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:
Feb. 19, 1991
Filed:
Feb. 07, 1990
Applicant:
Inventors:
Joseph S Yudelson, Rochester, NY (US);
Joseph A Verdone, Rochester, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
427127 ; 427128 ; 427130 ; 427131 ; 4272551 ; 4272554 ; 427340 ; 427400 ;
Abstract
A method of increasing the hardness of a polyurethane medium containing a polyisocyanate, such as a magnetic tape or disk, by contacting the medium with an aldehyde and an acid.