Patents by Inventor Velliyur Rao

Velliyur Rao 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: 20080042097
    Abstract: Disclosed herein are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene compositions for use in refrigeration and air conditioning systems, particularly in centrifugal compressor systems. Also disclosed are 5 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene in combination with hydrofluorocarbons, which are azeotropic or near azeotropic.
    Type: Application
    Filed: July 11, 2007
    Publication date: February 21, 2008
    Inventors: Mario Nappa, Barbara Minor, Allen Sievert, Velliyur Rao
  • Publication number: 20080027250
    Abstract: A process is disclosed for making hydrohalopropanes or hydrofluorobutanes. The process involves reacting a hydrofluoromethane with a fluoroolefin in the presence of an aluminum catalyst to produce a hydrohalopropane or a hydrofluorobutane. The hydrofluoromethane is CH2F2 or CH3F. The fluoroolefin is CF2?CF2, ClFC?CF2, or CF3CF?CF2.
    Type: Application
    Filed: July 20, 2007
    Publication date: January 31, 2008
    Inventors: Xuehui Sun, Mario Nappa, Velliyur Rao, Viacheslav Petrov, Ekaterina Swearingen, Nina Delyagina, Victor Cherstkov
  • Publication number: 20070108403
    Abstract: The present invention relates to fluoroolefin compositions. The fluoroolefin compositions of the present invention are useful as refrigerants or heat transfer fluids and in processes for producing cooling or heat. Additionally, the fluoroolefin compositions of the present invention may be used to replace currently used refrigerant or heat transfer fluid compositions that have higher global warming potential.
    Type: Application
    Filed: October 30, 2006
    Publication date: May 17, 2007
    Inventors: Allen Sievert, Mario Nappa, Barbara Minor, Thomas Leck, Velliyur Rao, Ekaterina Swearingen, Corneille Schmitz, Nandini Mouli, Deepak Perti
  • Publication number: 20060266975
    Abstract: Disclosed herein are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene compositions for use in refrigeration and air conditioning systems, particularly in centrifugal compressor systems. Also disclosed are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene in combination with at least one bromofluorocarbon, ketones, alcohols, chlorocarbons, ethers, esters, 4-chloro-1,1,2,3,3,4-hexafluorobutene, N-(difluoromethyl)-N,N-dimethylamine, or mixtures thereof, which are azeotropic or near azeotropic.
    Type: Application
    Filed: May 19, 2006
    Publication date: November 30, 2006
    Inventors: Mario Nappa, Barbara Minor, Velliyur Rao
  • Publication number: 20060255312
    Abstract: The present invention relates to Disclosed herein are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene compositions for use in refrigeration and air conditioning systems, particularly in centrifugal compressor systems. Also disclosed are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene in combination with hydrofluorocarbons, which are azeotropic or near azeotropic.
    Type: Application
    Filed: April 25, 2006
    Publication date: November 16, 2006
    Inventors: Mario Nappa, Barbara Minor, Allen Sievert, Velliyur Rao
  • Publication number: 20060249706
    Abstract: Disclosed herein are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene compositions for use in refrigeration and air conditioning systems, particularly in centrifugal compressor systems. Also disclosed are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene in combination with hydrocarbons, which are azeotropic or near azeotropic.
    Type: Application
    Filed: April 25, 2006
    Publication date: November 9, 2006
    Inventors: Mario Nappa, Barbara Minor, Velliyur Rao
  • Publication number: 20060243945
    Abstract: The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises a fluoroolefin and at least one other component. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and fire suppression and fire extinguishing agents.
    Type: Application
    Filed: March 30, 2006
    Publication date: November 2, 2006
    Inventors: Barbara Minor, Velliyur Rao, Donald Bivens, Deepak Perti, Mark Baunchalk
  • Publication number: 20060237683
    Abstract: The present invention relates to Disclosed herein are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene compositions for use in refrigeration and air conditioning systems, particularly in centrifugal compressor systems. Also disclosed are 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene in combination with fluoroethers, which are azeotropic or near azeotropic.
    Type: Application
    Filed: April 25, 2006
    Publication date: October 26, 2006
    Inventors: Mario Nappa, Barbara Minor, Allen Sievert, Velliyur Rao
  • Publication number: 20060180785
    Abstract: The present invention relates to compositions comprising HFC-63-14mcee. The compositions may be azeotropic or azeotrope-like and are useful in cleaning applications, as a defluxing agent, for removing oils or residues from a surface, depositing or removing lubricants from a surface, and as refrigerants or heat transfer fluids in refrigeration systems, air-conditioners and heat pumps.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 17, 2006
    Inventors: Abid Merchant, Barbara Minor, Shoeb Moiyadi, Velliyur Rao, Melodie Schweitzer, Allen Sievert, Nancy Tucker
  • Publication number: 20060142622
    Abstract: A gold-lined pyrolysis reactor is used to pyrolyze compounds to form fluoroolefins like tetrafluoroethylene and hexafluoropropylene in high yield, with minimum to no formation of perfluoroisobutylene, chlorotrifluoroethylene, coke, salts, or polymer.
    Type: Application
    Filed: February 22, 2006
    Publication date: June 29, 2006
    Inventors: Peter Gelblum, Norman Herron, Charles Noelke, Velliyur Rao
  • Publication number: 20060094911
    Abstract: 1,1,3,3,3-Pentafluoropropene (CF3CH?CF2, HFC-1225zc) can be produced by pyrolyzing 1,1,1,3,3,3-hexafluoropropane (CF3CH2CF3, HFC-236fa) in the absence of dehydrofluorination catalyst at temperatures of from about 700° C. to about 1000° C. and total pressures of about atmosphere pressure in an empty, tubular reactor, the interior surfaces of which comprise materials of construction resistant to hydrogen fluoride.
    Type: Application
    Filed: October 27, 2005
    Publication date: May 4, 2006
    Inventors: Velliyur Rao, Allen Sievert, Ralph Miller
  • Publication number: 20050227865
    Abstract: A crystalline alpha-chromium oxide where from about 0.05 atom % to about 2 atom % of the chromium atoms in the alpha-chromium oxide lattice are substituted by nickel atoms, and optionally, additional chromium atoms in the alpha-chromium oxide lattice are substituted by trivalent cobalt atoms (provided that the total amount of the nickel atoms and the trivalent cobalt atoms in the alpha-chromium oxide lattice is no more than 6 atom %) is disclosed. Also disclosed is a chromium-containing catalyst composition comprising as a chromium-containing component the crystalline substituted alpha-chromium oxide; and a method for preparing a composition comprising the crystalline substituted alpha-chromium oxide.
    Type: Application
    Filed: August 21, 2003
    Publication date: October 13, 2005
    Inventors: Mario Nappa, Velliyur Rao, H. Rosenfield, Shekhar Surramoney, Munirpallam Subramanian, Allen Sievert
  • Publication number: 20050137430
    Abstract: The present invention relates to the pyrolysis of hydrochlorofluorocarbons to form fluoromonomers such as tetrafluoroethylene, the pyrolysis being carried out in a reaction zone lined with nickel and mechanically supported by a jacket of other corrosion resistant metal, the nickel lining providing an improved yield of valuable reaction products.
    Type: Application
    Filed: December 17, 2003
    Publication date: June 23, 2005
    Inventors: Charles Noelke, Velliyur Rao
  • Publication number: 20050082509
    Abstract: The present invention relates to new fluorosulfone compounds. These fluorosulfone compounds have utility in preventing, controlling and extinguishing fire.
    Type: Application
    Filed: August 11, 2004
    Publication date: April 21, 2005
    Inventors: Allen Sievert, Mario Nappa, Velliyur Rao, Paul Resnick
  • Publication number: 20050080302
    Abstract: A liquid phase process is disclosed for producing halogenated alkane adducts of the formula CAR1R2CBR3R4 (where A, B, R1, R2, R3, and R4 are as defined in the specification) which involves contacting a corresponding halogenated alkane, AB, with a corresponding olefin, CR1R2?CR3R4 in a dinitrile or cyclic carbonate ester solvent which divides the reaction mixture into two liquid phases and in the presence of a catalyst system containing (i) at least one catalyst selected from monovalent and divalent copper; and optionally (ii) a promoter selected from aromatic or aliphatic heterocyclic compounds which contain at least one carbon-nitrogen double bond in the heterocyclic ring. When hydrochlorofluorocarbons are formed, the chlorine content may be reduced by reacting the hydrochlorofluorocarbons with HF. New compounds disclosed include CF3CF2CCl2CH2CCl3, CF3CCl2CH2CH2Cl and CF3CCl2CH2CHClF. These compounds are useful as intermediates for producing hydrofluorocarbons.
    Type: Application
    Filed: October 1, 2004
    Publication date: April 14, 2005
    Inventors: Ralph Baker, Ralph Miller, Viacheslav Petrov, Velliyur Rao, Allen Sievert
  • Publication number: 20050033095
    Abstract: The present invention relates to new fluoroketone compounds from the groups monobromoperfluoroketones, monohydromonobromoperfluoroketones, (perfluoroalkoxy)monobromoperfluoroketones, (fluoroalkoxy)monobromoperfluoroketones, and monochloromonobromoperfluoroketones. These fluoroketone compounds have utility in preventing, controlling and extinguishing fire. These fluoroketone compounds have further utility as additives to reduce or eliminate the flammability of normally flammable working fluids such as refrigerants, foam blowing agents, solvents, aerosol propellants, and sterilants.
    Type: Application
    Filed: June 18, 2004
    Publication date: February 10, 2005
    Inventors: Mario Nappa, Velliyur Rao, Allen Sievert
  • Publication number: 20050023007
    Abstract: The present invention relates to methods of using at least one fluoroketone selected from monobromoperfluoroketones, monohydromonobromoperfluoroketones, (perfluoroalkoxy)monobromoperfluoroketones, (fluoroalkoxy)monobromoperfluoroketones, and monochloromonobromoperfluoroketones for i) extinguishing fire by applying to the fire such a fluoroketone, ii) preventing fire in an air-containing enclosed area containing combustible materials by introducing into the area such a fluoroketone and maintaining the fluoroketone in an amount sufficient to suppress combustion of combustible materials in the enclosed area, and iii) reducing or eliminating the flammability of a flammable working fluid, by mixing between about 0.1 to about 99 percent by weight of such a fluoroketone with the flammable working fluid.
    Type: Application
    Filed: June 18, 2004
    Publication date: February 3, 2005
    Inventors: Mario Nappa, Velliyur Rao, Allen Sievert