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:
Mar. 24, 1992
Filed:
Nov. 21, 1989
Applicant:
Inventors:
Takafumi Yanagita, Hino, JP;
Tsutomu Kempo, Hino, JP;
Narito Goto, Hino, JP;
Takuo Nishikawa, Hino, JP;
Noboru Koyama, Hino, JP;
Yasushi Nakano, Hino, JP;
Setsuko Kawahara, Hino, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428332 ; 4284246 ; 4284259 ; 428694 ; 428900 ;
Abstract
A medium recording medium is provided which has a plurality of coated layers on a nonmagnetic base support, a least one of said coated layer containing a modified copolymer having introduced therein an anionic functional group which forms an intramolecular salt.