Patents by Inventor J. Bruce Warner

J. Bruce Warner 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).

  • Preparation of N-acetyl-p-aminophenol
    Patent number: 4670589
    Abstract: Production of N-acetyl-p-aminophenol by hydrogenation of p-nitrophenol to p-aminophenol and concurrently acetylating the p-aminophenol with acetic anhydride with the acetylation controlled so that substantially no excess acetic anhydride is present in the system until the hydrogenation reaction has reached substantial completion.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: June 2, 1987
    Assignee: Monsanto Company
    Inventors: John H. Van Ness, J. Bruce Warner