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. 10, 1987
Filed:
Sep. 30, 1982
Applicant:
Inventor:
Robert C Desjarlais, South Hadley, MA (US);
Assignee:
James River Graphics, Inc., South Hadley, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568 48 ; 568 29 ; 568 33 ; 568 34 ; 568 37 ; 8524 ; 430 60 ;
Abstract
Substituted 2,2'-dihydroxydiphenyl sulfide, sulfoxide, and sulfone compounds, and their use as azo coupling components in light-sensitive diazo compositions. The novel compounds couple with rapidly developing diazonium compounds to provide lemon-yellow dyes, and can be used in combination with blue and violet couplers to provide a green-black diazo image in higher density areas with a neutral black in lower density areas.