Patents by Inventor Adrian J. Vieth

Adrian J. Vieth 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 manufacture of beta-isophorone
    Patent number: 5276197
    Abstract: The invention is concerned with a process for the manufacture of beta-isophorone from alpha-isophorone by converting alpha-isophorone into beta-isophorone in the presence of a heterogeneous catalyst in the gas phase. The heterogenous catalyst used is especially an oxide or mixed oxide of the elements Mg, Al, Si and Ni.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: January 4, 1994
    Assignee: Hoffman-La Roche Inc.
    Inventors: Paul Nosberger, Adrian J. Vieth