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:
Jun. 17, 1986
Filed:
Sep. 07, 1984
Applicant:
Inventors:
Katsuaki Kuze, Otsu, JP;
Yujiro Matsuyama, Otsu, JP;
Kozo Maeda, Takatsuki, JP;
Takeshi Ota, Tsuruga, JP;
Masahiro Kobayashi, Kyoto, JP;
Tsuyoshi Hongo, Otsu, JP;
Osamu Makimura, Ogaki, JP;
Assignees:
Toyo Boseki Kabushiki Kaisha T/A Toyobo Co., Ltd., Osaka, JP;
Nippon Magphane Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; C08K / ;
U.S. Cl.
CPC ...
523181 ; 523220 ; 524425 ; 524447 ; 524605 ; 528272 ; 528275 ; 5283081 ; 5283083 ; 428338 ; 428480 ;
Abstract
An oriented polyester film comprising ethylene terephthalate as the major repeating unit, which comprises particles of kaolinite and calcium carbonate uniformly dispersed therein, said kaolinite and said calcium carbonate having each an average particle size of 0.05 to 0.8 micron and being contained in such amounts as satisfying the following equations: