Patent US4259437A successfully refreshed from Google Patents.
US4259437A
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Development inhibitor releasing compounds and their use in photographic materials
Assignee: HA WHITTEN & CO A PARTNERSHIP
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Filing: 1979-09-05
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Granted: 1981-03-31
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Expires: 1999-09-05
Abstract
Abstract Development inhibitor releasing compounds of the formula ##STR1## are provided wherein R 1 is hydrogen or a substituent which may contain a long chain ballasting group and n is 1 or 2, or R 1 may form an annelated ring, R 2 is hydrogen or alkyl having 1 to 4 carbon atoms, R 3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR 4 , --COR 4 , ##STR2## or --OR 4 where R 4 is alkyl or aryl or a group ##STR3## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring which optionally may be benzannelated. The new DIR-compounds form colorless compounds when reacted with the oxidation products of the color developing agent. They have an extremely high reactivity with the oxidation products of the color developing agent so that only small quantities of the DIR-compounds are required to produce excellent intra-image and inter-image effects of excellent speed.
Inventors
- 👤 Terence C. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:57
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; C; C07; C07C; C07C45/00; C07C45/61; C07C45/63; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07D; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/12; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A light-sensitive photographic material which comprises, coated on a support base, at least one silver halide emulsion layer, the said emulsion layer or a layer adjacent thereto comprising a compound of the general formula ##STR27## wherein R 1 is hydrogen, hydroxy, halogen, nitro, hydroxymethyl, alkyl, alkoxy of 1 to 18 carbon atoms, --NHCOR 4 , --NHSO 2 R 4 , --COOR 4 , --NH 2 , --COOH, --SH, --SR 4 where R 4 is as defined below and n is 1 or 2, R 2 is hydrogen or alkyl having 1 to 4 carbon atoms, R 3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR 4 , --COR 4 , ##STR28## or --OR 4 where R 4 is alkyl or aryl or a group ##STR29## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring or a 5- or 6-membered heterocyclic ring which is benzannelated.
Claim 2
Dependent Claim
156 words
A light-sensitive photographic material which comprises, coated on a support base, at least one silver halide emulsion layer, the said emulsion layer or a layer adjacent thereto comprising a compound of the general formula ##STR27## wherein R 1 is hydrogen, hydroxy, halogen, nitro, hydroxymethyl, alkyl, alkoxy of 1 to 18 carbon atoms, --NHCOR 4 , --NHSO 2 R 4 , --COOR 4 , --NH 2 , --COOH, --SH, --SR 4 where R 4 is as defined below and n is 1 or 2, R 2 is hydrogen or alkyl having 1 to 4 carbon atoms, R 3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR 4 , --COR 4 , ##STR28## or --OR 4 where R 4 is alkyl or aryl or a group ##STR29## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring or a 5- or 6-membered heterocyclic ring which is benzannelated.
Claim 3
Dependent Claim
17 words
Photographic material according to claim 1 wherein the compound is present in the silver halide emulsion layer.
Claim 4
Dependent Claim
203 words
A process for the production of a photographic image which comprises imagewise exposing a light-sensitive photographic silver halide material which comprises in at least one coloured-coupler-containing silver halide layer or a layer adjacent thereto a compound of the general formula ##STR30## wherein R 1 is hydrogen, hydroxy, nitro, hydroxymethyl, alkyl, alkoxy of 1 to 18 carbon atoms, --NHCOR 4 , --NHSO 2 R 4 , --COOR 4 , --NH 2 , --COOH, --SH, --SR 4 where R 4 is as defined below and n is 1 or 2, R 2 is hydrogen or alkyl having 1 to 4 carbon atoms, R 3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR 4 , --COR 4 , ##STR31## or --OR 4 where R 4 is alkyl or aryl or a group ##STR32## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring or a 5- or 6-membered heterocyclic ring which is benzannelated. and developing the exposed silver halide with a paraphenylenediamine colour developing agent thereby to liberate imagewsie the development inhibitor alkylthiotriazole compound of the formula ##STR33## wherein R 2 and R 3 have the meanings assigned to them in the general formula above.
Claim 5
Dependent Claim
203 words
A process for the production of a photographic image which comprises imagewise exposing a light-sensitive photographic silver halide material which comprises in at least one coloured-coupler-containing silver halide layer or a layer adjacent thereto a compound of the general formula ##STR30## wherein R 1 is hydrogen, hydroxy, nitro, hydroxymethyl, alkyl, alkoxy of 1 to 18 carbon atoms, --NHCOR 4 , --NHSO 2 R 4 , --COOR 4 , --NH 2 , --COOH, --SH, --SR 4 where R 4 is as defined below and n is 1 or 2, R 2 is hydrogen or alkyl having 1 to 4 carbon atoms, R 3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR 4 , --COR 4 , ##STR31## or --OR 4 where R 4 is alkyl or aryl or a group ##STR32## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring or a 5- or 6-membered heterocyclic ring which is benzannelated. and developing the exposed silver halide with a paraphenylenediamine colour developing agent thereby to liberate imagewsie the development inhibitor alkylthiotriazole compound of the formula ##STR33## wherein R 2 and R 3 have the meanings assigned to them in the general formula above.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |