Patents by Inventor David John Williams

David John Williams 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: 6689822
    Abstract: This invention provides azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and water that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: February 10, 2004
    Assignee: AlliedSignal Inc.
    Inventors: Leslie Bruce Bement, Mary Charlotte Bogdan, Clayton Herbert Carson, Peter Brian Logsdon, Hang Thanh Pham, Rajiv Ratna Singh, Hsueh Sung Tung, Ronald Riegal, David John Williams, Kevin Donald Uhrich
  • Publication number: 20030230274
    Abstract: A lubrication system for an engine including a sump for lubricant, a main pump operable to pump lubricant to first lubrication positions within the engine, and an auxiliary lubricant pump also operable to pump lubricant to second lubrication positions within the engine and wherein the auxiliary pump is an electrically driven pump which is controlled by a system controller the output of the auxiliary pump being controlled according to engine operating conditions, the main pump in use, pumping lubricant to the first lubrication positions within the engine along a main lubricant feed line, and the auxiliary pump when operated pumping lubricant to the second lubrication positions within the engine along an auxiliary feed line, and wherein the main and auxiliary feed lines, are connected via a communication passage which includes a closeable communication valve, the communication valve when closed preventing the flow of lubricant from the auxiliary feed line to the first lubrication positions, and when open permit
    Type: Application
    Filed: May 13, 2003
    Publication date: December 18, 2003
    Inventors: David John Williams, David Thomas Black
  • Publication number: 20030225177
    Abstract: The invention relates to integral skin foams and in particular to integral skin foams that are prepared using 1,1,1,3,3-pentafluoropropane (HFA-245fa) alone or in combination with water as the blowing agent. The foams exhibit physical characteristics such as resistance to abrasion and cracking on flex comparable to conventional chlorinated fluorocarbon blown foams. The foams of the present invention are suitable for use in many applications including, for example, shoe soles.
    Type: Application
    Filed: January 31, 2003
    Publication date: December 4, 2003
    Inventors: Peter Brian Logsdon, David John Williams, Mary Charlotte Bogdan, Kevin Donald Uhrich
  • Patent number: 6589444
    Abstract: The present invention relates to novel compositions of drying agents of superabsorbent polymers, molecular sieves and mixtures thereof and binders of polyurethane foam, polyisocyanurate foam and supports comprising cellulose and a method for separating, drying and/or filtering chemical mixtures. The composition and method of the invention have broad applicability. They may be used for example to remove water from chemical mixtures like refrigerants (e.g., in vehicular refrigeration systems), air (e.g., in vehicular braking systems), natural gas and cleaning solvents (e.g., used in semiconductor manufacture and pipeline cleaning).
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: July 8, 2003
    Assignee: Honeywell International Inc.
    Inventors: Raymond Hilton Percival Thomas, Roy Philip Robinson, David John Williams, Peter Brian Logsdon
  • Patent number: 6514928
    Abstract: This invention provides azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and water that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: February 4, 2003
    Assignee: AlliedSignal Inc.
    Inventors: Leslie Bruce Bement, Mary Charlotte Bogdan, Clayton Herbert Carson, Peter Brian Logsdon, Hang Thanh Pham, Rajiv Ratna Singh, Hsueh Sung Tung, Ronald Riegal, David John Williams, Kevin Donald Uhrich
  • Patent number: 6500359
    Abstract: This invention provides compositions of 1,1,1,3,3-pentafluoropropane, water and at least one hydrocarbon selected from the group consisting of n-pentane, isopentane, cyclopentane and hexane that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: December 31, 2002
    Assignee: Honeywell International Inc.
    Inventors: Leslie Bruce Bement, Mary Charlotte Bogdan, Peter Brian Logsdon, Hang Thanh Pham, Ronald Riegal, David John Williams, Kevin Donald Uhrich
  • Patent number: 6451867
    Abstract: The invention relates to mixtures of 1,1,1,3,3-pentafluoropropane and 1,1,1,3,3-pentafluorobutane. The blends are useful as blowing agents for polymer foam, solvents, aerosol propellants and heat transfer media.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: September 17, 2002
    Assignee: Honeywell International Inc.
    Inventors: Mary Charlotte Bogdan, David John Williams, Leslie Bruce Bement, Ronald Riegal
  • Publication number: 20020128337
    Abstract: The invention relates to integral skin foams and in particular to integral skin foams that are prepared using 1,1,1,3,3-pentafluoropropane (HFA-245fa) alone or in combination with water as the blowing agent. The foams exhibit physical characteristics such as resistance to abrasion and cracking on flex comparable to conventional chlorinated fluorocarbon blown foams. The foams of the present invention are suitable for use in many applications including, for example, shoe soles.
    Type: Application
    Filed: September 27, 2001
    Publication date: September 12, 2002
    Inventors: Peter Brian Logsdon, David John Williams, Mary Charlotte Bogdan, Kevin Donald Uhrich
  • Patent number: 6414046
    Abstract: The invention relates to polyurethane and polyisocyanurate closed-cell foams. More particularly, the invention relates to polyurethane and polyisocyanurate closed-cell foams prepared with a blowing agent comprising 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) and 1,1-dichloro-1-fluoroethane (HCFC-141b). Foams prepared with the blowing agent of the invention possess improved thermal performance.
    Type: Grant
    Filed: September 4, 2001
    Date of Patent: July 2, 2002
    Assignee: Honeywell International Inc.
    Inventors: Mary Charlotte Bogdan, Leslie Bruce Bement, Peter Brian Logsdon, David John Williams
  • Publication number: 20020072548
    Abstract: The invention relates to polyurethane and polyisocyanurate closed-cell foams. More particularly, the invention relates to polyurethane and polyisocyanurate closed-cell foams prepared with a blowing agent comprising 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) and 1,1-dichloro-1-fluoroethane (HCFC-141b). Foams prepared with the blowing agent of the invention possess improved thermal performance.
    Type: Application
    Filed: September 4, 2001
    Publication date: June 13, 2002
    Inventors: Mary Charlotte Bogdan, Leslie Bruce Bement, Peter Brian Logsdon, David John Williams
  • Publication number: 20020040070
    Abstract: Premixes of a polyol suitable for polyurethane or polyisocyanurate foam preparation and 1,1,1,3,3-pentafluoropropane require no stabilizer to inhibit reaction between the fluorocarbon and the polyol. These premixes are useful for polyurethane and polyisocyanurate foam preparation.
    Type: Application
    Filed: July 25, 1997
    Publication date: April 4, 2002
    Inventors: MARY CHARLOTTE BOGDAN, DENNIS PAUL KONOPA, DAVID JOHN WILLIAMS, ROBERT CHRISTIAN PARKER
  • Patent number: 6288135
    Abstract: This invention provides compositions of 1,1,1,3,3-pentafluoropropane, water and at least one hydrocarbon selected from the group consisting of n-pentane, isopentane, cyclopentane and hexane that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: September 11, 2001
    Assignee: AlliedSignal Inc.
    Inventors: Leslie Bruce Bement, Mary Charlotte Bogdan, Peter Brian Logsdon, Hang Thanh Pham, Ronald Riegal, David John Williams, Kevin Donald Uhrich
  • Publication number: 20010014707
    Abstract: The present invention relates to novel compositions of drying agents of superabsorbent polymers, molecular sieves and mixtures thereof and binders of polyurethane foam, polyisocyanurate foam and supports comprising cellulose and a method for separating, drying and/or filtering chemical mixtures. The composition and method of the invention have broad applicability. They may be used for example to remove water from chemical mixtures like refrigerants (e.g., in vehicular refrigeration systems), air (e.g., in vehicular braking systems), natural gas and cleaning solvents (e.g., used in semiconductor manufacture and pipeline cleaning).
    Type: Application
    Filed: April 4, 2001
    Publication date: August 16, 2001
    Inventors: Raymond Hilton Percival Thomas, Roy Philip Robinson, David John Williams, Peter Brian Logsdon
  • Patent number: 6100230
    Abstract: This invention provides compositions of 1,1,1,3,3-pentafluoropropane, water and at least one hydrocarbon selected from the group consisting of n-pentane, isopentane, cyclopentane and hexane that are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: August 8, 2000
    Assignee: AlliedSignal Inc.
    Inventors: Leslie Bruce Bement, Mary Charlotte Bogdan, Peter Brian Logsdon, Hang Thanh Pham, Ronald Riegal, David John Williams, Kevin Donald Uhrich
  • Patent number: 4092478
    Abstract: A dyestuff of the formula: ##STR1## wherein D is the residue of a colored compound of the 6,13-dichlorotriphendioxazine series, the triazine group being attached to a nitrogen atom in D, and wherein:Y is 1 or 2,R.sub.2 is Cl, Br, OH, lower alkoxy, NH.sub.2, a quaternary ammonium group or the residue of a primary or secondary amine,R.sub.1 is H or an alkyl or substituted alkyl group of up to 4 carbon atoms, andR is a hydrocarbon or substituted hydrocarbon radical.The invention provides a range of blue dyestuffs especially useful for reactively dyeing cellulose by heating in the presence of a carbodiimide.
    Type: Grant
    Filed: December 21, 1976
    Date of Patent: May 30, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: David William Plant, David John Williams