Patents Represented by Attorney William D. Mitchell

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  • Dry wire drawing lubricants
    Patent number: 5593956
    Abstract: Shaped, dust-free dry wire drawing compound lubricants having at least one reproducibly controlled dimension and methods for their preparation comprising the steps of conglutinating and pressure forming the lubricant composition.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: January 14, 1997
    Assignee: Elf Atochem North America, Inc.
    Inventor: David P. Gzesh
  • Inhibition of 141B decomposition
    Patent number: 5567281
    Abstract: Inhibition of the formation of unsaturated carbon compounds during the heating of 141b involving the addition of various inhibitors such as butylene oxide and/or the use of a vessel made of a nickel alloy.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 22, 1996
    Assignee: Elf Atochem North America, Incorporated
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, Anthony D. Kelton, Morris P. Walker, Danny W. Wright
  • Radiation-shielding polymeric compositions
    Patent number: 5556898
    Abstract: Radiation resistant, gadolinium oxide modified, thermoplastic polymers which may be used for containing nuclear waste.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: September 17, 1996
    Assignee: ELF Atochem North America, Inc.
    Inventors: Leo T. Hutton, David J. Lavanga
  • Cold cleaning solvents
    Patent number: 5552080
    Abstract: Nonazeotropic solvent blends useful for cold cleaning applications in an open environment containing an HCFC, HFC or PFC component having no flash point (such as 141b), a higher boiling nonflammable chlorinated solvent (such as perchloroethylene), and a moderately flammable, intermediate boiling, oxygenated organic solvent (such as n-butanol).
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: September 3, 1996
    Assignee: Elf Atochem North America, Inc.
    Inventor: Michael S. Bolmer
  • Paint strippers process
    Patent number: 5542986
    Abstract: Aqueous paint stripper formulations containing a solvent system comprised of an ester such as benzyl formate and methods for using the same to strip paint.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: August 6, 1996
    Assignee: Elf Atochem North America, Inc.
    Inventor: John Distaso
  • Inhibition of 141B decomposition
    Patent number: 5531867
    Abstract: Inhibition of the formation of unsaturated carbon compounds during the heating of 141b involving the addition of various inhibitors such as butylene oxide and/or the use of a vessel made of a nickel alloy.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: July 2, 1996
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, Anthony D. Kelton, Morris P. Walker, Danny W. Wright
  • Cold cleaning process
    Patent number: 5514221
    Abstract: Evaporative cold cleaning of objects wherein the object is contacted in an open environment with a nonazeotropic solvent blend containing an HCFC, HFC or PFC component having no flash point (such as 141b), a higher boiling nonflammable chlorinated solvent (such as perchloroethylene), and a moderately flammable, intermediate boiling, oxygenated organic solvent (such as n-butanol).
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: May 7, 1996
    Assignee: Elf Atochem North America, Inc.
    Inventor: Michael S. Bolmer
  • Methylbenzyl formate paint strippers
    Patent number: 5405548
    Abstract: Aqueous paint stripper formulations containing a solvent system comprised of an ester such as benzyl formate and methods for using the same to strip paint.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: April 11, 1995
    Assignee: Elf Atochem North America Inc.
    Inventor: John Distaso
  • Water in oil emulsions
    Patent number: 5387363
    Abstract: Retardation of the rate of evaporation of water in oil emulsions by incorporating in the organic phase thereof an effective amount of paraffin wax.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: February 7, 1995
    Assignee: Elf Atochem North America, Inc.
    Inventor: John Distaso
  • Etchant/deoxidizer for aluminum
    Patent number: 5271804
    Abstract: In the etching and deoxidizing of aluminum, suppression of aluminum oxyfluoride crystal formation by the incorporation of phosphoric acid into an etchant/deoxidizer solution containing water, ferric sulfate, nitric acid, and HF or fluoride salts.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: December 21, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Frank A. Muller, David J. Tomlinson
  • Stabilized 141B
    Patent number: 5246625
    Abstract: Storage-stable 141b prepared by contacting 141b with alumina at temperatures of about 0-100 degrees Centigrade, compositions containing the thus treated 141b, and uses thereof for the production of polyurethane and polyisocyanurate foams.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: September 21, 1993
    Assignee: EH Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh
  • Stabilized 141b
    Patent number: 5246626
    Abstract: Storage-stable 141b prepared by contacting 141b with alumina at temperatures of about 0-100 degrees Centigrade, compositions containing the thus treated 141b, and uses thereof for the production of polyurethane and polyisocyanurate foams.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: September 21, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh
  • 1-Heterocyclic alkyl-1,2,3,4-tetrahydroquinazolinones
    Patent number: 4085107
    Abstract: 1-Heterocyclic alkyl-1,2,3,4-tetrahydroquinazolinones, acid addition salts thereof, and intermediate compounds having analgesic properties. A representative quinazolinone compound is 1-[2-(1-phenyl-4-piperazinyl)-ethyl]-2-phenyl-1,2,3,4-tetrahydro-4-quinazo linone. A representative analgesic intermediate is 2-[2-(4-[1-phenyl]piperazinyl) ethylamino] benzamide.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: April 18, 1978
    Assignee: Pennwalt Corporation
    Inventor: Bola Vithal Shetty
  • 1-Heterocyclic alkyl-1,2,3,4-tetrahydroquinazolinones and analgesic intermediates thereof
    Patent number: 4060526
    Abstract: 1-heterocyclic alkyl-1,2,3,4-tetrahydroquinazolinones, acid addition salts thereof, and intermediate compounds having analgesic properties. A representative quinazolinone compound is 1-[2-(1-phenyl-4-piperazinyl)-ethyl]-2-phenyl-1,2,3,4-tetrahydro-4-quinazo linone. A representative analgesic intermediate is 2-[2-(4-[1-phenyl]piperazinyl)ethylamino]benzamide.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: November 29, 1977
    Assignee: Pennwalt Corporation
    Inventor: Bola Vithal Shetty