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. 29, 1992
Filed:
Jul. 02, 1990
Applicant:
Inventor:
Sobhy Tadros, Seekonk, MA (US);
Assignee:
OCG Microelectronic Materials, Inc., Cheshire, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03F / ; G03F / ; G03F / ; C07C / ;
U.S. Cl.
CPC ...
430192 ; 430165 ; 430193 ; 430326 ; 534556 ; 534557 ;
Abstract
A photoactive compound having formula (I): ##STR1## wherein R is selected from the group consisting of hydrogen or a lower alkyl group having 1-4 carbon atoms and each D is individually selected from the group consisting of a hydrogen or photoactive o-quinonediazide sulfonyl group; subject to the proviso that at least two of the four D's in formula (I) are photoactive o-naphthoquinonediazide sulfonyl moieties.