Patents by Inventor Klaus M. Diedrich

Klaus M. Diedrich 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).

  • Anionic paper surface sizing agent
    Patent number: 4200559
    Abstract: Paper surface sizing agents based on aqueous solutions ofcopolymers of maleic acid anhydride and dicyclopentadiene, which are further reacted after preparation to produce the half amides with ammonia, or primary or secondary aliphatic amines.
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: April 29, 1980
    Assignee: Chemische Werke Huls A.G.
    Inventors: Karl Peterlein, Felix Schulde, Klaus M. Diedrich, Volker W. Kulisch