Patents Represented by Attorney Mark A. Edwards
  • Patent number: 6991744
    Abstract: The present invention provides compositions that are useful for compatibilizing a conventional, non-polar, compression refrigeration lubricant and a hydrofluorocarbon and/or hydrochlorofluorocarbon refrigerant in a compression refrigeration apparatus. Additionally, these compositions promote efficient return of lubricant from the non-compressor zones to the compressor zones of the aforesaid refrigeration apparatus.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: January 31, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Walter Mahler, Leo Ernest Manzer
  • Patent number: 6962665
    Abstract: The present invention provides compositions that are useful for compatabilizing a conventional, non-polar, compression refrigeration lubricant and a hydrofluorocarbon and/or hydrochlorofluorocarbon refrigerant in a compression refrigeration apparatus. Additionally, these composition promote efficeint return of lubricant from the non-compressor zones to the compressor zones of the aforesaid refrigeration apparatus.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: November 8, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Walter Mahler
  • Patent number: 6951835
    Abstract: Disclosed are binary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC-43-10mee) or nonafluoromethoxybutane. The present invention further includes ternary or quaternary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane and 1,1,1,2,3,4,4,5,5,5-decafluoropentane or nonafluoromethoxybutane, and additionally trans-1,2-dichloroethylene, n-propyl bromide, acetone, methanol, ethanol or isopropanol.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: October 4, 2005
    Assignees: E.I. du Pont de Nemours and Company, Micro Care Corporation
    Inventors: Barbara Haviland Minor, Melodie A. Schweitzer, Thomas L. Tattersall
  • Patent number: 6932918
    Abstract: The present invention relates to the discovery of compositions which include fluoroethane, 2-fluoropropane or tert-butylfluoride. These compositions are useful as pure components or with at least one of tetrafluoroethane, difluoroethane, hexafluoropropane, a hydrocarbon or dimethylether. These compositions are useful as aerosol propellants, refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, 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: April 22, 2003
    Date of Patent: August 23, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Barbara Haviland Minor, Vinci Martinez Felix, Allen Capron Sievert
  • Patent number: 6905630
    Abstract: This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2?bOc wherein a=2 or 3 and 3?b?8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2?m wherein 1?n?4 and 1?m?8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, 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: June 18, 2004
    Date of Patent: June 14, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
  • Patent number: 6899820
    Abstract: The present invention relates to refrigerant compositions comprising a fluorocarbon, an oxygenated lubricant, a non-oxygenated lubricant, and a compatibilizer. The present invention further relates to methods for replacing a chlorofluorocarbon and/or hydrochlorofluorocarbon and a non-oxygenated lubricant composition with a fluorocarbon and an oxygenated lubricant composition in a compression refrigeration system without flushing residual non-oxygenated lubricant from the system.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: May 31, 2005
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Barbara Haviland Minor
  • Patent number: 6852684
    Abstract: Disclosed are non-flammable, high-solvency compositions having utility as cleaning agents in the electronics and refrigeration industries, and as a medium for mold release agents. The compositions are non-flammable by Flame Extension Test ASTM D-3065 and Flash Point-Tag Closed Cup Test ASTM D-56-82, and have a Kauri Butanol value of at least about 40 by ASTM 1133-94. The compositions comprise the components: a.) trans-1,2-dichloroethylene; and b.) solvent selected from: i.) oxygen-containing solvents selected from alcohols, ketones, esters, siloxanes, and ethers; and ii.) hydrocarbon solvents represented by CtH2t+2 or CtH2t, wherein t is from 4 to 8; and c.) an inerting agent selected from: i.) hydrofluorocarbon inerting agents represented by the formula CxHyF(2x+2?y), wherein x is from 3 to 8, y is from 1 to 4, and the mole ratio of F/H in the hydrofluorocarbon inerting agent is greater than 1.6; ii.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: February 8, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Greg A. Westbrook, Thomas L. Tattersall, Mark C. Wolff
  • Patent number: 6846792
    Abstract: Refrigerant compositions include mixtures of difluoromethane and isobutane, butane, propylene or cyclopropane; pentafluoroethane and propylene or cyclopropane; 1,1,2,2-tetrafluoroethane and propane; 1,1,1,2-tetrafluoroethane and cyclopropane; 1,1,1-trifluoroethane and DME or propylene; 1,1-difluoroethane and propane, isobutane, butane or cyclopropane; fluoroethane and propane or cyclopropane; 1,1,1,2,2,3,3-heptafluoropropane and butane, cyclopropane, DME, isobutane or propane; or 1,1,1,2,3,3,3-heptafluoropropane and butane, cyclopropane, isobutane or propane.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: January 25, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Barbara Haviland Minor, Donald Bernard Bivens, Brooks Shawn Lunger
  • Patent number: 6841088
    Abstract: The present invention relates to refrigerant compositions comprising a fluorocarbon, an oxygenated lubricant, a non-oxygenated lubricant, and a compatibilizer. The present invention further relates to methods for replacing a chlorofluorocarbon or hydrochlorofluorocarbon and a non-oxygenated lubricant composition with a fluorocarbon and an oxygenated lubricant composition in a compression refrigeration system without flushing residual non-oxygenated lubricant from the system.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: January 11, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Barbara Haviland Minor
  • Patent number: 6835321
    Abstract: This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2−bOc wherein a=2 or 3 and 3≦b≦8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2−m wherein 1≦n≦4 and 1≦m≦8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, 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: June 5, 2003
    Date of Patent: December 28, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Allen Capron Sievert
  • Patent number: 6830703
    Abstract: This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2−bOc wherein a=2 or 3 and 3≦b≦8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2−m wherein 1≦n≦4 and 1≦m≦8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, 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: June 5, 2003
    Date of Patent: December 14, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
  • Patent number: 6783691
    Abstract: The present invention relates to azeotrope-like compression refrigerant compositions consisting essentially of difluoromethane (HFC-32), pentafluoroethane (HFC-125), 1,1,1,2-tetrafluoroethane (HFC-134a) and 0.5-5 weight percent of a hydrocarbon selected from the group consisting of: n-butane; isobutane; n-butane and 2-methylbutane; n-butane and n-pentane; isobutane and 2-methylbutane; and isobutane and n-pentane.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: August 31, 2004
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Donald Bernard Bivens, Barbara Haviland Minor, Akimichi Yokozeki
  • Patent number: 6688118
    Abstract: This invention relates to compositions of cyclopentane, and a compound selected from the group consisting of hydrofluorocarbons, hydrofluoroethers, or fluorinated sulfur compounds. Specifically these compounds may be selected from the group consisting of tetrafluoroethane, hexafluoropropane, pentafluoropropane, tetrafluoropropane, trifluoropropane, difluoropropane, octafluorobutane, hexafluorobutane, pentafluorobutane, nonafluorobutane, difluorobutane, trifluoro-2-methoxyethane and bis(pentafluoroethyl)sulfide. The compositions, which may be azeotropic or azeotrope-like, may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, refrigerants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: February 10, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Barbara Haviland Minor
  • Patent number: 6641752
    Abstract: The present invention relates to the discovery of compositions which include fluoroethane, 2-fluoropropane or tert-butylfluoride. These compositions are useful as pure components or with at least one of tetrafluoroethane, difluoroethane, hexafluoropropane, a hydrocarbon or dimethylether. These compositions are useful as aerosol propellants, refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, 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: July 9, 2001
    Date of Patent: November 4, 2003
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Vinci Martinez Felix, Barbara Haviland Minor, Allen Capron Sievert
  • Patent number: 6632376
    Abstract: This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2−bOc wherein a=2 or 3 and 3≦b≦8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2−m wherein 1≦n≦4 and 1≦m≦8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, 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: April 19, 2002
    Date of Patent: October 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
  • Patent number: 6531441
    Abstract: Refrigerant compositions include mixtures of difluoromethane and isobutane, butane, propylene or cyclopropane; pentafluoroethane and propylene or cyclopropane; 1,1,2,2-tetrafluoroethane and propane; 1,1,1,2-tetrafluoroethane and cyclopropane; 1,1,1-trifluoroethane and DME or propylene; 1,1-difluoroethane and propane, isobutane, butane or cyclopropane; fluoroethane and propane or cyclopropane; 1,1,1,2,2,3,3-heptafluoropropane and butane, cyclopropane, DME, isobutane or propane; or 1,1,1,2,3,3,3-heptafluoropropane and butane, cyclopropane, isobutane or propane.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: March 11, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Barbara Haviland Minor, Donald Bernard Bivens, Brooks Shawn Lunger
  • Patent number: 6503417
    Abstract: Disclosed are ternary azeotropic, azeotrope-like, and zeotropic compositions of ammonia, pentafluoroethane and difluoromethane. These compositions are useful as refrigerants, and particularly as high capacity and efficiency alternatives to binary mixtures of difluoromethane and pentafluoroethane.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: January 7, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donald Bernard Bivens, Akimichi Yokozeki
  • Patent number: 6416683
    Abstract: This invention relates to compositions that include at least one fluoroether and at least one hydrofluorocarbon. Included in this invention are compositions of a cyclic or acyclic hydrofluoroether of the formula CaFbH2a+2−bOc wherein a=2 or 3 and 3≦b≦8 and c=1 or 2 and a hydrofluorocarbon of the formula CnFmH2n+2−m wherein 1≦n≦4 and 1≦m≦8. Such compositions may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, 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: April 16, 1998
    Date of Patent: July 9, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen E. C. Chisolm, Allen Capron Sievert
  • Patent number: 6254798
    Abstract: This invention relates to compositions that include nitrous oxide and at least one of trifluoromethane, difluoromethane, tetrafluoroethane, pentafluoroethane, perfluoroethane or ethane. These compositions are useful as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, aerosol propellants, heat transfer media, electronic gases, plasma etchants, 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: March 19, 1998
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company.
    Inventors: Barbara Haviland Minor, Donald Bernard Bivens, Clifford Keith Rice, James Richard Sand
  • Patent number: RE37938
    Abstract: The present invention relates to compositions of pentafluoropropane and a fluorinated propane having from 1 to 5 fluorine atoms; a hydrocarbon having from 1 to 5 carbon atoms; 1,1,1,4,4,4-hexafluorobutane, (CF3)2CHCH3, dimethyl ether; or 1,1,1,2,3,4,4,5,5,5-decafluoropentane. The compositions, which may be azeotropic or azeotrope-like, may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, refrigerants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particular removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: December 17, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Barbara Haviland Minor, Tuneen E. C. Chisolm