US4933273A
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US
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Photographic element and emulsion having enhanced sensitometric properties and process of development
Assignee: Eastman Kodak Co
•
Filing: 1988-12-02
•
Granted: 1990-06-12
•
Expires: 2008-12-02
Abstract
Abstract A photographic element and emulsion are described which comprise a negative working silver halide emulsion layer, a hydrazine compound nucleating agent and an electron accepting antifogging dye. Enhanced sensitometric properties are obtained. A process for developing such element or emulsion is also described.
Inventors
- 👤 Paul B. Gilman, Jr.
- 👤 Thaddeus D. Koszelak
- 👤 Anthony Adin
- 👤 Roland G. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:17
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18; G03C1/22
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
45 words
A photographic element comprising a support having thereon a chemically sensitized, negative working silver halide emulsion layer and a hydrazine compound nucleating agent, wherein said element also comprises an electron accepting antifogging dye which has a reversible reduction potential more positive than about -0.80 volt.
Claim 2
Dependent Claim
45 words
A photographic element comprising a support having thereon a chemically sensitized, negative working silver halide emulsion layer and a hydrazine compound nucleating agent, wherein said element also comprises an electron accepting antifogging dye which has a reversible reduction potential more positive than about -0.80 volt.
Claim 3
Dependent Claim
25 words
An element according to claim 1 wherein the electron accepting antifogging dye has a reversible reduction potential of from about -0.10 to about -0.80 volt.
Claim 4
Dependent Claim
29 words
An element according to claim 1 wherein the electron accepting antifogging dye is present at a concentration of from about 10 -8 to about 10 -3 mol/mol of silver.
Claim 5
Dependent Claim
29 words
An element according to claim 3 wherein the electron accepting antifogging dye is present at a concentration of from about 10 -7 to about 10 -4 mol/mol of silver.
Claim 6
Dependent Claim
16 words
An element according to claim 1 wherein the electron accepting antifogging dye is 1,1'-dimethyl-2,2'-(4-methoxyphenyl)-3,3'-indolocarbocyanine bromide: ##STR8##
Claim 7
Dependent Claim
16 words
An element according to claim 1 wherein the electron accepting antifogging dye is 1,1'-dimethyl-2,2'-diphenyl-3,3'-indolocarbocyanine bromide: ##STR9##
Claim 8
Dependent Claim
16 words
An element according to claim 1 wherein the electron accepting antifogging dye is 6,6'-7,7'-tetrachloro-1,1',3,3'-tetraphenyl-1H-imidazo[4,5-b]quinoxalinocarocyanine p-toluenesulfonate: ##STR10##
Claim 9
Dependent Claim
16 words
An element according to claim 1 wherein the electron accepting antifogging dye is 5-chloro-3-methyl-2-[2-(1-methyl-2-phenyl-1H-indol-3-yl)ethenyl]-6-nitrobenzothiazolium p-toluenesulfonate: ##STR11##
Claim 10
Dependent Claim
16 words
An element according to claim 1 wherein the electron accepting antifogging dye is 1,1'-dimethyl-2,2',8-triphenyl-3,3'-indolocarbocyanine perchlorate: ##STR12##
Claim 11
Dependent Claim
18 words
An element according to claim 1 wherein the electron accepting antifogging dye is 3-ethyl-2-[2-[1-methyl-2-(2-pyridyl)-1H-indol-3-yl]ethenyl-6-nitrobenzothiazolium p-toluenensulfonate p-toluenesulfonic acid: ##STR13##
Claim 12
Dependent Claim
16 words
An element according to claim 1 wherein the electron accepting antifogging dye is 1,1'-dibutyl-4,4'-bipyridinium dibromide: ##STR14##
Claim 13
Dependent Claim
35 words
An element according to claim 1 wherein the nucleating agent has the structural formula: ##STR15## wherein: R 1 is a phenyl nucleus having a Hammet sigma value derived electron withdrawing characteristic of less than +0.30.
Claim 14
Dependent Claim
48 words
An element according to claim 1 wherein the nucleating agent has the structural formula: ##STR16## wherein: R 2 and R 3 represent hydrogen, an aliphatic group, an aromatic group or a heterocyclic group; R 4 represents hydrogen or an aliphatic group and X is a divalent aromatic group.
Claim 15
Dependent Claim
25 words
An element according to claim 1 wherein the nucleating agent has the structural formula: ##STR17## wherein R 5 is an aliphatic or an aromatic group.
Claim 16
Dependent Claim
29 words
An element according to claim 1 wherein the hydrazine compound is present in an amount of from about 10 -4 to about 10 -1 mol per mol of silver.
Claim 17
Dependent Claim
29 words
An element according to claim 15 wherein the hydrazine compound is present in an amount of from about 5×10 -4 to about 5×10 -2 mol per mol of silver.
Claim 18
Dependent Claim
15 words
An element according to claim 1 wherein the silver halide is sulfur and gold sensitized.
Claim 19
Dependent Claim
30 words
A chemically sensitized, negative working photographic emulsion comprising a hydrazine compound nucleating agent and an electron accepting antifogging dye having a reversible reduction potential more positive than about -0.80 volt.
Claim 20
Dependent Claim
30 words
A chemically sensitized, negative working photographic emulsion comprising a hydrazine compound nucleating agent and an electron accepting antifogging dye having a reversible reduction potential more positive than about -0.80 volt.
Claim 21
Dependent Claim
25 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye has a reversible reduction potential of from about -0.10 to about -0.80 volt.
Claim 22
Dependent Claim
29 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is present at a concentration of from about 10 -8 to about 10 -3 mol/mol of silver.
Claim 23
Dependent Claim
29 words
An emulsion according to claim 20 wherein the electron accepting antifogging dye is present at a concentration of from about 10 -7 to about 10 -4 mol/mol of silver.
Claim 24
Dependent Claim
16 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is 1,1'-dimethyl-2,2'-(4-methoxyphenyl)-3,3'-indolocarbocyanine bromide ##STR18##
Claim 25
Dependent Claim
16 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is 1,1'-dimethyl-2,2'-diphenyl-3,3'-indolocarbocyanine bromide ##STR19##
Claim 26
Dependent Claim
13 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is
Claim 27
Dependent Claim
3 words
6'-7,7'-tetrachloro-1,1',3,3'-tetraphenyl-1H-imidazo[4,5-b]quinoxalinocarocyanine p-toluenesulfonate ##STR20##
Claim 28
Dependent Claim
3 words
6'-7,7'-tetrachloro-1,1',3,3'-tetraphenyl-1H-imidazo[4,5-b]quinoxalinocarocyanine p-toluenesulfonate ##STR20##
Claim 29
Dependent Claim
16 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is 5-chloro-3-methyl-2-[2-(1-methyl-2-phenyl-1H-indol-3-yl)ethenyl]-6-nitrobenzothiazolium p-toluenesulfonate ##STR21##
Claim 30
Dependent Claim
16 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is 1,1'-dimethyl-2,2',8-triphenyl-3,3'-indolocarbocyanine perchlorate: ##STR22##
Claim 31
Dependent Claim
18 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is 3-ethyl-2-[2-[1-methyl-2-(2-pyridyl)-1H-indol-3-yl]ethenyl-6-nitrobenzothiazolium p-toluenesulfonate p-toluenesulfonic acid: ##STR23##
Claim 32
Dependent Claim
16 words
An emulsion according to claim 18 wherein the electron accepting antifogging dye is 1,1'-dibutyl-4,4'-bipyridinium dibromide: ##STR24##
Claim 33
Dependent Claim
35 words
An emulsion according to claim 18 wherein the nucleating agent has the structural formula: ##STR25## wherein: R 1 is a phenyl nucleus having a Hammet sigma value derived electron withdrawing characteristic of less than +0.30.
Claim 34
Dependent Claim
49 words
An emulsion according to claim 18 wherein the nucleating agent has the structural formula: ##STR26## wherein: R 2 and R 3 can represent hydrogen, an aliphatic group, an aromatic group or a heterocyclic group; R 4 represents hydrogen or an aliphatic group and X is a divalent aromatic group.
Claim 35
Dependent Claim
25 words
An emulsion according to claim 18 wherein the nucleating agent has the structural formula: ##STR27## wherein R 5 is an aliphatic or an aromatic group.
Claim 36
Dependent Claim
29 words
An emulsion according to claim 18 wherein the hydrazine compound is present in an amount of from about 10 -4 to about 10 -1 mol per mol of silver.
Claim 37
Dependent Claim
29 words
An emulsion according to claim 18 wherein the hydrazine compound is present in an amount of from about 5×10 -4 to about 5×10 -2 mol per mol of silver.
Claim 38
Dependent Claim
15 words
An emulsion according to claim 18 wherein the silver halide is sulfur and gold sensitized.
Claim 39
Dependent Claim
64 words
A process for forming an image which comprises image-wise exposing to light a photographic light-sensitive material comprising a support having thereon a chemically sensitized, negative working silver halide emulsion and an electron accepting antifogging dye which has a reversible reduction potential more positive than about -0.80 volt and developing said exposed photographic light-sensitive material with a developing solution containing a hydrazine compound nucleating agent.
Claim 40
Dependent Claim
64 words
A process for forming an image which comprises image-wise exposing to light a photographic light-sensitive material comprising a support having thereon a chemically sensitized, negative working silver halide emulsion and an electron accepting antifogging dye which has a reversible reduction potential more positive than about -0.80 volt and developing said exposed photographic light-sensitive material with a developing solution containing a hydrazine compound nucleating agent.
Claim 41
Dependent Claim
30 words
The process of claim 35 wherein the hydrazine compound is present in an amount of from about 10 -5 to about 10 -2 mol thereof per liter of developer solution.
Claim 42
Dependent Claim
34 words
The process of claim 35 wherein the nucleating agent has the structural formula: ##STR28## wherein: R 1 is a phenyl nucleus having a Hammet sigma value derived electron withdrawing characteristic of less than +0.30.
Claim 43
Dependent Claim
48 words
The process of claim 35 wherein the nucleating agent has the structural formula: ##STR29## wherein: R 2 and R 3 can represent hydrogen, an aliphatic group, an aromatic group or a heterocyclic group; R 4 represents hydrogen or an aliphatic group and X is a divalent aromatic group.
Claim 44
Dependent Claim
24 words
The process of claim 35 wherein the nucleating agent has the structural formula: ##STR30## wherein R 5 is an aliphatic or an aromatic group.
References Cited (Backward Citations)
US2892715A
Cited
US3772030A
Cited
US4025347A
Cited
US4011081A
Cited
US3935010A
Cited
US4650746A
Cited
US4323643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |