Carbazole phthaleins

Details Carbazole phthaleins Carbazole phthaleins

1974-05-22

1976-01-13

Winters, Sherman D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D20986

Patent

active

039324559

ABSTRACT:
This invention relates to a new class of indicator dyes useful as optical filter agents in photographic processes to protect a selectively exposed photosensitive material from further exposure during processing in the presence of incident light. Such dyes comprise 3,6-disubstituted carbazoles wherein the 3,6 substituents are selected from a phthalidyl radical, C.sub.6 H.sub.4.CO.O.CR--, wherein R is an aryl group and an o-carboxybenzoyl radical, not more than one of said substituents being o-carboxybenzoyl.

REFERENCES:
patent: 3491111 (1970-01-01), Lin
patent: 3647437 (1972-03-01), Land
patent: 3702244 (1972-11-01), Bloom et al.

Affiliated with

Also associated with

Rating

Carbazole phthaleins does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Carbazole phthaleins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carbazole phthaleins will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-746863