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:
Oct. 22, 2002
Filed:
Jul. 11, 2001
Toshikatsu Furunaga, Tokyo, JP;
Tadasu Sato, Tokyo, JP;
Space Environmental Technology Company, Inc,, Tokyo, JP;
Abstract
A polycarbonate resin reduced in the release of environmental hormones which comprises structural units represented by general formula (A) and structural units represented by general formula (B), the structural units represented by general formula (A) accounting for 5 to 90 mol % of all the structural units, and which has an intrinsic viscosity of 0.30 to 0.60 dl/g. The polycarbonate resin is produced through the copolymerization of a bispenol whose ability to link to estrogen acceptors is low with an aliphatic dihydroxy compound. The resin hence has the basic properties inherent in polycarbonates, i.e. mechanical strength and heat resistance, and is reduced in the release of environmental hormones.