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:
Apr. 30, 1985
Filed:
Jul. 18, 1983
Applicant:
Inventors:
Takashi Suzuki, Takatsuki, JP;
Koichi Shinohara, Kobe, JP;
Masaru Odagiri, Kawanishi, JP;
Takashi Fujita, Kawanishi, JP;
Shigeki Kawase, Takarazuka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; G11B / ;
U.S. Cl.
CPC ...
428141 ; 428147 ; 428152 ; 428216 ; 428218 ; 428409 ; 428458 ; 428694 ; 428695 ; 428900 ;
Abstract
A magnetic recording media comprises a polyester substrate having 1000/mm.sup.2 or more protrusions of polyester oligomer, and a ferromagnetic thin film of 400 .ANG. or larger thickness both formed on the surface of the polyester substrate; the recording media has substantially no squealing even at 30.degree. C. at over 80% relative humidity.