Patents by Inventor Philip R. Ruby

Philip R. Ruby 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 esterifying 3,5-di-tert-butyl-4-hydroxybenzoic acid
    Patent number: 4528395
    Abstract: A process for making C.sub.8 -C.sub.20 alkyl esters by esterification of 3,5-di-tert-butyl-4-hydroxybenzoic acid with a C.sub.8 -C.sub.20 alcohol. The esterification reaction is conducted at 110.degree.-150.degree. C. in the presence of 5-20 weight percent based on the weight of 3,5-di-tert-butyl-4-hydroxybenzoic acid, of a strongly acidic gel-type ion-exchange resin catalyst having less than about 8 percent cross-linking.
    Type: Grant
    Filed: August 15, 1983
    Date of Patent: July 9, 1985
    Assignee: American Cyanamid Co.
    Inventors: Richard F. Beidler, Philip R. Ruby