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:
Jun. 25, 1991
Filed:
Feb. 08, 1989
Girma Biresaw, Lower Burrell, PA (US);
Daniel J Boland, New Kensington, PA (US);
Vince A Paola, Penn Township, Westmoreland County, PA (US);
W Thomas Evans, Indiana, PA (US);
William P Kampert, Lower Burrell, PA (US);
Ronald L Abels, Anna, OH (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
A recording medium comprising a substrate, a memory layer supported by the substrate, and a liquid crystal lubricant overlying the recording medium. The recording medium preferably has a wear layer over the memory layer. The liquid crystal lubricant comprises a cholesteric liquid crystal and cholestryl oleyl carbonate is particularly preferred. The lubricant may be applied to the recording medium by dipping in a dilute solution containing a volatile solvent and then evaporating the solvent, leaving a thin lubricant film over the wear layer.