Patents by Inventor Frans W. Tazelaar

Frans W. Tazelaar 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).

  • Lengthened difunctional perfluoropolyether oils and rubbers prepared therewith
    Patent number: 5677406
    Abstract: The invention relates to a difunctional perfluoropolyether oil, prepared by reacting a perfluoropolyether diol oil having a weight average molecular weight (Mw) of 1500 to 3000 with a chain lengthener selected from the group consisting of diacid chlorides and difunctional diisocyanates, and to perfluoropolyether rubbers prepared from these chain-lengthened oils.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: October 14, 1997
    Assignee: Oce-Nederland, B.V.
    Inventors: Frans W. Tazelaar, Peter R. Markies, Johannes A. van den Reek, Cornelius J.M. van der Stappen