Patents by Inventor Thomas R. Bierschenk

Thomas R. Bierschenk 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).

  • Liquid-phase fluorination
    Patent number: 5753776
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 19, 1998
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
  • Liquid-phase fluorination
    Patent number: 5674949
    Abstract: This invention pertains to a method for liquid-phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 7, 1997
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Liquid phase fluorination
    Patent number: 5571870
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: November 5, 1996
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Fluorination of acetals, ketals and orthoesters
    Patent number: 5557012
    Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 17, 1996
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
  • Fluorination of acetals, ketals and orthoesters
    Patent number: 5543567
    Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 6, 1996
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
  • Perfluorinated polyethers
    Patent number: 5539059
    Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 23, 1996
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Fluorination of acetals, ketals and orthoesters
    Patent number: 5523496
    Abstract: Perfluoropolyethers and perhalogenated chlorofluoroether polymers are disclosed that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: June 4, 1996
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
  • Perfluorinates polyethers
    Patent number: 5506309
    Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 9, 1996
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhulke, Hajimu Kawa, Richard J. Lagow
  • Liquid phase fluorination
    Patent number: 5461117
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: October 24, 1995
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
  • Liquid-phase fluorination
    Patent number: 5332790
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: July 26, 1994
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Liquid-phase fluorination
    Patent number: 5322904
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: June 21, 1994
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
  • Liquid-phase fluorination
    Patent number: 5322903
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: June 21, 1994
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Fluorination of acetals, ketals and orthoesters
    Patent number: 5300683
    Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: April 5, 1994
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Fluorination of acetals, ketals and orthoesters
    Patent number: 5202480
    Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: April 13, 1993
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Perfluoropolyethers
    Patent number: 5202501
    Abstract: Perfluoropolyethers containing high concentrations of difluoromethylene oxide units in the polymer chain are disclosed.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: April 13, 1993
    Assignee: Exfluor Research Corporation
    Inventors: Richard J. Lagow, Thomas R. Bierschenk, Timothy J. Juhlke
  • Use of chlorofluoropolymers as lubricants for refrigerants
    Patent number: 5198139
    Abstract: This invention pertains to the use of chlorofluoropolymers, such as perfluoropolyepichlorohydrin as lubricants for cooling systems which employ hydrofluorocarbon refrigerants, such as 1,1,1,2-tetrafluoroethane.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: March 30, 1993
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Richard J. Lagow, Hajimi Kawa
  • Liquid phase fluorination
    Patent number: 5093432
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: March 3, 1992
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Fluorination of acetals, ketals and orthoesters
    Patent number: 5053536
    Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: October 1, 1991
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Perfluoropolyether solid fillers for lubricants
    Patent number: 5032302
    Abstract: Lubricants comprising perfluoropolyether oils containing perfluoropolyether solids as fillers are described.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: July 16, 1991
    Assignee: Exfluor Research Corporation
    Inventors: Timothy J. Juhlke, Thomas R. Bierschenk, Richard J. Lagow
  • Pyrolysis of perfluoropolyethers
    Patent number: 5025093
    Abstract: A method of breaking down perfluoropolyethers into lower molecular weight fragments by pyrolysis is disclosed. The perfluoropolyethers are pyrolyzed generally at above about 350.degree. C. Volatile lower molecular weight components are condensed and collected. Various molecular weight fractions and collected. Various molecular weight fractions can be obtained by taking appropriate distillation cuts.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: June 18, 1991
    Assignee: Exfluor Research Corporation
    Inventors: Richard J. Lagow, Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu M. Kawa