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:
May. 30, 1978
Filed:
Dec. 22, 1976
Applicant:
Inventors:
Keith S Goodson, San Jose, CA (US);
Duncan W Frew, Santa Clara, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ; G11B / ; C04B / ;
U.S. Cl.
CPC ...
252 6254 ;
Abstract
A coating composition for use in the preparation of magnetic recording media is described. The composition contains finely divided magnetic particles dispersed in an organic solvent, containing in solution a hydroxyl group containing polymer having an OH number between about 100-500, a polyether urethane elastomer, an aliphatic polyisocyanate and a copper containing chelate catalyst, the organic portion of said chelate being of the general chemical structure ##STR1## wherein R and R' can be the same or different and represent alkyl groups containing 1-18 carbon atoms and aromatic groups, both substituted and unsubstituted.