    Type: Application
    Filed: December 22, 2010
    Publication date: October 18, 2012
    Inventors: Richard G. Hansen, Miguel A. Guerra, David S. Hays, Suresh S. Iyer, Ramesh C. Kumar, George G.I. Moore, Yu Yang
  • Publication number: 20120259088
    Abstract: Copolymers containing at least one perfluoropolyether segment and multiple aminooxalylamino groups are described. Methods of making the copolymers are also described. The copolymers can be prepared by reacting an oxalylamino-containing compound and an amine compound having at least two primary amino groups, at least two secondary amino groups, or at least one primary amino group plus at least one secondary amino group.
    Type: Application
    Filed: December 22, 2010
    Publication date: October 11, 2012
    Inventors: Suresh S. Iyer, Miguel A. Guerra, Richard G. Hansen, David S. Hays, Ramesh C. Kumar, George G.I. Moore, Yu Yang
  • Patent number: 8247775
    Abstract: A system and method for standoff detection of explosives, CWAs and TICs using optical techniques. Preliminary analysis indicates detection of TNT at a distance of 0.5 km with a signal-to-noise ratio exceeding 10,000. The optical/thermal techniques apparently permit unambiguous detection of the target molecules even the presence of commonly encountered interferents. The technique, named Remote Optothermal Sensor (ROSE), has the potential for standoff detection at distances greater than one (1) kilometer.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: August 21, 2012
    Inventors: C Kumar N Patel, Anadi Mukherjee
  • Publication number: 20120153156
    Abstract: A system and method for standoff detection of explosives, CWAs and TICs using optical techniques. Preliminary analysis indicates detection of TNT at a distance of 0.5 km with a signal-to-noise ratio exceeding 10,000. The optical/thermal techniques apparently permit unambiguous detection of the target molecules even the presence of commonly encountered interferents. The technique, named Remote Optothermal Sensor (ROSE), has the potential for standoff detection at distances greater than one (1) kilometer.
    Type: Application
    Filed: February 12, 2008
    Publication date: June 21, 2012
    Inventors: C. Kumar N. Patel, Anadi Mukherjee
  • Patent number: 8121164
    Abstract: A quantum cascade laser (QCL) having a bias-neutral design and a semiconductor with multiple layers of AlxIn1-xAs/InyGa1-yAs. The first active region barrier has a thickness of less than fourteen angstroms, and the second active region barrier has a thickness of less than eleven angstroms. The lower active region wavefunction overlaps with each of the injector level wavefunctions. Also, the laser transition is vertical at a bias close to roll-over. The injector level 3? is above a lower laser level 3, the injector level 2? is below the lower laser level 3, and the active region level 2 is confined to the active region. The lower laser level 3 is separated from the active region level 2 by the energy of the LO phonon. The remaining active region states and the remaining injector states are either above the lower laser level 3 or significantly below the active region level 2.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: February 21, 2012
    Assignee: Pranalytica, Inc.
    Inventors: Arkadiy Lyakh, Richard Maulini, Alexei Tsekoun, C. Kumar N. Patel
  • Patent number: 8088611
    Abstract: The present invention provides, in part, AKT3 polypeptides and methods of use thereof along with nucleic acids encoding the polypeptides. For example, methods for screening for AKT3 inhibitors are provided herein.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: January 3, 2012
    Assignee: Schering Corp.
    Inventors: Andrew J. Prongay, Thierry O. Fischmann, Chandra C. Kumar, Vincent S. Madison, Joseph E. Myers, Paul Reichert, Rosalinda Syto, William T. Windsor, Li Xiao, Todd W. Mayhood
  • Publication number: 20110300296
    Abstract: Methods for preparing silicone-containing polymers by essentially adiabatic polymerization methods are disclosed. The polymerization system includes free radically polymerizable monomers. The monomers include ethylenically unsaturated cone-containing monomers and/or mercapto-functional silicones as well as additional free radically polymerizable monomers. The silicone-containing polymers are useful as adhesives or release materials.
    Type: Application
    Filed: November 23, 2009
    Publication date: December 8, 2011
    Inventors: Audrey A. Sherman, Mark F. Ellis, Ramesh C. Kumar, Sonja S. MacKey, Richard L. Peloquin, Jeffrey O. Emslander
  • Patent number: 8068524
    Abstract: A submount for a semiconductor laser. The submount has a layer of silicon carbide (SiC) and a layer of aluminum nitride (AlN) deposited on the layer of SiC. The submount is bonded to the InP-based laser by a hard solder applied to the AlN layer. Preferably, the thickness of the AlN layer is ten to twenty microns, the thickness of the SiC layer is two hundred fifty microns, and the solder is a gold-tin (AuSn) eutectic. The semiconductor laser may be a quantum cascade laser (QCL). Similar combinations of submount materials can be found for other semiconductor laser material systems and types.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: November 29, 2011
    Assignee: Pranalytica, Inc.
    Inventors: C. Kumar N. Patel, Arkadiy Lyakh, Alexei Tsekoun, Richard Maulini
  • Publication number: 20110289007
    Abstract: A sensitive user data management method and system. The method includes presenting, by a negotiable content sensitive user data service (NSUDS) computing system from a consumer accessing a consumer computer in communication with a service provider computing system, a request for verifying if a provider computing system is associated with an NSUDS registry. The NSUDS computing system verifies an association with the NSUDS registry and connects to the consumer computer. The NSUDS computing system presents default sensitive user terms associated with sensitive user data for the consumer. The sensitive user data is associated with an order request. The NSUDS computing system receives from the consumer in response to the default sensitive user terms, a command associated with the default sensitive user terms.
    Type: Application
    Filed: May 18, 2010
    Publication date: November 24, 2011
    Applicant: International Business Machines Corporation
    Inventors: Bharath Duggirala, Krishna C. Kumar, Murthy V. Rallapalli, Kamalakanth Satuluru
  • Publication number: 20110244226
    Abstract: Blended release materials including a blend of a fluoro-functional silicone release polymer and a fluoropolymer are described. Exemplary fluoropolymers include fluoroolefin-based polymers and linear fluoropolymers including linear fluoroacryaltes. Articles including such release materials such as release liners, and adhesive articles, including silicone adhesive articles, are also described.
    Type: Application
    Filed: December 14, 2009
    Publication date: October 6, 2011
    Inventors: Jayshree Seth, Zai-Ming Qiu, Marie A. Boulos, Michael A. Semonick, Ramesh C. Kumar
  • Patent number: 8014430
    Abstract: A quantum cascade laser utilizing non-resonant extraction design having a multilayered semiconductor with a single type of carrier; at least two final levels (1 and 1?) for a transition down from level 2; an energy spacing E21 greater than ELO; an energy spacing E31 of about 100 meV; and an energy spacing E32 about equal to ELO. The carrier wave function for level 1 overlaps with the carrier wave function for level 2. Likewise, the carrier wave function for level 1? overlaps with the carrier wave function for level 2. In a second version, the basic design also has an energy spacing E54 of about 90 meV, and levels 1 and 1? do not have to be spatially close to each other, provided that level 2 has significant overlap with both these levels. In a third version, there are at least three final levels (1, 1?, and 1?) for a transition down from level 2. Each of the levels 1, 1?, and 1? has a non-uniform squared wave function distribution.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: September 6, 2011
    Assignee: President and Fellows of Harvard College
    Inventors: C. Kumar N. Patel, Alexei Tsekoun, Richard Maulini, Arkadiy Lyakh, Christian Pflugl, Laurent Diehl, Qijie Wang, Federico Capasso
  • Publication number: 20110158270
    Abstract: Methods and apparatus for broad tuning of single wavelength quantum cascade lasers and the use of light output from such lasers for highly sensitive detection of trace gases such as nitrogen dioxide, acetylene, and vapors of explosives such as trinitrotoluene (TNT) and triacetone triperoxide (TATP) and TATP's precursors including acetone and hydrogen peroxide. These methods and apparatus are also suitable for high sensitivity high selectivity detection of other chemical compounds including chemical warfare agents and toxic industrial chemicals. A quantum cascade laser (QCL) system that better achieves single mode, continuous, mode-hop free tuning for use in L-PAS (laser photoacoustic spectroscopy) by independently coordinating gain chip current, diffraction grating angle and external cavity length is described. An all mechanical method that achieves similar performance is also described. Additionally, methods for improving the sensor performance by critical selection of wavelengths are presented.
    Type: Application
    Filed: March 7, 2011
    Publication date: June 30, 2011
    Inventors: C. Kumar N. Patel, Ilya Dunayevskiy, Manu Prasanna, Rowel C. Go, Alexei Tsekoun, Michael Pushkarsky, Richard Maulini
  • Publication number: 20110102788
    Abstract: Methods and apparatus for broad tuning of single wavelength quantum cascade lasers and the use of light output from such lasers for highly sensitive detection of trace gases such as nitrogen dioxide, acetylene, and vapors of explosives such as trinitrotoluene (TNT) and triacetone triperoxide (TATP) and TATP's precursors including acetone and hydrogen peroxide. These methods and apparatus are also suitable for high sensitivity, high selectivity detection of other chemical compounds including chemical warfare agents and toxic industrial chemicals. A quantum cascade laser (QCL) system that better achieves single mode, continuous, mode-hop free tuning for use in L-PAS (laser photoacoustic spectroscopy) by independently coordinating gain chip current, diffraction grating angle and external cavity length is described. An all mechanical method that achieves similar performance is also described. Additionally, methods for improving the sensor performance by critical selection of wavelengths are presented.
    Type: Application
    Filed: November 1, 2010
    Publication date: May 5, 2011
    Inventors: C. Kumar N. Patel, IIya Dunayevskiy, Manu Prasanna, Rowel C. Go, Alexei Tsekoun, Michael Pushkarsky, Richard Maulini
  • Publication number: 20110103416
    Abstract: Methods and apparatus for broad tuning of single wavelength quantum cascade lasers and the use of light output from such lasers for highly sensitive detection of trace gases such as nitrogen dioxide, acetylene, and vapors of explosives such as trinitrotoluene (TNT) and triacetone triperoxide (TATP) and TATP's precursors including acetone and hydrogen peroxide. These methods and apparatus are also suitable for high sensitivity, high selectivity detection of other chemical compounds including chemical warfare agents and toxic industrial chemicals. A quantum cascade laser (QCL) system that better achieves single mode, continuous, mode-hop free tuning for use in L-PAS (laser photoacoustic spectroscopy) by independently coordinating gain chip current, diffraction grating angle and external cavity length is described. An all mechanical method that achieves similar performance is also described. Additionally, methods for improving the sensor performance by critical selection of wavelengths are presented.
    Type: Application
    Filed: November 1, 2010
    Publication date: May 5, 2011
    Inventors: C. Kumar N. Patel, Ilya Dunayevskiy, Manu Prasanna, Rowel C. Go, Alexei Tsekoun, Michael Pushkarsky, Richard Maulini
  • Publication number: 20110103411
    Abstract: Methods and apparatus for broad tuning of single wavelength quantum cascade lasers and the use of light output from such lasers for highly sensitive detection of trace gases such as nitrogen dioxide, acetylene, and vapors of explosives such as trinitrotoluene (TNT) and triacetone triperoxide (TATP) and TATP's precursors including acetone and hydrogen peroxide. These methods and apparatus are also suitable for high sensitivity, high selectivity detection of other chemical compounds including chemical warfare agents and toxic industrial chemicals. A quantum cascade laser (QCL) system that better achieves single mode, continuous, mode-hop free tuning for use in L-PAS (laser photoacoustic spectroscopy) by independently coordinating gain chip current, diffraction grating angle and external cavity length is described. An all mechanical method that achieves similar performance is also described. Additionally, methods for improving the sensor performance by critical selection of wavelengths are presented.
    Type: Application
    Filed: November 1, 2010
    Publication date: May 5, 2011
    Inventors: C. Kumar N. Patel, Ilya Dunayevskiy, Manu Prasanna, Rowel C. Go, Alexei Tsekoun, Michael Pushkarsky, Richard Maulini
  • Publication number: 20110103412
    Abstract: Methods and apparatus for broad tuning of single wavelength quantum cascade lasers and the use of light output from such lasers for highly sensitive detection of trace gases such as nitrogen dioxide, acetylene, and vapors of explosives such as trinitrotoluene (TNT) and triacetone triperoxide (TATP) and TATP's precursors including acetone and hydrogen peroxide. These methods and apparatus are also suitable for high sensitivity, high selectivity detection of other chemical compounds including chemical warfare agents and toxic industrial chemicals. A quantum cascade laser (QCL) system that better achieves single mode, continuous, mode-hop free tuning for use in L-PAS (laser photoacoustic spectroscopy) by independently coordinating gain chip current, diffraction grating angle and external cavity length is described. An all mechanical method that achieves similar performance is also described. Additionally, methods for improving the sensor performance by critical selection of wavelengths are presented.
    Type: Application
    Filed: November 1, 2010
    Publication date: May 5, 2011
    Inventors: C. Kumar N. Patel, Ilya Dunayevskiy, Manu Prasanna, Rowel C. Go, Alexei Tsekoun, Michael Pushkarsky, Richard Maulini