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. 17, 2000
Filed:
Aug. 04, 1998
Applicant:
Inventors:
Franz Weingart, Nagoya, JP;
Christa Hackl, Bad Essen, DE;
Rudiger Krech, Diepholz, DE;
Stephan Bauer, Hochdorf-Assenheim, DE;
Albert Kohl, Laumersheim, DE;
Ria Kress, Ludwigshafen, DE;
Josef Schelble, Zusmarshausen, DE;
Hans-Ganther Bohrmann, Ludwigshafen, DE;
Assignee:
EMTEC Magnetics GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
4284231 ; 4284259 ; 4286 / ; 4286 / ; 428900 ; 525440 ; 525444 ; 525453 ; 525454 ; 528 85 ;
Abstract
The thermoplastic, isocyanate-free polyurethane which contains acidic groups, is soluble in tetrahydrofuran, has a molecular weight of from 15,000 to 70,000 and is composed of