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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 4550049 B1

PDFFull Text
Date of Patent:
Oct. 29, 1985

Filed:

Mar. 09, 1983

Laminated film and magnetic recording medium made therewith

Applicant:
Inventors:

Masaaki Ono, Omihachiman, JP;

Yasuki Miura, Otsu, JP;

Masahiko Motegi, Hikone, JP;

Kazuo Okabe, Shiga, JP;

Assignee:

Toray Industries, Inc., Tokyo, JP;

Attorney:

Miller; Austin R.

Primary Examiner:

Ellis P Robinson

Assistant Examiner:

William M Atkinson

Int. Cl.
CPC ...
G11B / ; B32B / ;
U.S. Cl.
CPC ...
428141 ; 428145 ; 428147 ; 428149 ; 428152 ; 428201 ; 428206 ; 428447 ; 428480 ; 428483 ; 428484 ; 428694 ; 428695 ; 428900 ;
Abstract

A laminated film comprising (A) a layer composed of a thermoplastic resin and (B) a layer composed of a thermoplastic resin containing fine particles therein, wherein a discontinuous skin having a height of 50 to 1,000 .ANG. is formed on the outer surface of the layer (A) and the outer surface of the layer (B) has a surface Ra value of 0.005 to 0.040.mu.. The laminated film is very valuable as a base film of a magnetic recording tape having a ferromagnetic metal thin film formed on the surface of the layer (A), especially a video tape, because it has good running properties and is excellent in electromagnetic transformation performance.

Find Patent Forward Citations

Ono, Masaaki. (1985). Laminated film and magnetic recording medium made therewith (U.S. Patent No. 4550049). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4550049

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

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