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.

Date of Patent:
Sep. 26, 1989

Filed:

Aug. 29, 1988
Applicant:
Inventors:

Wahib Farahat, Harrington Park, NJ (US);

Dennis J Bellville, Phillipsburg, NJ (US);

Richard L Shadrach, Belle Mead, NJ (US);

Assignee:

Other;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
430143 ; 430142 ; 430145 ; 430192 ; 430293 ; 430257 ; 430195 ; 430262 ; 430165 ; 430166 ; 430933 ;
Abstract

This invention relates to positive working photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process. The element is composed of a substrate, colored photosensitive layer and adhesive layer. The adhesive layer contains an optical brightener compound which reduces residual yellow staining derived from the naphthoquinone diazide sensitizer.


Find Patent Forward Citations

Farahat, Wahib. (1989). Optical brightener containing positive working color proofing system (U.S. Patent No. 4869993). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4869993

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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