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. 31, 2010
Filed:
Nov. 28, 2005
Minoru Ono, Gifu, JP;
Tadahiro Miyazaki, Aichi, JP;
Masahiro Higuchi, Gifu, JP;
Yoshiaki Maeno, Gifu, JP;
Takashi Arai, Chiba, JP;
Masahiro Sugi, Chiba, JP;
Minoru Ono, Gifu, JP;
Tadahiro Miyazaki, Aichi, JP;
Masahiro Higuchi, Gifu, JP;
Yoshiaki Maeno, Gifu, JP;
Takashi Arai, Chiba, JP;
Masahiro Sugi, Chiba, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
An optical discincludes a substrate. The substrate is formed by mixing polymethyl methacrylate and a polylactic acid-based resin composition. The polylactic acid-based resin composition contains polylactic acid-based resin in which the content of lactide is reduced to 1,000 ppm or less, and a mold release agent of 0.16 to 0.32 phr. The weight ratio of the polylactic acid-based resin to the polymethyl methacrylate is 70:30 to 50:50.