Patents by Inventor John W. Cornforth

John W. Cornforth 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).

  • Process for the preparation of 2,2-bis(3,5-di-t-butyl-4-hydroxyphenyl)propane
    Patent number: 4073815
    Abstract: A process for the preparation of 2,2-bis(3,5-di-t-butyl-4-hydroxyphenyl)propane by reacting isobutylene with diphenylolpropane in the presence of a substantially anhydrous aromatic sulfonic acid.
    Type: Grant
    Filed: October 19, 1976
    Date of Patent: February 14, 1978
    Assignee: Shell Oil Company
    Inventors: John W. Cornforth, John A. Schofield, Sidney J. French, Robin T. Gray