US 4,290,950 AGranted

Sulfo-substituted-3,6-di(N-indolinyl)-9-sulfonamidophenyl-xanthenes

AssigneePolaroid Corporation

InventorsRichard L. Cournoyer, James W. Foley

Life of this patent

Estimating the term…

Abstract

In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein X is ##STR2## wherein R' is alkyl, Y is an electron-withdrawing group and n is 0 or 1. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.

Claims5

Dependent claims

A compound of the formula ##STR34## wherein X is ##STR35## wherein R' is methyl;

Y is an electron-withdrawing group having a positive sigma value greater than 0.60;
and n is 0 or 1.

Dependencies are inferred from the claim text.

Facts

Application: 06/154,618Filed 30 May 1980 · division
Priority: 26 Dec 1979
Granted: 22 Sep 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C09B 11/24
Amino derivatives of triarylmethanes: phthaleins containing amino groups ; Phthalanes; Fluoranes; Phthalides; Rhodamine dyes; Phthaleins having…
C09B 11/28
Diaryl- or thriarylmethane dyes: pyronines ; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes
G03C 1/83
Characterised by antireflection means or visible-light filtering means, e.g. antihalation: organic dyestuffs therefor
G03C 8/48
Integral units, i.e. the image-forming section not being separated from the image-receiving section: characterised by substances used for masking…

Family

Serial106,938Parent of this division · filed 26 Dec 1979
US 4,290,950 AThis patent

From the US filing history. Foreign family members aren’t listed.

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