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:
Oct. 26, 2010
Filed:
May. 04, 2006
Applicants:
Stephen W. Fetsko, Hingham, MA (US);
Steven D. Evitt, Somerville, MA (US);
Inventors:
Stephen W. Fetsko, Hingham, MA (US);
Steven D. Evitt, Somerville, MA (US);
Assignee:
Badger Licensing LLC, Cambridge, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C 37/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane added to the reaction system in certain specific locations, and reacting the ingredients within the reaction zone in the presence of an acid catalyst.