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:
May. 05, 1981
Filed:
Sep. 18, 1978
Applicant:
Inventors:
Paul Stahlhofen, Wiesbaden, DE;
Fritz Erdmann, Mainz, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; G03C / ;
U.S. Cl.
CPC ...
430192 ; 430193 ; 260141 ;
Abstract
This invention relates to a photosensitive copying composition comprising a solvent and a naphthoquinone-(1,2)-diazidesulfonic acid ester as the photosensitive compound, said naphthoquinone diazide sulfonic acid ester having the general formula I ##STR1## wherein: X is a single bond or one of the groups ##STR2## R.sup.1, R.sup.1' and R.sup.1' are the same or different and are H or D, R.sup.2 and R.sup.2' are the same or different and are H or halogen,