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. 10, 1977
Filed:
Jul. 08, 1976
Applicant:
Inventors:
Eugene David Feit, Berkeley Heights, NJ (US);
Larry Flack Thompson, Gillette, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360122 ;
Abstract
Several materials have been proposed as protective coatings for magnetic sensing heads in magnetic tape readers. Some of these, known for hardness, are not very wear resistant. Others that seem to wear well tend to spall. The invention is a polymer coating that wears exceptionally well, can be formed conveniently to encapsulate the magnetic sensing elements, can be photocured and therefore photopatterned, and is inexpensive. The polymer is composed of a mixture of urethane-modified acrylates and methacrylates.