Patents by Inventor Hajimu M. Kawa

Hajimu M. Kawa 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).

  • 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
  • Pyrolysis of perfluoropolyethers
    Patent number: 4894484
    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 can be obtained by taking appropriate distillation cuts.
    Type: Grant
    Filed: September 3, 1987
    Date of Patent: January 16, 1990
    Assignee: Exfluor Research Corporation
    Inventors: Richard J. Lagow, Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu M. Kawa