Patent US4324853A successfully refreshed from Google Patents.
US4324853A
Expired / Lapsed
US
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Photographic processing composition containing polyol
Assignee: Polaroid Corp
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Filing: 1979-07-18
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Granted: 1982-04-13
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Expires: 1999-07-18
Abstract
Abstract A processing composition adapted for use in a silver diffusion transfer process which includes a saturated polyol containing at least 3 hydroxyl groups wherein each hydroxyl group is no more than 3 carbon atoms away from another hydroxyl group.
Inventors
- 👤 Michael Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:27
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/36; G03C8/365
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
50 words
A photographic processing composition adapted for use with a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent, a silver halide solvent and glycerol, wherein said glycerol is present at a level of about 0.1-1.0 g per 10 cc of said processing composition.
Claim 2
Dependent Claim
50 words
A photographic processing composition adapted for use with a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent, a silver halide solvent and glycerol, wherein said glycerol is present at a level of about 0.1-1.0 g per 10 cc of said processing composition.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein said glycerol is present at a level of about 0.2 g per 10 cc of said composition.
Claim 4
Dependent Claim
19 words
The composition as defined in claim 1 which includes a borate which is soluble in said aqueous alkaline solution.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein said borate is sodium tetraborate decahydrate.
Claim 6
Dependent Claim
15 words
The composition of claim 1 wherein said silver halide developing agent is tetramethyl reductic acid.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein said silver halide solvent is 2-methylthiomethyl-4,6-dihydroxypyrimidine.
Claim 8
Dependent Claim
13 words
The composition as defined in claim 1 which includes a polymeric thickening agent.
Claim 9
Dependent Claim
17 words
The composition of claim 1 wherein said film unit is an additive color diffusion transfer film unit.
Claim 10
Dependent Claim
33 words
A photographic processing composition adapted for use with an additive color diffusion transfer film unit which comprises an aqueous sodium hydroxide solution, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxypyrimidine, hydroxyethyl cellulose, glycerol and sodium tetraborate decahydrate.
Claim 11
Dependent Claim
33 words
A photographic processing composition adapted for use with an additive color diffusion transfer film unit which comprises an aqueous sodium hydroxide solution, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxypyrimidine, hydroxyethyl cellulose, glycerol and sodium tetraborate decahydrate.
Claim 12
Independent Claim
82 words
The method which comprises contacting an exposed silver diffusion transfer film unit which comprises a support carrying on one surface, a layer comprising silver precipitating nuclei, and a silver halide layer; with a photographic processing composition adapted for use with a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent, a silver halide solvent and glycerol, wherein said glycerol is present at a level of about 0.1-1.0 g per 10 cc of said processing composition.
Claim 13
Independent Claim
82 words
The method which comprises contacting an exposed silver diffusion transfer film unit which comprises a support carrying on one surface, a layer comprising silver precipitating nuclei, and a silver halide layer; with a photographic processing composition adapted for use with a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent, a silver halide solvent and glycerol, wherein said glycerol is present at a level of about 0.1-1.0 g per 10 cc of said processing composition.
Claim 14
Dependent Claim
24 words
The method of claim 10 wherein said glycerol is present at a level of about 0.2 g per 10 cc of said processing composition.
Claim 15
Dependent Claim
19 words
The method of claim 10 which includes the step of drying said film unit without removing said processing composition.
Claim 16
Dependent Claim
14 words
The method of claim 10 wherein said film unit includes an additive color screen.
Claim 17
Dependent Claim
14 words
The method of claim 10 wherein said silver precipitating nuclei are noble metal nuclei.
Claim 18
Dependent Claim
13 words
The method of claim 12 wherein said noble metal nuclei are palladium nuclei.
Claim 19
Dependent Claim
39 words
The method of claim 10 wherein said processing composition includes a borate which is soluble in said aqueous alkaline solution and which is present at a level of about 0.25 to 15 mmol per 10 cc of processing composition.
Claim 20
Dependent Claim
13 words
The method of claim 9 wherein said processing composition includes a polymeric thickener.
Claim 21
Dependent Claim
12 words
The method of claim 15 wherein said polymeric thickener is hydroxyethyl cellulose.
Claim 22
Independent Claim
66 words
The method which comprises contacting an exposed additive color diffusion transfer film unit which comprises a transparent support carrying, in order, an additive color screen; a layer comprising palladium metal silver precipitating nuclei and gelatin; a photosensitive silver halide emulsion layer; and an anti-halation layer; with a processing composition comprising an aquous sodium hydroxide solution, hydroxyethyl cellulose, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxypyrimidine, sodium tetraborate decahydrate and glycerol.
Claim 23
Independent Claim
66 words
The method which comprises contacting an exposed additive color diffusion transfer film unit which comprises a transparent support carrying, in order, an additive color screen; a layer comprising palladium metal silver precipitating nuclei and gelatin; a photosensitive silver halide emulsion layer; and an anti-halation layer; with a processing composition comprising an aquous sodium hydroxide solution, hydroxyethyl cellulose, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxypyrimidine, sodium tetraborate decahydrate and glycerol.
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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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |