US4012260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activator-stabilizers in heat developable photographic materials and processes
Assignee: Eastman Kodak Co
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Filing: 1975-02-19
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Granted: 1977-03-15
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Expires: 1995-02-19
Abstract
Abstract 2-Amino-2-thiazolinium carboxylates and 4,5-dihydro-6H-1,3-thiazin-3-ium carboxylates are activator-stabilizers in heat-developable and heat-stabilizable photographic materials containing photographic silver salts and photographic silver salt developing agents. An image in such a photographic material is developed and the resulting developed image is stabilized by heating the photographic material.
Inventors
- 👤 Dorsey G. Dickerson
- 👤 Paul B. Merkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:06
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/43
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
97 words
A heat-developable and heat-stabilizable photographic element comprising a support having thereon in reactive association a photographic silver salt, a photographic silver salt developing agent and a stabilizing concentration of an activator-stabilizer represented by the formula: ##STR5##wherein Z is alkylene having 2 to 3 carbon atoms in the alkylene chain, R is hydrogen, alkyl containing 1 to 3 carbon atoms, cycloalkyl containing 5 to 6 carbon atoms, or aralkyl containing 7 to 10 carbon atoms, R 1 coo - is an acid anion which is decarboxylatable at temperatures above about 80° C., and tautomers corresponding to said activator-stabilizer.
Claim 2
Dependent Claim
97 words
A heat-developable and heat-stabilizable photographic element comprising a support having thereon in reactive association a photographic silver salt, a photographic silver salt developing agent and a stabilizing concentration of an activator-stabilizer represented by the formula: ##STR5##wherein Z is alkylene having 2 to 3 carbon atoms in the alkylene chain, R is hydrogen, alkyl containing 1 to 3 carbon atoms, cycloalkyl containing 5 to 6 carbon atoms, or aralkyl containing 7 to 10 carbon atoms, R 1 coo - is an acid anion which is decarboxylatable at temperatures above about 80° C., and tautomers corresponding to said activator-stabilizer.
Claim 3
Dependent Claim
31 words
A heat-developable and heat-stabilizable photographic element as in claim 1 wherein said activator-stabilizer is a compound selected from the group consisting of 2-amino-2-thiazolinium trichloroacetate, bis(2-amino-2-thiazolinium)oxalacetate, and combinations of these thiazolinium compounds.
Claim 4
Dependent Claim
48 words
A heat-developable and heat-stabilizable photographic element comprising a support having thereon in reactive association a photographic silver salt, a photographic silver salt developing agent and a stabilizing concentration of an activator-stabilizer which is a carboxylate selected from the group consisting of 2-amino-2-thiazolinium carboxylates, 4,5-dihydro-6H-1,3-thiazin-3-ium carboxylates and combinations thereof.
Claim 5
Dependent Claim
48 words
A heat-developable and heat-stabilizable photographic element comprising a support having thereon in reactive association a photographic silver salt, a photographic silver salt developing agent and a stabilizing concentration of an activator-stabilizer which is a carboxylate selected from the group consisting of 2-amino-2-thiazolinium carboxylates, 4,5-dihydro-6H-1,3-thiazin-3-ium carboxylates and combinations thereof.
Claim 6
Dependent Claim
35 words
A heat-developable and heat-stabilizable photographic element comprising a support having thereon a layer comprising photographic silver halide, a polymeric binder, a silver halide developing agent, and a stabilizing concentration of an activator-stabilizer comprising 2-amino-2-thiazolinium trichloroacetate.
Claim 7
Dependent Claim
35 words
A heat-developable and heat-stabilizable photographic element comprising a support having thereon a layer comprising photographic silver halide, a polymeric binder, a silver halide developing agent, and a stabilizing concentration of an activator-stabilizer comprising 2-amino-2-thiazolinium trichloroacetate.
Claim 8
Dependent Claim
29 words
A heat-developable and heat-stabilizable photographic composition comprising a photographic silver salt, a photographic silver salt developing agent, and a stabilizing concentration of an activator-stabilizer which is a 2-amino-2-thiazolinium carboxylate.
Claim 9
Dependent Claim
29 words
A heat-developable and heat-stabilizable photographic composition comprising a photographic silver salt, a photographic silver salt developing agent, and a stabilizing concentration of an activator-stabilizer which is a 2-amino-2-thiazolinium carboxylate.
Claim 10
Dependent Claim
89 words
A heat-developable and heat-stabilizable photographic composition comprising a photographic silver salt, a photographic silver salt developing agent and a stabilizing concentration of an activator-stabilizer represented by the formula: ##STR6##wherein Z is alkylene having 2 to 3 carbon atoms in the alkylene chain, R is hydrogen, alkyl containing 1 to 3 carbon atoms, cycloalkyl containing 5 to 6 carbon atoms, or aralkyl containing 7 to 10 carbon atoms, R 1 coo - is an acid anion which is decarboxylatable at temperatures above 80° C. and tautomers corresponding to said activator-stabilizer.
Claim 11
Dependent Claim
89 words
A heat-developable and heat-stabilizable photographic composition comprising a photographic silver salt, a photographic silver salt developing agent and a stabilizing concentration of an activator-stabilizer represented by the formula: ##STR6##wherein Z is alkylene having 2 to 3 carbon atoms in the alkylene chain, R is hydrogen, alkyl containing 1 to 3 carbon atoms, cycloalkyl containing 5 to 6 carbon atoms, or aralkyl containing 7 to 10 carbon atoms, R 1 coo - is an acid anion which is decarboxylatable at temperatures above 80° C. and tautomers corresponding to said activator-stabilizer.
Claim 12
Dependent Claim
31 words
A heat-developable and heat-stabilizable photographic composition as in claim 6 wherein said activator-stabilizer is a compound selected from the group consisting of 2-amino-2-thiazolinium trichloroacetate, bis(2-amino-2-thiazolinium)oxalacetate, and combinations of these thiazolinium compounds.
Claim 13
Dependent Claim
28 words
A heat-developable and heat-stabilizable photographic composition comprising photographic silver halide, a polymeric binder, a silver halide developing agent, and a stabilizing concentration of an activator-stabilizer comprising 2-amino-2-thiazolinium trichloroacetate.
Claim 14
Dependent Claim
28 words
A heat-developable and heat-stabilizable photographic composition comprising photographic silver halide, a polymeric binder, a silver halide developing agent, and a stabilizing concentration of an activator-stabilizer comprising 2-amino-2-thiazolinium trichloroacetate.
Claim 15
Dependent Claim
25 words
A heat-activatable photographic silver salt processing composition comprising a silver salt developing agent and a stabilizing concentration of an activator-stabilizer which is a 2-amino-2-thiazolinium carboxylate.
Claim 16
Dependent Claim
25 words
A heat-activatable photographic silver salt processing composition comprising a silver salt developing agent and a stabilizing concentration of an activator-stabilizer which is a 2-amino-2-thiazolinium carboxylate.
Claim 17
Dependent Claim
43 words
A heat-activatable photographic silver halide processing composition comprising a phenolic silver halide developing agent, a 1-phenyl-3-pyrazolidone silver halide developing agent and a stabilizing concentration of an activator-stabilizer which is a compound selected from the group consisting of 2-amino-2-thiazolinium trichloroacetate, bis(2-amino-2-thiazolinium)oxalacetate and combinations thereof.
Claim 18
Dependent Claim
43 words
A heat-activatable photographic silver halide processing composition comprising a phenolic silver halide developing agent, a 1-phenyl-3-pyrazolidone silver halide developing agent and a stabilizing concentration of an activator-stabilizer which is a compound selected from the group consisting of 2-amino-2-thiazolinium trichloroacetate, bis(2-amino-2-thiazolinium)oxalacetate and combinations thereof.
Claim 19
Dependent Claim
39 words
A heat-activatable photographic silver halide processing composition comprising an ethyl cellulose binder, a stabilizing concentration of an activator-stabilizer which is 2-amino-2-thiazolinium trichloroacetate, and a combination of silver halide developing agents comprising 4-methyl-4-hydroxymethyl-1-phenyl-3-pyrazolidone and a hydroquinone silver halide developing agent.
Claim 20
Dependent Claim
39 words
A heat-activatable photographic silver halide processing composition comprising an ethyl cellulose binder, a stabilizing concentration of an activator-stabilizer which is 2-amino-2-thiazolinium trichloroacetate, and a combination of silver halide developing agents comprising 4-methyl-4-hydroxymethyl-1-phenyl-3-pyrazolidone and a hydroquinone silver halide developing agent.
Claim 21
Dependent Claim
45 words
A method of developing and stabilizing an image in a heat-developable and heat-stabilizable photographic element as defined in claim 1 comprising heating said element to a temperature within the range of about 90° C. to about 200° C. for about 1 to about 60 seconds.
Claim 22
Independent Claim
85 words
A method of developing and stabilizing an image in a heat-developable and heat-stabilizable photographic element comprising a support having thereon a layer comprising photographic silver halide, a polymeric binder, a silver halide developing agent and a stabilizing concentration of an activator-stabilizer which is a compound selected from the group consisting of 2-amino-2-thiazolinium trichloroacetate, bis(2-amino-2-thiazolinium)oxalacetate, and combinations of these thiazolinium compounds, comprising heating said element to a temperature within the range of about 90° C. to about 160° C. for about 1 to about 4 seconds.
Claim 23
Independent Claim
85 words
A method of developing and stabilizing an image in a heat-developable and heat-stabilizable photographic element comprising a support having thereon a layer comprising photographic silver halide, a polymeric binder, a silver halide developing agent and a stabilizing concentration of an activator-stabilizer which is a compound selected from the group consisting of 2-amino-2-thiazolinium trichloroacetate, bis(2-amino-2-thiazolinium)oxalacetate, and combinations of these thiazolinium compounds, comprising heating said element to a temperature within the range of about 90° C. to about 160° C. for about 1 to about 4 seconds.
Claim 24
Independent Claim
79 words
A method of developing and stabilizing an image in a photographic element comprising a support having thereon in reactive association a photographic silver salt, a photographic silver salt developing agent, and a stabilizing concentration of an activator-stabilizer which is a carboxylate selected from the group consisting of 2-amino-2-thiazolinium carboxylates, 4,5-dihydro-6H-1,3-thiazin-3-ium carboxylates and combinations thereof comprising heating said element to a temperature within the range of about 90° C. to about 200° C. for about 1 to about 60 seconds.
Claim 25
Independent Claim
79 words
A method of developing and stabilizing an image in a photographic element comprising a support having thereon in reactive association a photographic silver salt, a photographic silver salt developing agent, and a stabilizing concentration of an activator-stabilizer which is a carboxylate selected from the group consisting of 2-amino-2-thiazolinium carboxylates, 4,5-dihydro-6H-1,3-thiazin-3-ium carboxylates and combinations thereof comprising heating said element to a temperature within the range of about 90° C. to about 200° C. for about 1 to about 60 seconds.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |