US3867151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
General purpose monobath
Assignee: DELAWARE CAMERA MART Inc
•
Filing: 1973-05-10
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Granted: 1975-02-18
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Expires: 1993-05-10
Abstract
Abstract A monobath composition for the combined developing and fixing of silver halide photographic emulsions comprises four developing agents, one each selected from the following classes - (a) 3pyrazolidones; (b) aminophenols; (c) dihydroxybenzenes; and (d) enediols - and a silver halide solvent. By varying the monobath temperature and the extent of agitation, the composition, without reformulation, is effective in producing satisfactory images with all film emulsions without film speed loss.
Inventors
- 👤 Jerome Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:43
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/383
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
38 words
AN AQUEOUS COMPOSITION FOR THE COMBINED DEVELOPING AND FIXING OF EXPOSED SILVER HALIDE PHOTOGRAPHIC EMULSIONS, HAVING A PH IN THE RANGE 9.5 - 10.75, COMPRISING THE FOLLOWING INGREDIENTS IN THE WEIGHT PROPORTION RANGES INDICATED PER LITER OF COMPOSITION:
Claim 2
Dependent Claim
38 words
AN AQUEOUS COMPOSITION FOR THE COMBINED DEVELOPING AND FIXING OF EXPOSED SILVER HALIDE PHOTOGRAPHIC EMULSIONS, HAVING A PH IN THE RANGE 9.5 - 10.75, COMPRISING THE FOLLOWING INGREDIENTS IN THE WEIGHT PROPORTION RANGES INDICATED PER LITER OF COMPOSITION:
Claim 3
Dependent Claim
21 words
A composition, as claimed in claim 1, wherein said 3-pyrazolidone developer is selected from developing agents having the following chemical structure:
Claim 4
Dependent Claim
12 words
A composition, as claimed in claim 2, wherein said 3-pyrazolidone is 1-phenyl-3-pyrazolidone.
Claim 5
Dependent Claim
19 words
A composition, as claimed in claim 1, wherein said enediol is selected from tetramethyl reduction acid and ascorbic acid.
Claim 6
Dependent Claim
14 words
A composition, as claimed in claim 1, wherein said aminophenol developer is 2,4-diaminophenol dihydrochloride.
Claim 7
Dependent Claim
21 words
A composition, as claimed in claim 1, comprising the following ingredients in the weight proportion ranges indicated per liter of composition:
Claim 8
Dependent Claim
37 words
A composition, as claimed in claim 1, wherein said dihydroxybenzene is hydroquinone, said 3-pyrazolidone is 1-phenyl-3-pyrazolidone, said enediol is selected from the group consisting of tetramethyl reductic acid and ascorbic acid, and said aminophenol is 2,4-diaminophenol dihydrochloride.
Claim 9
Dependent Claim
19 words
A COMPOSITION, AS CLAIMED IN CLAIM 7, WHEREIN SAID ALKAGANIC SULFITE PRESERVATIVE IS SELECTED FROM SODIUM AND POTASSIUM SULFITE.
Claim 10
Dependent Claim
18 words
A COMPOSITION, AS CLAIMED IN CLAIM 7, WHEREIN SAID ALKALINE AGENT IS SELECTED FROM SODIUM AND POTASSIUM HYDROXIDE.
Claim 11
Dependent Claim
17 words
A composition, as claimed in claim 7, wherein said restrainer is selected from sodium and potassium bromide.
Claim 12
Dependent Claim
17 words
A composition, as claimed in claim 7, wherein said pH is in the range 9.8 - 10.3
Claim 13
Dependent Claim
67 words
A composition, as claimed in claim 7, further including at least one of the following additional ingredients: a. up to 1 1/2 grams per liter of a grain reducer selected from sodium and potassium thiOcyanate; b. up to 0.1 gram per liter of benzotriazole; c. up to 3 grams per liter of ammonium thiosulfate; and d. up to 2 grams per liter of a water softening agent.
Claim 14
Dependent Claim
21 words
A composition, as claimed in claim 12, wherein said additional ingredient is a grain reducer selected from sodium and potassium thiocyanate.
Claim 15
Dependent Claim
13 words
A composition, as claimed in claim 12, wherein said additional ingredient is benzotriazole.
Claim 16
Dependent Claim
14 words
A composition, as claimed in claim 12, wherein said additional ingredient is ammonium thiosulfate.
Claim 17
Dependent Claim
16 words
A composition, as claimed in claim 12, wherein said additional ingredient is a water softening agent.
Claim 18
Dependent Claim
15 words
A composition, as claimed in claim 15, wherein said water softening agent is sodium hexametaphosphate.
Claim 19
Dependent Claim
28 words
An aqueous composition for the combined developing and fixing of exposed silver halide photographic emulsions comprising the following ingredients in the weight proportions indicated per liter of composition:
Claim 20
Dependent Claim
28 words
An aqueous composition for the combined developing and fixing of exposed silver halide photographic emulsions comprising the following ingredients in the weight proportions indicated per liter of composition:
Claim 21
Dependent Claim
48 words
A process for simultaneously developing and fixing an imagewise exposed silver halide emulsion comprising contacting said emulsion with an aqueous monobath composition having a pH in the range of 8 - 9.5, said monobath comprising the following ingredients in the weight proportion ranges indicated per liter of composition:
Claim 22
Dependent Claim
48 words
A process for simultaneously developing and fixing an imagewise exposed silver halide emulsion comprising contacting said emulsion with an aqueous monobath composition having a pH in the range of 8 - 9.5, said monobath comprising the following ingredients in the weight proportion ranges indicated per liter of composition:
Claim 23
Dependent Claim
21 words
A process, as claimed in claim 19, wherein said 3-pyrazolidone developer is selected from developing agents having the following chemical structure:
Claim 24
Dependent Claim
37 words
A process, as claimed in claim 19, wherein said dihydroxybenzene is hydroquinone, said 3-pyrazolidone is 1-phenyl-3-pyrazolidone, said enediol is selected from the group consisting of tetramethyl reductic acid and ascorbic acid and said aminophenol is 2,4-diaminophenol dihydrochloride.
Claim 25
Dependent Claim
17 words
A process, as claimed in claim 21, wherein said pH is in the range 9.8 - 10.3.
Claim 26
Dependent Claim
67 words
A process, as claimed in claim 21, further including at least one of the following additional ingredients: a. up to 2 1/2 grams per liter of a grain reducer selected from sodium and potassium thiocyanate; b. up to 0.1 gram per liter of benzotriazole; c. up to 3 grams per liter of ammonium thiosulfate; and d. up to 2 grams per liter of a water softening agent.
Claim 27
Dependent Claim
24 words
A process, as claimed in claim 23, wherein said monobath composition comprises the following ingredients in the weight proportions indicated per liter of composition:
Claim 28
Dependent Claim
18 words
A process, as claimed in claim 19, further including the step of agitating said monobath to said emulsion.
Claim 29
Dependent Claim
18 words
A process, as claimed in claim 25, wherein said monobath temperature is in the range 60* - 72*F.
Claim 30
Dependent Claim
23 words
A process, as claimed in claim 19, further including the step of rinsing the developed and fixed emulsion in an aqueous hardening bath.
Claim 31
Dependent Claim
24 words
A process, as claimed in claim 27, wherein said hardening bath includes a silver halide emulsion hardener selected from acid alum and aldehyde hardeners.
Claim 32
Dependent Claim
25 words
A process, as claimed in claim 28, wherein said hardening bath comprises the fOllowing ingredients in the weight proportions indicated per liter of hardening bath:
Claim 33
Dependent Claim
43 words
A dry mixture, all ingredients of which are adapted to be admixed and dissolved in water to produce a solution having a pH in the range 9.5 to 10.75 for the combined developing and fixing of an exposed silver halide photographic emulsion comprising:
Claim 34
Dependent Claim
43 words
A dry mixture, all ingredients of which are adapted to be admixed and dissolved in water to produce a solution having a pH in the range 9.5 to 10.75 for the combined developing and fixing of an exposed silver halide photographic emulsion comprising:
Claim 35
Dependent Claim
38 words
A dry mixture, as claimed in claim 30, wherein said dihydroxybenzene is hydroquinone, said 3-pyrazolidone is 1-phenyl-3-pyrazolidone, said enediol is selected from the group consisting of tetramethyl reductic acid and ascorbic acid and said aminophenol is 2,4-diaminophenol dihydrochloride.
Claim 36
Dependent Claim
25 words
A process, as claimed in claim 27, wherein said hardening bath comprises the following ingredients in the weight proportions indicated per liter of hardening bath:
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |