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, 1991
Filed:
Dec. 21, 1988
Applicant:
Inventors:
Akihiro Kobayashi, Hitachi, JP;
Toshiyuki Fujita, Hitachi, JP;
Takayuki Saito, Hitachi, JP;
Hiromasa Kawai, Ichihara, JP;
Yutaka Hosoi, Mito, JP;
Hideaki Shibata, Chiba, JP;
Assignee:
Hitachi Chemical Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C / ; C08F / ;
U.S. Cl.
CPC ...
3511 / ; 350409 ; 360135 ; 346137 ; 369288 ; 526262 ; 526282 ;
Abstract
An optical resin material comprising a polymer containing as an essential component at least one norbornyl acrylate or methacrylate or a derivative thereof is excellent in properties, particularly in moisture resistance and can be used for molding optical elements such as lenses, optical discs, etc.