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. 27, 1987
Filed:
Dec. 07, 1984
Applicant:
Inventors:
Kazuhira Namikawa, Yokohama, JP;
Toshiaki Hamaguchi, Yokohama, JP;
Mutsuaki Nakamura, Yokohama, JP;
Akio Kuroda, Yokohama, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369288 ; 523174 ; 428 65 ; 346134 ;
Abstract
High density information records made of vinyl chloride resin compositions which comprise conductive powder and inorganic compounds in the form of powder having an antacidic action and a predetermined average size. By this, dropout defects in the information record can be suppressed to a significant extent. The inorganic compounds are selected from calcium hydroxide, basic aluminum magnesium carbonate hydrate and hydrotalcite.