Patents by Inventor Sandra R. Evans

Sandra R. Evans 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).

  • Use of coated catalysts in the preparation of maleic anhydride
    Patent number: 4097501
    Abstract: Very desirable temperature control and selectivity are obtained in the oxidation of benzene to maleic anhydride using an oxidation catalyst of an essentially inert support of at least 20 microns containing on its outer surface a coating of a catalytically active oxide material or a catalytically active oxide material and an oxide support.
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: June 27, 1978