Patents by Inventor Philip L. Bartlett

Philip L. Bartlett 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).

  • Patent number: 5532284
    Abstract: An improved closed cell polymer foam and foaming agent involving the use of a halocarbon blowing agent (e.g., HCFC-22, HCFC-123, HCFC-123a, and HCFC-141b) in combination with an effective amount of a gas barrier resin (e.g., an ethylene/vinyl acetate copolymer, ethylene/acrylic ester copolymer or acrylic ester polymer) uniformly dispersed in the continuous polymeric phase. The presence of the gas barrier resin is shown to significantly reduce the escape of blowing agent from and/or entry of air into the foam resulting in low thermal conductivity over a longer period of time and improved thermal insulation value.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: July 2, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo, Howard S. Hammel
  • Patent number: 5516811
    Abstract: An improved closed-cell polymer foam involves the use of a polyfluorocarbon forming agent (e.g., HCFC-22) in combination with an effective amount of a hydrogen bond forming blocking agent (e.g., organic ether, ester or ketone). The presence of the blocking agent is shown to significantly reduce the escape of blowing agent from and entry of air into the foam resulting in low thermal conductivity over a longer period of time and improved thermal insulation value.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: May 14, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo, Howard S. Hammel
  • Patent number: 5439947
    Abstract: An improved closed cell polymer foam and foaming agent involving the use of a hydrogen-containing halocarbon blowing agent (e.g., HCFC-22) in combination with an effective amount of a hydrogen bond forming blocking agent (e.g., organic ether, ester or ketone). The presence of the blocking agent is shown to significantly reduce the escape of blowing agent from and entry of air into the foam resulting in low thermal conductivity over a longer period of time and improved thermal insulation value.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: August 8, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo, Howard S. Hammel
  • Patent number: 5409962
    Abstract: Substantially constant boiling blowing agent compositions of 1,1,1,2-tetrafluoroethane and dimethyl ether.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: April 25, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo
  • 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
  • Patent number: 5221492
    Abstract: A binary azeotropic mixture of perfluoropropane or 1,1,1,2,3,3,3-heptafluoropropane and dimethyl ether.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: June 22, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip L. Bartlett
  • Patent number: 5182040
    Abstract: The azeotropic and azeotrope-like compositions of 1,1,1,2-tetrafluoroethane and one of 1,1-difluoroethane, 1-chloro-1,1,-difluoroethane, dimethyl ether, perfluorocyclobutane, n-butane, isobutane and 1,1,1,2,3,3,3-heptafluoropropane, and their use as refrigerants, aerosol propellants and blowing agents for polymer foams are disclosed. The azeotropic and azeotrope-like compositions of 1,1,1,2-tetrafluoroethane and one of perfluorocyclobutane and 1,1,1,2,3,3,3-heptafluoropropane are also useful as fire extinguishants.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: January 26, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Donald B. Bivens, Brooks S. Lunger, Akimichi Yokozeki
  • Patent number: 5164419
    Abstract: The use of 1,1-difluoroethane (HFC-152a) with a minimum amount of water, preferably in the absence of water, as the blowing agent is discolored as an efficient route to a rigid closed-cell polyurethane or polyisocyanurate foam of improved cell structure and excellent insulation properties.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: November 17, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo
  • Patent number: 5093377
    Abstract: The use of 1,1-difluoroethane (HFC-152a) and dimethyl ether, optionally with up to 50 mole % of water, as the blowing agent is disclosed as an efficient route to a rigid, closed-cell polyurethane or polyisocyanurate foam of improved cell structure and excellent insulation properties.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: March 3, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo
  • Patent number: 5061394
    Abstract: The azeotrope of 1-chloro-1,2,2,2-tetrafluoroethane and dimethyl ether is useful as a refrigerant, aerosol propellant and polymer foam blowing agent.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: October 29, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald B. Bivens, Akimichi Yokozeki, Philip L. Bartlett, Joseph A. Creazzo
  • Patent number: 5032318
    Abstract: A process is disclosed for inhibiting corrosion in tin-plated steel aerosol cans which contain aqueous aerosol formulations and a propellant. Compositions such as the isopropylamine, cyclohexylamine, 2-ethylhexylamine and tertiary C.sub.12-14 alkyl primary amine salts of N-acyl sarcosine; morpholine salts of oleic acid, acetic acid, benzoic acid, and N-acyl sarcosine; cyclohexylamine, 2-ethylhexylamine, tertiary C.sub.12-14 alkyl primary amine and tertiary C.sub.18-22 alkyl primary amine salts of benzoic acid are disclosed.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: July 16, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip L. Bartlett
  • Patent number: 5032317
    Abstract: A process is disclosed for inhibiting corrosion in tin-plated steel aerosol cans which contain aqueous aerosol formulations and a propellant. Compositions such as the isopropylamine, cyclohexylamine, 2-ethylhexylamine and tertiary C.sub.12-14 alkyl primary amine salts of N-acyl sarcosine; morpholine salts of oleic acid, acetic acid, benzoic acid, and N-acyl sarcosine; cyclohexylamine, 2-ethylhexylamine, tertiary C.sub.12-14 alkyl primary amine and tertiary C.sub.18-22 alkyl primary amine salts of benzoic acid are disclosed.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: July 16, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip L. Bartlett
  • Patent number: 5030385
    Abstract: A process is disclosed for inhibiting corrosion in tin-plated steel aerosol cans which contain aqueous aerosol formulations and a propellant. Compositions such as the isopropylamine, cyclohexylamine, 2-ethylhexylamine and tertiary C.sub.12-14 alkyl primary amine salts of N-acyl sarcosine; morpholine salts of oleic acid, acetic acid, benzoic acid, and N-acyl sarcosine; cyclohexylamine, 2-ethylhexylamine, tertiary C.sub.12-14 alkyl primary amine and tertiary C.sub.18-22 alkyl primary amine salts of benzoic acid are disclosed.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: July 9, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip L. Bartlett
  • Patent number: 4954289
    Abstract: Azeotropes of 1-chloro-1,2,2,2-tetrafluoroethane or 1-chloro-1,1-difluoroethane with n-butane or isobutane and their use as propellants and foam blowing agents.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: September 4, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo, Robert A. Gorski
  • Patent number: 4954290
    Abstract: Azeotropes of 1,1-dichloro-2,2,2-trifluoroethane with pentanes and their use as cleaning agents and foam blowing agents.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: September 4, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo, Robert A. Gorski
  • Patent number: 4927863
    Abstract: A process is disclosed comprising mixing selected shrinkage-minimizing halocarbons with selected two-carbon hydrogen-containing halocarbons, HCFC-123, HCFC-123a and HCFC-141b, and using this mixture as a blowing agent to produce minimal shrinkage closed-cell polyurethane foams.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: May 22, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Philip L. Bartlett, Joseph A. Creazzo
  • Patent number: 4923097
    Abstract: A solvent-based (non-aqueous) aerosol paint containing dimethyl ether as solvent or solvent and propellant and a film-forming paint resin formulation is disclosed.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: May 8, 1990
    Assignee: E. I. DuPont De Nemours and Company
    Inventor: Philip L. Bartlett
  • Patent number: 4604226
    Abstract: Corrosion inhibitor compositions comprising a mixture of an amine neutralized phosphate ester and a volatile amine selected from the group consisting of cyclohexylamine, morpholine and isopropylamine. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.
    Type: Grant
    Filed: March 22, 1985
    Date of Patent: August 5, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip L. Bartlett
  • Patent number: 4602958
    Abstract: Corrosion inhibitor compositions comprising a mixture of (1) a volatile amine selected from the group consisting of cyclohexylamine, isopropylamine and morpholine and (2) a tertiary C.sub.12-14 alkylammonium carboxylate selected from the group consisting of a C.sub.12-14 alkylammonium benzoate and a tertiary C.sub.12-14 alkylammonium-N-oleoyl sarcosinate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.
    Type: Grant
    Filed: April 9, 1985
    Date of Patent: July 29, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip L. Bartlett
  • Patent number: 4600530
    Abstract: Corrosion inhibitor compositions comprising a mixture of a nitroalkane containing 1-3 carbon atoms and a tertiary C.sub.12-14 alkylammonium carboxylate selected from the group consisting of a C.sub.12-14 alkylammonium benzoate and a tertiary C.sub.12-14 alkylammonium-N-oleoyl sarcosinate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: July 15, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Philip L. Bartlett