Patents by Inventor Abid N. Merchant

Abid N. Merchant 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).

  • Compositions comprising 1,1,1,2,2,3,4,5,5,6,6,7,7,7-tetradecafluoroheptane and uses thereof
    Patent number: 7476331
    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: Grant
    Filed: February 3, 2006
    Date of Patent: January 13, 2009
    Assignee: E I Du Pont Nemours and Company
    Inventors: Abid N. Merchant, Barbara Haviland Minor, Shoeb A. Moiyadi, Melodie A. Schweitzer, Allen Capron Sievert
  • Ternary azeotropic compositions
    Patent number: 5580906
    Abstract: Azeotropic or azeotrope-like compositions of effective amounts of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, heptane and an alcohol such as methanol, ethanol, n-propanol or isopropanol, to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: December 3, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Barbara H. Minor
  • Hydrofluorocarbon cleaning compositions
    Patent number: 5531916
    Abstract: Cleaning compositions comprising an acyclic aliphatic hydrofluorocarbon represented by the formula:C.sub.x H.sub.y F.sub.2x+2-ywhere x equals 4, 5 or 6, y equals 1, 2 or 3 with the proviso that when x equals 4, Y equals 2 or 3, and a co-solvent boiling between 20.degree. C.-105.degree. C. that are alcohols, esters, ethers, ketones, chlorinated hydrocarbons, optionally containing fluorine, having 1-4 carbons atoms, acetonitrile and nitromethane.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: July 2, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Method for purifying dichloropentafluoropropanes
    Patent number: 5430206
    Abstract: A method of recovering pure dichloropentafluoropropane from a mixture of dichloropentaflouropropane and chloroform (including breaking the azeotropic mixture thereof) involving selectively fluorinating the chloroform to the lower boiling dichloromonofluoromethane and then distilling to separate and recover pure dichloropentafluoropropane.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: July 4, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Allen C. Sievert
  • Azeotrope-like mixtures of 1,1-dichloro-2,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane
    Patent number: 5318716
    Abstract: Azeotrope-like mixtures of 1,1-dichloro-2,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane, being useful as cleaning solvents, refrigerants and foam blowing agents.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: June 7, 1994
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo, Abid N. Merchant
  • Ternary azeotropic compositions
    Patent number: 5250208
    Abstract: Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4,-octofluorobutane; trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, 1,1-dichloroethane, or 1,3-dichloro-1,2,2,3,3-HCFC-225cb; and an alcohol such as methanol, ethanol, or isopropanol, to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: October 5, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Janet C. Sung
  • Azeotropic compositions of 1,1-dichloro-1-fluoroethane and methanol/ethanol
    Patent number: 5246617
    Abstract: Azeotropic mixtures of 1,1-dichloro-1-fluoroethane (HCFC-141b) with methanol or ethanol, the azeotropic mixtures being useful in solvent cleaning applications.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: September 21, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Akimichi Yokozeki
  • Ternary azeotropic compositions of 1,1-dichloro-1,2-difluoroethane and cis-1,2-dichloroethylene with methanol or ethanol or n-propanol
    Patent number: 5240634
    Abstract: Azeotropic mixtures of 1,1-dichloro-1,2-difluoroethane (HCFC-132c) and cis-1,2-dichloroethylene (c-HCC-1130) with methanol, or ethanol or n-propanol are useful in solvent cleaning applications, as refrigerants, aerosol propellants and blowing agents.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: August 31, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Constant-boiling, azeotrope-like mixtures of dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane and methanol and/or ethanol
    Patent number: 5227087
    Abstract: Constant boiling, azeotrope-like mixtures of dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane and methanol and/or ethanol, the constant-boiling, azeotrope-like mixtures being useful in solvent cleaning applications.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: July 13, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Azeotropic compositions of 1,1,2,2,3,3,4,4-octafluorobutane and alcohols or ketones
    Patent number: 5221493
    Abstract: Azeotropic mixtures of HFC-338pcc and an alcohol such as methanol, ethanol, isopropanol or N-propanol, or a ketone such as acetone, are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, and displacement drying agents.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: June 22, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Allen C. Sievert, Akimichi Yokozeki, Janet C. Sung
  • Azeotropic composition of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and trans-1,2-dichloroethylene, cis-1,2-dichloroethylene or 1,1-dichlorethane
    Patent number: 5196137
    Abstract: Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC-43-10mee) and trans-1,2-dichloroethylene, cis-1,2-dichloroethylene or 1,1-dichloroethane are useful as cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: March 23, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Binary azeotropic compositions of 1,1,2,2,3,3,4,4-octafluorobutane and either tran-1,2-dichloroethylene, cis 1,2-dichloroethylene, or 1-1 dichloroethane
    Patent number: 5194170
    Abstract: Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4-octafluorobutane and trans-1,2-dichloroethylene; cis-1,2-dichloroethylene; or 1,1-dichloroethane to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: March 16, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Janet C. Sung
  • Ternary azeotropic compositions of dichloropentafluoropropane and trans-1,2-dichloroethylene with methanol or ethanol or isopropanol
    Patent number: 5116525
    Abstract: Azeotropic mixtures of dichloropentafluoropropane (HCFC-225) and trans-1,2-dichloroethylene (T-HCC-1130) with methanol or ethanol or isopropanol, are useful in solvent cleaning applications as refrigerants, aerosol propellants and polymer blowing agents.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: May 26, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • High-boiling hydrochlorofluorocarbon solvent blends
    Patent number: 5104564
    Abstract: A high-boiling hydrochlorofluorofluorocarbon (HCFC) solvent comprising a blend of for every 100 parts by weight of a hydrochlorofluorocarbon (e.g., 1,1,1-trifluorodichloroethane or 1,1-dichloro-1-fluoroethane) from about 25 to about 400 parts by weight of a selected organic solvent (e.g., dipropylene glycol monomethyl ether, dipropylene glycol monomethyl ether acetate, or mixture of dimethyladipate, dimethylglutarate, and dimethylsuccinate). Such solvents are useful in liquid/vapor phase cleaning applications even at elevated temperatures above the boiling temperature predicted by Raoult's law.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: April 14, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David S. Lermond, Kenneth T. Dishart, Abid N. Merchant
  • Binary azeotropic compositions of polyfluoropentanes and methanol
    Patent number: 5100572
    Abstract: An azeotropic mixture of polyfluoropentanes and methanol is disclosed. The azeotropic mixture is useful as: a cleaning agent, a blowing agent, a refrigerant, an aerosol propellant, a heat transfer medium and a power cycle working fluid.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: March 31, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Ternary azeotropic compositions of 1,1,1,2,3,3-hexafluoro-3-methoxypropane and cis-1,2-dichloroethylene with methanol or ethanol or isopropanol or n-propanol
    Patent number: 5098595
    Abstract: Azeotropic mixtures of 1,1,1,2,3,3-hexafluoro-3-methoxypropane with cis 1,2-dichloroethylene (c-CFC-1130) and methanol or ethanol or isopropanol or n-propanol, the azeotropic mixtures being useful in solvent cleaning applications.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: March 24, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Binary azeotropic compositions of 2,2-dichloro-1,2-difluoroethane with methanol, ethanol, or trans-1,2-dichloroethylene
    Patent number: 5066417
    Abstract: Azeotropic mixtures of 2,2-dichloro-1,2-difluoroethane (HCFC-132c) with methanol, ethanol, or trans-1,2-dichloroethylene (t-HCC-1130), the azeotropic mixtures being useful in solvent cleaning applications.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: November 19, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Binary azeotropic compositions of 3-chloro-1,1,1-trifluoropropane with methanol or ethanol, or trans-1,2-dichloroethylene
    Patent number: 5066418
    Abstract: Azeotropic mixtures of 3-chloro-1,1,1-trifluoropropane (HCFC-253fb) with trans-1,2-dichloroethylene (t-HCC-1130) are useful in solvent cleaning applications.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: November 19, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Binary azeotropic compositions of (CF.sub.3 CHFCHFCF.sub.2 CF.sub.3) with methanol or ethanol or isopropanol
    Patent number: 5064559
    Abstract: Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and methanol or ethanol or isopropanol, the azeotropic mixtures being useful in solvent cleaning applications, as blowing agents, refrigerants, heating mediums and aerosol propellants.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: November 12, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Carl G. Krespan
  • Ternary azeotropic compositions of 43-10mee (CF.sub.3 CHFCHFCH.sub.2 CF.sub .
    Patent number: 5064560
    Abstract: Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and trans 1,2-dichloroethylene with methanl or ethanol, the azeotropic mixtures being useful in solvent cleaning applications.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: November 12, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant