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. 04, 1986
Filed:
Jun. 09, 1983
Applicant:
Inventor:
Dale M Hiller, Wilmington, DE (US);
Assignee:
E. I. Du Pont De Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
428694 ; 428702 ; 428900 ; 360134 ;
Abstract
Ferromagnetic recording elements with improved physical properties have from 20 to 50% of the volume of ferromagnetic particles replaced by nonmagnetic particles of a size smaller than the thickness of the magnetic layer.
Hiller, Dale. (1986). Nonmagnetic particles to improve properties of magnetic recording (U.S. Patent No. 4568619). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4568619
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile