Patents by Inventor Walter K. Dean

Walter K. Dean 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 ortho dealkylation of aromatic amines
    Patent number: 4405812
    Abstract: Ortho-methyl groups are preferentially removed from o-methyl substituted aromatic amines by contacting with a nickel catalyst at about 200.degree.-400.degree. C.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: September 20, 1983
    Assignee: Ethyl Corporation
    Inventors: Walter K. Dean, Bernard R. Meltsner