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:
Feb. 12, 1985
Filed:
Jun. 17, 1983
Applicant:
Inventors:
Luigi Amariti, Bloomingdale, IL (US);
Llandro C Santos, Chicago, IL (US);
Assignee:
Richardson Graphics Company, Des Plaines, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03F / ;
U.S. Cl.
CPC ...
430169 ; 430175 ; 430176 ; 430179 ;
Abstract
Plates such as those used in lithographic printing and photoresists such as those used in preparing printed circuit boards and the like are provided with a photopolymerizable photosensitive diazo resin that is unusually stable. The diazo resin is laid down from a stabilized diazonium composition that is an emulsion including the selected diazo resin, a purine derivative, especially a theophylline derivative, preferably in combination with a salt of a low molecular weight alkyl sulfonic acid or other supplementary stabilizer component.