Patents Represented by Attorney Mark A. Edwards
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Patent number: 6991744Abstract: 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: GrantFiled: June 6, 2002Date of Patent: January 31, 2006Assignee: E. I. du Pont de Nemours and CompanyInventors: Walter Mahler, Leo Ernest Manzer
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Patent number: 6962665Abstract: 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: GrantFiled: December 6, 2001Date of Patent: November 8, 2005Assignee: E. I. du Pont de Nemours and CompanyInventor: Walter Mahler
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Patent number: 6951835Abstract: 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: GrantFiled: March 21, 2000Date of Patent: October 4, 2005Assignees: E.I. du Pont de Nemours and Company, Micro Care CorporationInventors: Barbara Haviland Minor, Melodie A. Schweitzer, Thomas L. Tattersall
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Patent number: 6932918Abstract: 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: GrantFiled: April 22, 2003Date of Patent: August 23, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Barbara Haviland Minor, Vinci Martinez Felix, Allen Capron Sievert
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Patent number: 6905630Abstract: 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: GrantFiled: June 18, 2004Date of Patent: June 14, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
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Patent number: 6899820Abstract: 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: GrantFiled: June 9, 2003Date of Patent: May 31, 2005Assignee: E. I. Du Pont de Nemours and CompanyInventor: Barbara Haviland Minor
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Patent number: 6852684Abstract: 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: GrantFiled: September 17, 1999Date of Patent: February 8, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Greg A. Westbrook, Thomas L. Tattersall, Mark C. Wolff
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Patent number: 6846792Abstract: 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: GrantFiled: December 20, 2002Date of Patent: January 25, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Barbara Haviland Minor, Donald Bernard Bivens, Brooks Shawn Lunger
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Patent number: 6841088Abstract: 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: GrantFiled: October 15, 2003Date of Patent: January 11, 2005Assignee: E. I. du Pont de Nemours and CompanyInventor: Barbara Haviland Minor
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Patent number: 6835321Abstract: 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: GrantFiled: June 5, 2003Date of Patent: December 28, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Allen Capron Sievert
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Patent number: 6830703Abstract: 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: GrantFiled: June 5, 2003Date of Patent: December 14, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
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Patent number: 6783691Abstract: 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: GrantFiled: March 20, 2000Date of Patent: August 31, 2004Assignee: E.I. du Pont de Nemours and CompanyInventors: Donald Bernard Bivens, Barbara Haviland Minor, Akimichi Yokozeki
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Patent number: 6688118Abstract: 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: GrantFiled: March 1, 1996Date of Patent: February 10, 2004Assignee: E. I. du Pont de Nemours and CompanyInventor: Barbara Haviland Minor
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Patent number: 6641752Abstract: 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: GrantFiled: July 9, 2001Date of Patent: November 4, 2003Assignee: E. I. Du Pont De Nemours and CompanyInventors: Vinci Martinez Felix, Barbara Haviland Minor, Allen Capron Sievert
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Patent number: 6632376Abstract: 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: GrantFiled: April 19, 2002Date of Patent: October 14, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen Chisolm-Carter, Allen Capron Sievert
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Patent number: 6531441Abstract: 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: GrantFiled: August 27, 1999Date of Patent: March 11, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Barbara Haviland Minor, Donald Bernard Bivens, Brooks Shawn Lunger
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Patent number: 6503417Abstract: 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: GrantFiled: April 12, 1999Date of Patent: January 7, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Donald Bernard Bivens, Akimichi Yokozeki
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Patent number: 6416683Abstract: 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: GrantFiled: April 16, 1998Date of Patent: July 9, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Diana Lynn Klug, Barbara Haviland Minor, Donna Marie Patron, Tuneen E. C. Chisolm, Allen Capron Sievert
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Patent number: 6254798Abstract: 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: GrantFiled: March 19, 1998Date of Patent: July 3, 2001Assignee: E. I. du Pont de Nemours and Company.Inventors: Barbara Haviland Minor, Donald Bernard Bivens, Clifford Keith Rice, James Richard Sand
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Patent number: RE37938Abstract: 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: GrantFiled: May 26, 1999Date of Patent: December 17, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Barbara Haviland Minor, Tuneen E. C. Chisolm