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:
May. 29, 1990
Filed:
Jul. 11, 1988
Rikizo Kobashi, Nishinomiya, JP;
Shigeyuki Takase, Nishinomiya, JP;
Hiroyuki Enomoto, Nishinomiya, JP;
Yasushi Hayasaki, Nishinomiya, JP;
Toyohisa Kobayashi, Kawasaki, JP;
Shingo Yamazaki, Nishinomiya, JP;
Nippon Oil and Fats Co., Ltd., , JP;
PPG Industries, Inc., , PA (US);
Abstract
A polycarbonate resin of a copolymer of diethyleneglycol bis(allyl carbonate) with one of glycidyl acrylate and glycidyl methacrylate, its homopolymer and its copolymer, and further occasionally a copolymerizable compound can be easily modified with active amine at its surface, and the surface-modified copolymer of diethylene glycol bis(allyl carbonate) with glycidyl acrylate or methacrylate can be easily dyed with acid dye in a sharp color tone and can be used in an optical instrument demanded to have a high vividness of color.