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:
Sep. 01, 1992
Filed:
Jun. 04, 1990
Applicant:
Inventors:
Jin Mizuguchi, Fribourg, CH;
Alain C Rochat, Fribourg, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
346-11 ; 3461 / ; 428195 ; 427 74 ; 427 75 ; 427108 ; 427109 ; 427110 ; 427162 ; 427164 ; 427165 ; 427168 ; 427256 ; 427273 ; 427287 ; 427335 ; 427336 ; 427421 ;
Abstract
Process for the storage of information in an organic recording layer which, as the result of local treatment of its surface with an organic solvent in accordance with the shape of the information to be marked can alter its absorption spectrum and/or its photoconductivity in such a way that information is produced and stored respectively at the treated areas of this layer. The information thus stored can be read off visually, by means of a micro-reader or by means of an incorporated electrode system.