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:
Oct. 05, 1993
Filed:
Feb. 13, 1992
Applicant:
Inventors:
Hartmann F Leube, Summit, NJ (US);
Leroy McKenzie, Newark, NJ (US);
Assignee:
Hoechst Celanses Corp., Somerville, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369110 ;
Abstract
A writing/erasing method for use in connection with homotropic organic optical media is disclosed and claimed. The method includes writing on a thin film with light of a first linear polarity to induce birefringence along the direction of an optical axis of the film's initial state followed by erasing the film with light of a second linear polarity. The first and second linear polarities are angularly offset with respect to one another, preferably by 90 degrees.