Patents by Inventor Eberhard Prinz

Eberhard Prinz 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).

  • Bis(hydroxy-di-tert.butylphenyl)-alkanoic acid esters
    Patent number: 4052364
    Abstract: Bis(hydroxyphenyl)-alkanoic acid esters the phenyl radicals of which are alkylated twice are prepared by alkylation of corresponding compounds carrying one alkyl radical at the nucleus, using isobutylene as alkylating agent. The alkanoic acid esters are obtained in crystalline form and are suitable as stabilizers for polyolefins.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: October 4, 1977
    Assignees: Nobel Hoechst Chimie, Hoechst Aktiengesellschaft
    Inventors: Yani Christidis, Otto Mauz, Eberhard Prinz