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:
Oct. 03, 1989
Filed:
Mar. 28, 1988
Applicant:
Inventors:
Takateru Dekura, Kamakura, JP;
Juro Endo, Kumagaya, JP;
Assignees:
Hitachi Metals, Ltd., Tokyo, JP;
Maruwa Bussan K.K., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428695 ; 427131 ; 428694 ; 428900 ;
Abstract
A synthetic lubricant for lubricating a thin film containing a phosphonitrile ester obtained by cyclic polymerization or ring opening polymerization and represented by the following general formula (I): ##STR1## wherein n represents 3 to 10, and Rf and Rf' represent one or two groups selected from the following groups: ##STR2## wherein l represents 3 to 250, m 1 to 250, and Y one selected from the group consisting of F--, CF.sub.3 --, C.sub.2 F.sub.5 --, CF.sub.3 O--, C.sub.2 F.sub.5 O-- and C.sub.3 F.sub.7 O--; and a magnetic recording medium coated with this lubricant.