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:
Apr. 25, 1989
Filed:
Apr. 07, 1987
Applicant:
Inventors:
Richard S Potember, Catonsville, MD (US);
Theodore O Poehler, Baltimore, MD (US);
Assignee:
The Johns Hopkins University, Baltimore, MD (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11B / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
365113 ; 365114 ; 365118 ; 430495 ;
Abstract
The charge transfer apparatus of the present invention comprises an optical storage medium of either a mixture of several charge transfer compounds of varying redox potential or a single amphoteric organic charge transfer compound capable of undergoing a multistage charge transfer reaction, and a source of optical energy, typically a laser. When the optical energy illuminates a spot on the optical storage medium, the spot switches to one of a plurality of optically detectable states.