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:
Sep. 14, 1976
Filed:
Jun. 18, 1974
Applicant:
Inventors:
Hiroshi Okuyama, Minami-ashigara, JA;
Hisao Takahashi, Minami-ashigara, JA;
Akira Hasegawa, Minami-ashigara, JA;
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264289 ; 264235 ; 264291 ; 264346 ;
Abstract
A process for the production of a polyethylene terephthalate film characterized by carrying out heat setting after biaxial elongation so that the heat set temperature and heat set time may satisfy the following relations: