Patents by Inventor Richard D. Partos

Richard D. Partos 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).

  • Method of inhibiting polymerization of vinyl aromatic compounds
    Patent number: 4376678
    Abstract: Disclosed is a method of distilling readily polymerizable vinyl aromatic compounds such as styrene, .alpha.-methyl styrene, vinyl toluenes and divinylbenzenes wherein 2,2-bis(3,5-dinitro-4-hydroxy-phenyl)propane is used as a polymerization inhibitor. The invention is particularly useful for the distillation of divinylbenzene.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: March 15, 1983
    Assignee: American Hoechst Corporation
    Inventor: Richard D. Partos