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:
Aug. 06, 2013
Filed:
Jul. 15, 2009
Yasuhiko Suzuki, Nagoya, JP;
Kazuhiko Nakada, Nagoya, JP;
Tsuyoshi Watanabe, Nagoya, JP;
Takahiro Adachi, Kamisu, JP;
Mamoru Hagiwara, Annaka, JP;
Masahiko Minemura, Annaka, JP;
Yasuhiko Suzuki, Nagoya, JP;
Kazuhiko Nakada, Nagoya, JP;
Tsuyoshi Watanabe, Nagoya, JP;
Takahiro Adachi, Kamisu, JP;
Mamoru Hagiwara, Annaka, JP;
Masahiko Minemura, Annaka, JP;
Menicon Co., Ltd., Nagoya-shi, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility, as well as a contact lens gel material having excellent oxygen permeability and transparency can be provided. The present invention relates to a contact lens material comprising a polycarbonate resin derived from at least two compounds among compounds represented by a general formula (A), a general formula (B) and a general formula (C), a highly polar molecular weight control modifier (chain terminator) and a compound forming a carbonic acid ester, wherein the compound of the general formula (A) is essentially comprised, and to a production method thereof.