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. 18, 1983
Filed:
May. 28, 1981
Shigeo Kimura, Tagajo, JP;
Masashi Somezawa, Sendai, JP;
Kunio Kobayashi, Izumi, JP;
Minoru Takamizawa, Annaka, JP;
Yoshio Inoue, Annaka, JP;
Hiroshi Yoshioka, Annaka, JP;
Sony Corporation, Tokyo, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
A magnetic recording medium having a layer containing as a lubricant one or more organo-polysiloxane compounds having the following formula (I): ##STR1## (wherein each of A.sub.1 and A.sub.2 is independently --CH.sub.3, --CH.sub.2 --CH.sub.2 --(CF.sub.2).sub.q --CF.sub.3 or --R.sub.1 OCOR.sub.2 ; R.sub.1 is a divalent hydrocarbon residue having 1 to 5 carbon atoms; R.sub.2 is a monovalent hydrocarbon residue having from 7 to 21 carbon atoms; each of l, m and n is independently O or an integer ranging from 1 to 200; and each of p and q is independently O or an integer ranging from 1 to 12; provided that when at least one of the groups A.sub.1 and A.sub.2 is the group --R.sub.1 OCOR.sub.2, each l, m and n may be O and that, when each group A.sub.1 and A.sub.2 is one of the groups other than the group --R.sub.1 OCOR.sub.2, each l and m may be O and n is an integer ranging from 1 to 200).