Patents by Inventor David R. Scharf

David R. Scharf 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).

  • Cracking process
    Patent number: 4396496
    Abstract: Antimony compounds are employed to reduce catalyst attrition and improve catalyst performance in catalytic cracking units, especially in conjunction with strontium compounds.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: August 2, 1983
    Assignee: Phillips Petroleum Company
    Inventors: David R. Scharf, Earl H. Gray
  • Postcard form for maintaining privacy of information contained thereon
    Patent number: D495736
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: September 7, 2004
    Inventor: David R. Scharf