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. 18, 1995
Filed:
Apr. 14, 1994
Applicant:
Inventors:
Tatsuya Kanno, Hyogo, JP;
Yutaka Fukuda, Hyogo, JP;
Assignee:
Daicel Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528198 ; 528196 ; 528199 ;
Abstract
A process for the preparation of a substantially chlorine-free, high-molecular-weight, colorless and transparent (co)polycarbonate by melt-polycondensing a dihydroxy compound with a carbonic diester, which comprises using a carbonic diester which satisfies at lease one factor selected from the group consisting of: