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. 09, 1987
Filed:
May. 07, 1985
Applicant:
Inventors:
Mikihiko Kato, Kanagawa, JP;
Shigeo Komine, Kanagawa, JP;
Katsumi Koyota, Tokyo, JP;
Kouji Nakata, Tokyo, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428 65 ; 427 44 ; 427128 ; 427131 ; 428 64 ; 428323 ; 428324 ; 428325 ; 428327 ; 428329 ; 428340 ; 428694 ; 428900 ; 4284259 ;
Abstract
A flexible magnetic disc sheet is described, which has a central circular hole therein and has a protective layer only on a surface portion surrounding the edge of the central circular hole, the protective layer comprising (a) a radiation polymerized polymer of a compound which is polymerizable and hardenable by radiation and (b) a matting agent.