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, 2000
Filed:
Oct. 08, 1997
Applicant:
Inventors:
Assignee:
Toray Industries, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 428212 ; 4284735 ; 4284744 ;
Abstract
The present invention relates to a film made of an aromatic polyamide having excellent running property, durability and output characteristics when combined with a magnetic medium, and having excellent heat resistance, the number of large protrusions per 100 cm.sup.2 H2 on one surface of the film and the number of large protrusions per 100 cm.sup.2 H3 on the opposite surface of the film satisfy the relationships of: