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:
Jan. 26, 1988
Filed:
Nov. 21, 1984
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428 65 ; 427 44 ; 427 541 ; 427128 ; 427131 ; 428 64 ; 428137 ; 428195 ; 428336 ; 4284259 ; 428522 ; 428694 ; 428695 ; 428900 ; 428323 ; 428327 ; 428331 ;
Abstract
A flexible magnetic disk sheet including a central circular hole is described, having a protective layer on a surface portion surrounding the edge of the central circular hole, comprising the protective layer prepared by coating (a) a compound having an acrylate bond or a methacrylate bond at the end of at least one of a main chain and a side chain of molecules thereof, and (b) a solid lubricating agent, and exposing to radiation thereon for polymerizing and hardening it.