Patents by Inventor David L. Wenstrup

David L. Wenstrup 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 preparing 2-(2,2-dicyclohexylethyl)piperidine
    Patent number: 4191828
    Abstract: 2-(2,2-Dicyclohexylethyl)piperidine is prepared via the catalytic hydrogenation of 2-(2,2-diphenylethenyl)pyridine in a single step. High yields are obtained using a rhodium supported catalyst.
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: March 4, 1980
    Assignee: Richardson-Merrell Inc.
    Inventors: Stephen W. Horgan, Frank P. Palopoli, David L. Wenstrup