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:
Jan. 14, 1992
Filed:
Jan. 15, 1991
Applicant:
Inventors:
Werner R von Stein, Hamburg, DE;
Walter Kraft, Zurich, CH;
Assignee:
Gretag Systems, Inc., Bothell, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
355 38 ; 355 77 ;
Abstract
Process wherein the slope of linear segments of color density curves of color copy material are affected in a controlled manner by homogeneous supplemental exposures. The quantities of light required for the supplemental exposures are determined by the analysis of the spectral density values of the copy master and by comparison with the color density curves of the copy material.