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:
Jul. 31, 2001
Filed:
Nov. 02, 1999
Applicant:
Inventors:
Thomas Joseph Fyvie, Schenectady, NY (US);
James Manio Silva, Clifton Park, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 6/401 ;
U.S. Cl.
CPC ...
C08G 6/401 ;
Abstract
This invention relates to a process for the preparation of hydroxyaromatic chloroformate products suitable for use as chainstopping or endcapping agents. The process involves a semi-batch process in which an aqueous caustic solution is introduced into a vessel comprising a precharge solution, and careful control of the overall molar ratios of phosgene, caustic and hdyroxyaromatic compound are maintained.