Patents by Inventor Paul M. Zema

Paul M. Zema 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).

  • Dimeric carbonylation of 1,3-butadiene
    Patent number: 4269781
    Abstract: This invention involves a process for dimeric carbonylation of 1,3-butadiene in the presence of an alkanol and a palladium-phosphine complex catalyst to yield alkyl nonadienoate.An important aspect of the invention process is the recovery of a separate alkanol-rich liquid phase which contains the catalyst in a highly reactive form suitable for recycle.
    Type: Grant
    Filed: February 8, 1980
    Date of Patent: May 26, 1981
    Assignee: Celanese Corporation
    Inventors: Thomas H. Vanderspurt, Paul M. Zema