Patents by Inventor Robert M. Stickel

Robert M. Stickel 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).

  • Manufacture of diphenylamine
    Patent number: 4454348
    Abstract: Diphenylamine is made by the reaction in the vapor phase of two moles of aniline with the consequent evolution of ammonia; surprisingly high yields and selectivities are obtained by maintaining a significant concentration of ammonia in the catalyst zone, preferably by using the ammonia as a carrier for the aniline.
    Type: Grant
    Filed: October 13, 1982
    Date of Patent: June 12, 1984
    Assignee: United States Steel Corporation
    Inventors: John E. Aiken, Marvin C. Fields, Robert M. Stickel