Patents by Inventor Friedrich E. Neumann

Friedrich E. Neumann 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 bisphenols
    Patent number: 4053522
    Abstract: A process and catalyst for the preparation of bisphenols is disclosed. The process involves contacting a phenol with a ketone in the presence of a solid perfluorinated polymer catalyst having pendent sulfonic acid groups which are partially neutralized with a mercaptoamine.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: October 11, 1977
    Assignee: Shell Oil Company
    Inventors: James D. McClure, Friedrich E. Neumann