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:
Apr. 22, 2003
Filed:
Mar. 31, 1999
Applicant:
Inventors:
Assignee:
Mitsubishi Polyester Film GmbH, Wiesbaden, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 5/22 ; B32B 2/706 ; B32B 2/736 ; B32B 3/116 ; B32B 3/130 ;
U.S. Cl.
CPC ...
B32B 5/22 ; B32B 2/706 ; B32B 2/736 ; B32B 3/116 ; B32B 3/130 ;
Abstract
The invention relates to a biaxially oriented polyester film which has three layers and which, together with very good electromagnetic properties compared with prior art films, has improved abrasion properties. The two sides of the film are built up from at least one base layer B and, applied to this base layer, outer layers A and C, where these outer layers have a defined number of elevations of defined height. The invention also relates to a process for producing the film and to its use as magnetic tape film.