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:
Nov. 13, 2001
Filed:
Feb. 04, 2000
Applicant:
Inventors:
Patrick Joseph McCloskey, Watervliet, NY (US);
Timothy Brydon Burnell, Niskayuna, NY (US);
Paul Michael Smigelski, Jr., Schenectady, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 6/400 ;
U.S. Cl.
CPC ...
C08G 6/400 ;
Abstract
This invention relates to a method for the preparation of polycarbonate by the melt process comprising reacting a diphenol and a diarylcarbonate in the presence of a catalyst system comprising a catalytically effective amount of an alkali and/or alkali earth metal salt of a non volatile acid and a base.