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:
Jan. 22, 1985
Filed:
Mar. 11, 1983
Sota Kawakami, Hachioji, JP;
Hideki Murata, Akishima, JP;
Satoshi Matsunaga, Hino, JP;
Toshihiko Kiriki, Hachioji, JP;
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Abstract
An optical element including an optical resin composition consisting essentially of a polycarbonate is disclosed. Said optical resin composition have a melt flow rate of more than or equal to 5.0 g/10 min. as measured based on ISO R-1133 Standard under the condition of 230.degree. C. and 5 kgf. and have a glass transition point of more than or equal to 100.degree. C. Said polycarbonate include a major repeating unit represented by the formula (I) or (II). ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represent an arylene group or a cycloalkylene group; R represents an alkylene group, a cycloalkylene group, --O--, --O--Ar.sub.3 --O--, --S--, --SO--, --SO.sub.2 --, --SO.sub.2 --Ar.sub.3 --SO.sub.2 --, --R.sub.1 --Ar.sub.4 --R.sub.1 --, --O--R.sub.1 --O--, ##STR2## --CONH--R.sub.1 --NHCO--, or --Ar.sub.5 --R.sub.1 --; Ar.sub.3 and Ar.sub.4 each represent a phenylene group or a bisphenylene group; R.sub.1 represents an alkylene group; R.sub.2 represents an alkyl group; Ar.sub.5 represents a cycloalkylene group, --R.sub.1 --Ar.sub.4 --R.sub.1 --, --R.sub.1 --Ar.sub.5 --R.sub.1 --, --R.sub.1 --O--Ar.sub.4 --O--R.sub.1 --, or --R.sub.1 --O--Ar.sub.4 --X--Ar.sub.4 --O--R.sub.1 ; and X represents --SO.sub.2 --, --CO--, an alkylene group, or --R.sub.1 --Ar.sub.4 --R.sub.1 --.