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:
Dec. 26, 2000
Filed:
Nov. 14, 1997
Mitsuru Teramoto, Matsuyama, JP;
Manabu Kimura, Matsuyama, JP;
Shinya Watanabe, Sagamihara, JP;
Koji Furuya, Sagamihara, JP;
Kenji Suzuki, Sagamihara, JP;
Teijin Limited, Osaka, JP;
Abstract
A base film for photographic films formed from a copolyester comprising 97 to 100 mol % of 2,6-naphthalenedicarboxylic acid and 0 to 3 mol % of a dicarboxylic acid other than 2,6-naphthalenedicarboxylic acid and (i) 87 to 99.8 mol % of ethylene glycol, 0.2 to 10 mol % of bis[4-(.omega.-hydroxyalkoxy)phenyl]sulfone and 0 to 3 mol % of a glycol other than ethylene glycol and bis[4-(.omega.-hydroxyalkoxy)phenyl]sulfone or (ii) 97 to 100 mol % of ethylene glycol, 0 to 3 mol % of a diol other than ethylene glycol and 1 to 7 mol % of an oxycarboxylic acid. This base film has an endothermic peak having a peak top temperature, measured by a differential scanning calorimeter, of 120 to 160.degree. C. and showing an endothermic energy of 0.3 mJ/mg or more.