Patents by Inventor Herward A. Vogel

Herward A. Vogel 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).

  • Process for preparing perfluoroalkanesulfonyl fluorides
    Patent number: 5486271
    Abstract: A process for preparing perfluoroalkanesulfonyl fluorides, e.g., perfluoromethanesulfonyl fluoride, is described which comprises electrochemically fluorinating in the presence of anhydrous hydrogen fluoride mono-, di- or tri- alkylsulfonyl alkyl esters or amides, or mono-, bis- or tris- alkylsulfonyl alkanes or disulfones. The process can be used to prepare perfluoroalkanesulfonyl fluorides in good yield and can be both more electrically-efficient and more fluorine-efficient than the conventional preparative method involving the electrochemical fluorination of hydrocarbon alkanesulfonyl halides.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: January 23, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John C. Hansen, Herward A. Vogel