Patent US3615488A successfully refreshed from Google Patents.
US3615488A
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Photographic processing composition and process comprising cysteine and an aldehyde bisulfite
Assignee: Eastman Kodak Co
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Filing: 1970-03-18
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Granted: 1971-10-26
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Expires: 1990-03-18
Abstract
Abstract Photographic-processing composition for developing photographic elements in the presence of a developing agent such as hydroquinone, comprising cysteine, an aldehyde bisulfite such as sodium formaldehyde bisulfite and an organic antifoggant. The composition is advantageously employed in a continuous transport processing machine.
Inventors
- 👤 Frank J Drago
- 👤 Clinton Van Grol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
11 words
The composition of claim 1 which additionally comprises an organic antifoggant.
Claim 2
Dependent Claim
11 words
The composition of claim 2, said composition being an aqueous solution.
Claim 3
Dependent Claim
90 words
The composition of claim 3 wherein said developing agent is present in a concentration of from about 0.05 to about 0.50 mole per liter of developer composition, said cysteine is present in a range of from about 0.1 to about 0.9 grams per liter of developer composition, said aldehyde bisulfite Is present in a range of from about 0.05 to about 1.0 moles per liter of developer composition and said organic antifoggant is present in a range of from about 0.1 to about 2.0 grams per liter of developer composition.
Claim 4
Dependent Claim
22 words
The composition of claim 2 wherein said developing agent is a dihydroxybenzene developing agent and said monoaldehyde bisulfite is a formaldehyde bisulfite.
Claim 5
Dependent Claim
28 words
The composition of claim 5 wherein said dihydroxybenzene developing agent is hydroquinone, said formaldehyde bisulfite is sodium formaldehyde bisulfite and said organic antifoggant is a nitro-sustituted organic antifoggant.
Claim 6
Dependent Claim
18 words
The composition of claim 6 wherein said nitrosubstituted organic antifoggant is one of 5-nitroindazole, 5-nitrobenzimidazole and 5-nitrobenzimidazole nitrate.
Claim 7
Dependent Claim
40 words
The composition of claim 1 wherein the pH is in a range of from about 10 to about 11.2 and additionally comprises free sulfite in the range of from about 2 to about 40 grams per liter of developer composition.
Claim 8
Dependent Claim
74 words
The composition of claim 6 wherein said hydroquinone is present in a concentration of about 0.3 mole per liter of developer composition, said cysteine is present in a concentration of about 0.003 mole per liter of developer composition, said sodium formaldehyde bisulfite is present in a concentration of about 0.3 mole per liter of developer composition and said organic antifoggant is present in a concentration of about 0.005 mole per liter of developer composition.
Claim 9
Dependent Claim
45 words
In a continuous unidirectional fast access high-temperature transport process for developing and processing an exposed, high-contrast photographic silver halide element, the improvement comprising developing said element in a liquid developer composition comprising: a. a silver halide developing agent, b. cysteine, and c. a monoaldehyde bisulfite.
Claim 10
Dependent Claim
16 words
In a continuous process of claim 10 wherein said developer composition additionally comprises an organic antifoggant.
Claim 11
Dependent Claim
19 words
In a continuous process of claim 11 wherein said developer composition is in the form of an aqueous solution.
Claim 12
Dependent Claim
95 words
In a continuous process of claim 12 wherein said developing agent is present in a range in a concentration of from about 0.05 to about 0.50 mole per liter of developer composition, said cysteine is present in a range of from about 0.1 to about 0.9 grams per liter of developer composition, said aldehyde bisulfite is present in a range of from about 0.05 to about 1.0 moles per liter of developer composition and said organic antifoggant is present in a range of from about 0.1 to about 2.0 grams per liter of developer composition.
Claim 13
Dependent Claim
24 words
In a continuous process of claim 13 wherein said developing agent is a dihydroxybenzene developing agent and said monoaldehyde bisulfite is a formaldehyde bisulfite.
Claim 14
Dependent Claim
29 words
In a process of claim 14 wherein said dihydroxybenzene developing agent is hydroquinone, said formaldehyde bisulfite is sodium formaldehyde bisulfite and said organic antifoggant is a nitro-substituted organic antifoggant.
Claim 15
Dependent Claim
20 words
The process of claim 15 wherein said nitrosubstituted organic antifoggant is one of 5-nitroindazole, 5-nitrobenzimidazole, 6-nitrobenzimidazole nitrate or 5-nitrobenzimidazole nitrate.
Claim 16
Dependent Claim
34 words
The process of claim 12 wherein said developing composition is at a pH of about 10 to about 11.2 and comprises from about 2 to about 40 grams per liter of a free sulfite.
Claim 17
Dependent Claim
100 words
The process of claim 10 wherein said photographic element comprises a silver halide emulsion in which the halide comprises at least 60 mole percent chloride. 19 The process of claim 15 wherein said hydroquinone is present in the concentration of about 0.3 mole per liter of developer composition, said cysteine is present in a concentration of about 0.003 mole per liter of developer composition, said sodium formaldehyde bisulfite is present in a concentration of about 0.3 mole per liter of developer composition and said organic antifoggant is present in a concentration of about 0.005 mole per liter of developer composition.
Claim 18
Dependent Claim
13 words
The process of claim 10 wherein said photographic element is transported by rollers.
Claim 19
Dependent Claim
35 words
In a process of processing an exposed, high-contrast photographic element, the improvement comprising developing said element in a liquid developer composition comprising: a. a silver halide developing agent, b. cysteine, and c. a monoaldehyde bisulfite.
Claim 20
Dependent Claim
22 words
The process of claim 21 where said developer composition additionally comprises an organic antifoggant and said monoaldehyde bisulfite is sodium formaldehyde bisulfite.
Claim 21
Dependent Claim
18 words
An essentially bromide-free alkaline photographic activator solution comprising a monoaldehyde bisulfite, cystine and at least one organic antifoggant.
Claim 22
Dependent Claim
22 words
An alkaline photographic activator solution of claim 23 wherein said organic antifoggant is nitrosubstituted and said monoaldehyde bisulfite is sodium formaldehyde bisulfite.
Claim 23
Dependent Claim
36 words
In a method of processing an exposed gelatino photographic silver halide element, said element containing a silver halide developing agent, the improvement comprising processing said element in the presence of an activator solution of claim 21.
Claim 24
Dependent Claim
36 words
In a method of processing an exposed gelatino photographic silver halide element, said element containing a silver halide developing agent, the improvement comprising processing said element in the presence of an activator solution of claim 24.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |