Patents by Inventor Richard S. Mitchell

Richard S. Mitchell 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 a mixture of methyl-substituted primary anilines
    Patent number: 4795833
    Abstract: A process is disclosed for preparing an isomeric mixture of methyl-substituted aniline comprising contacting at least one of said analines with a specified zeolite catalyst.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: January 3, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard S. Mitchell