Patents by Inventor Edwin M. Maxey

Edwin M. Maxey 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).

  • Trimerization of aromatic isocyanates catalyzed by certain ammonium salts
    Patent number: 3980594
    Abstract: Quaternary ammonium salts or inorganic and organic oxygen acids having pK values (where pK is the negative log of the dissociation constant) for at least one of the dissociable hydrogen atoms equal to or greater than 2.0 in aqueous solution are employed as extremely efficient catalysts for trimerization of organic isocyanates, particularly aromatic isocyanates, to isocyanurates and for urethane formation.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: September 14, 1976
    Assignee: The General Tire & Rubber Company
    Inventors: Hubert J. Fabris, Edwin M. Maxey, Heinz Uelzmann