Patents by Inventor Rajiv R. Singh

Rajiv R. Singh 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).

  • Composition of pentafluoropropane, pentafluoropropane and water
    Publication number: 20030199599
    Abstract: Disclosed are compositions comprising 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane and water, said compositions are environmentally desirable for use as blowing agents for polymer foam, refrigerants, aerosol propellants, metered dose inhalers, heat transfer media, and gaseous dielectrics.
    Type: Application
    Filed: April 16, 2002
    Publication date: October 23, 2003
    Inventors: Mary C. Bogdan, Hang T. Pham, David J. Williams, Leslie Bement, Ronald Riegal, Rajiv R. Singh, Kane D. Cook, Gary M. Knopeck
  • Azeotrope-like compositions of tetrafluoroethane, pentafluoropropane and methylbutane
    Patent number: 6635686
    Abstract: This invention provides azeotrope-like compositions of 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane-245fa and 2-methylbutane that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: October 21, 2003
    Assignee: Honeywell International Inc.
    Inventors: Mary C. Bogdan, Hang T. Pham, David J. Williams, Gary M. Knopeck, Rajiv R. Singh
  • Pentafluoropropane-based compositions
    Publication number: 20030141481
    Abstract: The present invention provides compositions comprising pentafluoropropane, a second component selected from the group consisting of decafluoropropane, perfluorobutyl methyl ether and combinations of these, and a third component selected from the group consisting of methanol, 1,2-trans-dichloroethylene and combinations of these. The present invention further provides for refrigerants, blowing agents, foam compositions, polyol premixes, closed-cell foams, sprayable compositions, and the like, comprising the present compositions.
    Type: Application
    Filed: December 17, 2002
    Publication date: July 31, 2003
    Inventors: Guillermo J. Hitters, Kane D. Cook, Gary M. Knopeck, Hang T. Pham, Ian R. Shankland, Rajiv R. Singh
  • Process for heating or cooling using mixtures of pentafluoropropane and a hydrofluorocarbon having 3 to 6 carbon atoms
    Patent number: 6557359
    Abstract: The invention discloses novel azeotrope-like mixtures of fluorinated compounds which are useful for heating and cooling as heat transfer agents and/or refrigerants. The azeotrope-like mixture comprises: (a) pentafluoropropane; and (b) a hydrofluorocarbon of the formula: CxFyHz, wherein x is 3, 4, 5, or 6 and y and z are each independently 1 or a positive whole number such that the result of y / (y+z) is greater than 0.67.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: May 6, 2003
    Assignee: Electric Power Research Institute, Inc.
    Inventors: David P. Wilson, Rajiv R. Singh, Rajat S. Basu, Ellen L. Swan, David Nalewajek
  • Method of introducing refrigerants into refrigeration systems
    Publication number: 20030070722
    Abstract: Provided are methods of charging refrigerants into refrigeration systems. The present methods involve recharging a refrigerant system that contains a chlorine-containing refrigerant and a lubricant comprising the steps of (a)providing a refrigeration system comprising a chamber having a hydrocarbon-based lubricant and substantially no chlorofluorocarbon refrigerant; and (b) introducing to the system a composition comprising: (i) a refrigerant; (ii) a surfactant; and (iii) a solubilizing agent.
    Type: Application
    Filed: August 19, 2002
    Publication date: April 17, 2003
    Inventors: Raymond H. P. Thomas, Roy P. Robinson, Rajiv R. Singh, David P. Wilson
  • Azeotrope-like compositions of tetrafluoroethane, pentafluoropropane and water
    Publication number: 20030073594
    Abstract: This invention provides azeotrope-like compositions of 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane-245fa and water that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Application
    Filed: June 10, 2002
    Publication date: April 17, 2003
    Inventors: Mary C. Bogdan, Gary M. Knopeck, Hang T. Pham, Rajiv R. Singh, David Dressler, David J. Williams
  • Hydrofluorocarbon refrigerant compositions soluble in lubricating oil
    Publication number: 20030062508
    Abstract: The present invention provides hydrofluorocarbon compositions suitable for use in a wide range of applications. The compositions of the present invention tend to be soluble in hydrocarbon lubricating oils, and thus, are especially useful in replacing CFC and HCFC compositions in refrigeration applications.
    Type: Application
    Filed: September 21, 2001
    Publication date: April 3, 2003
    Inventors: Rajiv R. Singh, Hang T. Pham, David P. Wilsom, David A. Metcalf
  • Compositions of hydrofluorocarbons and trans-1,2-dichloroethylene
    Publication number: 20030050356
    Abstract: The present invention provides compositions comprising an HFC component and a non-HFC component consisting essentially of methanol, having boiling points that are unexpectedly low and relatively constant, and uses thereof.
    Type: Application
    Filed: June 3, 2002
    Publication date: March 13, 2003
    Inventors: Mary C. Bogdan, Gary M. Knopeck, Hang T. Pham, Rajiv R. Singh, Kane D. Cook
  • Fluorine-containing compounds and polymers derived therefrom
    Publication number: 20030039919
    Abstract: An optical device comprising a polymer comprising at least one repeating unit derived from a compound of the following formula:
    Type: Application
    Filed: June 18, 2002
    Publication date: February 27, 2003
    Inventors: David Bradley, Dale Hangey, Jing J. Ma, David Nalewajek, Andrew Poss, Michael Van Der Puy, George Samuels, George Shia, Rajiv R. Singh, Ellen Swan, Raymond H. Thomas, Gary Zyhowski
  • Azeotrope-like compositions of pentafluoropropane
    Publication number: 20030030032
    Abstract: Disclosed are azeotrope-like compositions comprising 1,1,1,3,3-pentafluoropropane and at least one C3 or C4 hydrocarbon, and optionally water, said compositions are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Application
    Filed: April 12, 2002
    Publication date: February 13, 2003
    Inventors: Kane D. Cook, Rajiv R. Singh, Gary M. Knopeck, Mary C. Bogdan, Hang T. Pham, Leslie Bement, David J. Williams, James Bowman
  • Azeotrope-like compositions or pentafluorobutane
    Publication number: 20030022802
    Abstract: Disclosed are azeotrope-like compositions comprising 1,1,1,3,3-pentafluorobutane, water and a hydrocarbon selected from the group consisting of n-pentane, isopentane, cyclopentane, n-hexane, and isohexane., said compositions are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Application
    Filed: June 3, 2002
    Publication date: January 30, 2003
    Inventors: Mary C. Bogdan, Kane D. Cook, Hang T. Pham, Gary M. Knopeck, Rajiv R. Singh
  • Azeotrope-like compositions and a process for separating pentafluoroethane and hydrogen chloride
    Publication number: 20030015683
    Abstract: The present invention provides binary azeotrope-like compositions comprising pentafluoroethane (HFC-125) and hydrogen chloride (HCl). In addition, the invention relates to methods for removing HFC-125 or HCl from a mixture of HFC-125 and HCl by distilling the mixture to remove an azeotrope-like composition of HFC-125 and HCl in the column distillate.
    Type: Application
    Filed: June 3, 2002
    Publication date: January 23, 2003
    Inventors: Rajat S. Basu, Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung
  • Azeotrope-like compositions of tetrafluoroethane, pentafluoropropane and methylbutane
    Publication number: 20030013625
    Abstract: This invention provides azeotrope-like compositions of 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane-245fa and 2-methylbutane that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Application
    Filed: June 10, 2002
    Publication date: January 16, 2003
    Inventors: Mary C. Bogdan, Hang T. Pham, David J. Williams, Gary M. Knopeck, Rajiv R. Singh
  • Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride
    Publication number: 20030009065
    Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
    Type: Application
    Filed: June 3, 2002
    Publication date: January 9, 2003
    Inventors: Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung
  • Azeotrope-like compositions of tetrafluoroethane, pentafluoropropane, methylbutane and water
    Publication number: 20030004077
    Abstract: This invention provides azeotrope-like compositions of 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane-245fa and water that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Application
    Filed: June 10, 2002
    Publication date: January 2, 2003
    Inventors: Mary C. Bogdan, Hang T. Pham, David J. Williams, Gary M. Knopeck, Rajiv R. Singh, Kane D. Cook
  • Compositions of hydrofluorocarbons and methanol
    Publication number: 20020198274
    Abstract: The present invention provides compositions comprising an HFC component and a non-HFC component consisting essentially of methanol, having boiling points that are unexpectedly low and relatively constant, and uses thereof.
    Type: Application
    Filed: June 3, 2002
    Publication date: December 26, 2002
    Inventors: Mary C. Bogdan, Kane D. Cook, Hang T. Pham, Gary M. Knopeck, Rajiv R. Singh
  • Process for producing polymer foam using mixtures of pentafluoropropane and a hydrofluorocarbon having 3 to 6 carbon atoms
    Patent number: 6423757
    Abstract: The invention discloses novel azeotrope-like mixtures of fluorinated compounds which are useful for heating and cooling as heat transfer agents and/or refrigerants. The azeotrope-like mixture comprises: (a) pentafluoropropane; and (b) a hydrofluorocarbon of the formula: CxFyHz, wherein x is 3, 4, 5, or 6 and y and z are each independently 1 or a positive whole number such that the result of y/(y+z) is greater than 0.67.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: July 23, 2002
    Assignee: Electric Power Research Institute, Inc.
    Inventors: David P. Wilson, Rajiv R. Singh, Rajat S. Basu, Ellen L. Swan, David Nalewajek
  • HF ETCHING AND OXIDE SCALE REMOVAL
    Publication number: 20020063106
    Abstract: Methods for etching or removing oxide scale from a substrate by applying a composition containing a polymer and an effective amount of hydrofluoric acid and maintaining the composition on the substrate until the substrate is etched or the oxide scale is removed.
    Type: Application
    Filed: December 30, 1998
    Publication date: May 30, 2002
    Inventors: MATTHEW H. LULY, RAJIV R. SINGH, CHARLES L. REDMON, JEFFREY W. MCKOWN, ROBERT PRATT
  • Extraction of hydrogen fluoride from a halocarbon/hydrogen fluoride azeotropic mixture
    Patent number: 6156944
    Abstract: A process for the separation of mixtures containing halocarbons and hydrogen fluoride. Either water alone or a blend comprising water and hydrogen fluoride is added to a mixture comprising a halocarbon and hydrogen fluoride to thereby form a first phase rich in the halocarbon and a second phase rich in hydrogen fluoride and water. The most preferred halocarbon is 1,1,1,3,3-pentafluoropropane. Preferably, the first and second phases are then separated. Optionally, the second phase rich in hydroger fluoride and water is also separated.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: December 5, 2000
    Assignee: Honeywell International Inc.
    Inventors: Hang T. Pham, Rajiv R. Singh, Charles F. Swain, Michael Van Der Puy
  • Leak-detecting refrigerant compositions containing oxazolyl-coumarin dyes
    Patent number: 6132636
    Abstract: Refrigerant compositions containing oxazolyl-coumarin dyes for leak detection under ultraviolet light, and methods for the use of such dyes in leak detection.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: October 17, 2000
    Inventors: Rajiv R. Singh, Robert J. Schiller, Jr., Harold J. Kieta