The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 1994
Filed:
Nov. 12, 1993
Jeffrey S Salek, Oakdale Borough, PA (US);
Joseph Pugach, Monroeville Borough, PA (US);
Mark R Rubino, Municipality of Monroeville, PA (US);
Aristech Chemical Corporation, Pittsburgh, PA (US);
Abstract
A process for making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane via the acid catalyzed reaction of phenol and 3,3,5-trimethylcyclohexanone containing an organic thiol co-catalyst is described wherein the organic thiol is rejuvenated by treatment with a halogen acid and recycled to a fresh mixture of phenol and 3,3,5-trimethylcyclohexanone to make additional 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile