Patents by Inventor David R. Dubois

David R. Dubois 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 preparing p-arylaminophenols with aluminum sulfate or carboxylate
    Patent number: 4148823
    Abstract: Process for the preparation of a p-arylaminophenol by reacting hydroquinone with a primary arylamino in the presence of a catalytic amount of aluminum sulfate or an aluminum lower carboxylate.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: April 10, 1979
    Assignee: Eastman Kodak Company
    Inventor: David R. Dubois