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:
Mar. 04, 1997
Filed:
Apr. 15, 1994
Kam W Law, Woodbury, MN (US);
James A Greczyna, Vadnais Heights, MN (US);
Leslie M Wolff, St. Paul, MN (US);
Milind B Sabade, Maplewood, MN (US);
Kevin R Katzenmaier, Woodbury, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A magnetic recording medium comprising a support having two major surfaces, a magnetic layer provided on one major surface of the support, and a backside coating provided on the other major surface of the support wherein the backside coating comprises nonmagnetic, multicomponent particles dispersed in a polymeric binder. The nonmagnetic, multicomponent particles are comprised of a first component having a Mohs hardness equal to or less than 7 and a second component having a Mohs hardness greater than 7.