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:
Sep. 11, 2001
Filed:
Oct. 07, 1999
Applicant:
Inventors:
Noriyoshi Ogawa, Toyonaka, JP;
Takahiro Adachi, Toyonaka, JP;
Mitsuhiko Masumoto, Toyonaka, JP;
Noriaki Honda, Toyonaka, JP;
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G 6/400 ;
U.S. Cl.
CPC ...
C08G 6/400 ;
Abstract
A branched polycarbonate resin having a viscosity average molecular weight (Mv) of 15,000 to 45,000, number of dichloromethane insoluble gel like particle with a particle diameter more than 50 &mgr;m being 10 or below per 100 g of the resin, obtained by reacting bisphenol, trihydric or above phenol as branching agent, monohydric phenol as molecular weight modifier and phosgene in the presence of both an alkali aqueous solution and organic solvent to polymerize and a process for producing the same.