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:
Mar. 25, 2008
Filed:
Sep. 23, 2004
Hideki Matsumoto, Nagoya, JP;
Akiko Tanaka, Nagoay, JP;
Daisuke Yamamoto, Nagoya, JP;
Daisuke Sato, Yonezawa, JP;
Toru Yamanaka, Nagoya, JP;
Hideki Matsumoto, Nagoya, JP;
Akiko Tanaka, Nagoay, JP;
Daisuke Yamamoto, Nagoya, JP;
Daisuke Sato, Yonezawa, JP;
Toru Yamanaka, Nagoya, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A thermoplastic polymer containing glutaric anhydride units of the following general formula (1) and having an absorbance at a wavelength of 280 nm of at most 0.5 (the absorbance is a value of the polymer film having a thickness of 100 μm, measured with a UV-visible spectrophotometer) and a glass transition temperature of not lower than 130° C. has high-level colorless transparency and good heat resistance, moldability and dwell stability. wherein Rand Rare the same or different and each represents a hydrogen atom or an alkyl group having from 1 to 5 carbon atoms.