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. 04, 1994
Filed:
Mar. 27, 1992
Applicant:
Inventors:
Assignee:
KAO Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428323 ; 252 6251 ; 252 6255 ; 252 6256 ; 4286 / ; 428900 ;
Abstract
A magnetic recording medium having excellent durability and containing carbon black having a mean particle diameter of 25 to 130 nm, a BET specific surface area of 30 to 80 m.sup.2 /g and an oil absorption of 300 to 500 ml/100 g which is incorporated into a magnetic layer of a magnetic recording medium.
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Yoshida, Osamu. (1994). Magnetic recording medium containing carbon black having specific (U.S. Patent No. 5275879). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5275879
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