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:
Apr. 07, 2009
Filed:
Feb. 17, 2005
Yasuhiro Ishikawa, Chiba, JP;
Koichi Suga, Chiba, JP;
Yoshio Ikeda, Chiba, JP;
Masatoshi Saitou, Chiba, JP;
Yasuhiro Ishikawa, Chiba, JP;
Koichi Suga, Chiba, JP;
Yoshio Ikeda, Chiba, JP;
Masatoshi Saitou, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A method for producing a polycarbonate copolymer having structural repeating units represented by formulas (I) and (II): wherein each of Rand R, X, R, R, Y, a to d and n are defined in the application by reacting (A) a dihydric phenol, (B) a phenol-modified diol and (C) a carbonate precursor, wherein the phenol-modified diol is contains 500 ppm by mass or less of a hydroxybenzoic acid.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile