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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.:

US 5456980 B1

PDFFull Text
Date of Patent:
Oct. 10, 1995

Filed:

Mar. 01, 1994

Ammonium carboxylate lubricant and magnetic recording medium using the

Applicant:
Inventors:

Yuko Murakami, Ibaraki, JP;

Takayuki Nakakawaji, Hitachi, JP;

Mitsuyoshi Shoji, Ibaraki, JP;

Juichi Arai, Ibaraki, JP;

Yutaka Ito, Takahagi, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:

Antonelli, Terry, Stout & Kraus

Primary Examiner:

Stevan A Resan

Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428336 ; 428408 ; 428421 ; 4286 / ; 4286 / ; 4286 / ; 428900 ; 252 54 ; 252 58 ; 252 6254 ;
Abstract

A lubricant comprising a multifunctional ammonium carboxylate represented by the general formula (1) and a magnetic recording medium comprising a non-magnetic support having a magnetic layer thereon, on the top of which a protective film is formed, wherein the lubricant is coated on the medium to form a lubricant film. ##STR1## where n is an integer of 2 to 4, Rf represents a non-branched, linear perfluoropolyether chain having an average molecular weight of 3000 to 10000, R.sup.1 and R.sup.2 represent hydrogen or an alkyl group, and R represents an organic group of two to four valences having one or more aromatic rings.

Find Patent Forward Citations

Murakami, Yuko. (1995). Ammonium carboxylate lubricant and magnetic recording medium using the (U.S. Patent No. 5456980). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5456980

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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