Patents by Inventor P. Douglas Hann

P. Douglas Hann 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).

  • Isoamylenes from butenes
    Patent number: 4085158
    Abstract: A feed of mixed butenes is separated by molecular sieves into a butene-1 stream and a stream comprising butenes-2 and isobutene. The butenes-2 and isobutene are disproportionated to yield isoamylenes. The isoamylenes can be converted to isoprene.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: April 18, 1978
    Assignee: Phillips Petroleum Company
    Inventors: Rolland E. Dixon, P. Douglas Hann