Patent US4168166A successfully refreshed from Google Patents.
US4168166A
Expired / Lapsed
US
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Photographic processing composition comprising borate
Assignee: Polaroid Corp
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Filing: 1978-04-04
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Granted: 1979-09-18
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Expires: 1998-04-04
Abstract
Abstract A processing composition adapted for use in a silver diffusion transfer film unit which includes an alkali soluble borate compound.
Inventors
- 👤 Edwin H. Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:26
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C8/30
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
A photographic processing composition adapted for use with a silver diffusion transfer film unit which comprises an aqueous alkaline solution having a pH of at least about 12, a silver halide developing agent, a silver halide solvent and a borate which is soluble in said aqueous alkaline solution wherein said borate is present at a level of about 0.25 mmol to 15 mmol of boron per 10 cc of processing composition.
Claim 2
Dependent Claim
71 words
A photographic processing composition adapted for use with a silver diffusion transfer film unit which comprises an aqueous alkaline solution having a pH of at least about 12, a silver halide developing agent, a silver halide solvent and a borate which is soluble in said aqueous alkaline solution wherein said borate is present at a level of about 0.25 mmol to 15 mmol of boron per 10 cc of processing composition.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said borate is sodium tetraborate decahydrate.
Claim 4
Dependent Claim
29 words
The composition of claim 2 wherein said sodium tetraborate decahydrate is present at a level of about 0.75 to 5 mmol of boron per 10 cc of said composition.
Claim 5
Dependent Claim
30 words
The composition as defined in claim 3 wherein said sodium borate decahydrate is present at a level of about 1 mmol of boron per 10 cc of said processing composition.
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
59 words
A photographic processing composition having a pH of at least about 12 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-dihydroxy-pyrimidine, hydroxyethyl cellulose and sodium tetraborate decahydrate wherein said sodium tetraborate is present at a level of about 1 mmol per 10 cc of said composition.
Claim 11
Dependent Claim
59 words
A photographic processing composition having a pH of at least about 12 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-dihydroxy-pyrimidine, hydroxyethyl cellulose and sodium tetraborate decahydrate wherein said sodium tetraborate is present at a level of about 1 mmol per 10 cc of said composition.
Claim 12
Independent Claim
91 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 comprising an aqueous alkaline solution having a pH of at least about 12, a silver halide developing agent, a silver halide solvent and a borate which is soluble in said aqueous alkaline solution; said borate being present at a level of about 0.25 mmol to 15 mmol of boron per 10 cc of said processing composition.
Claim 13
Independent Claim
91 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 comprising an aqueous alkaline solution having a pH of at least about 12, a silver halide developing agent, a silver halide solvent and a borate which is soluble in said aqueous alkaline solution; said borate being present at a level of about 0.25 mmol to 15 mmol of boron per 10 cc of said processing composition.
Claim 14
Dependent Claim
12 words
The method of claim 10 wherein said borate is sodium tetraborate decahydrate.
Claim 15
Dependent Claim
27 words
The method of claim 11 wherein said sodium borate is present at a level of about 1 mmol of borate per 10 cc of said processing composition.
Claim 16
Dependent Claim
19 words
The method of claim 10 which includes the step of drying said film unit without removing said processing composition.
Claim 17
Dependent Claim
14 words
The method of claim 10 wherein said film unit includes an additive color screen.
Claim 18
Dependent Claim
14 words
The method of claim 10 wherein said silver precipitating nuclei are noble metal nuclei.
Claim 19
Dependent Claim
13 words
The method of claim 15 wherein said noble metal nuclei are palladium nuclei.
Claim 20
Dependent Claim
13 words
The method of claim 10 wherein said processing composition includes a polymeric thickener.
Claim 21
Dependent Claim
12 words
The method of claim 17 wherein said polymeric thickener is hydroxyethyl cellulose.
Claim 22
Independent Claim
90 words
The method which comprises contacting an 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 aqueous sodium hydroxide solution, having a pH of at least about 12, hydroxyethyl cellulose, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxy-pyrimidine, hydroxyethyl cellulose and sodium tetraborate decahydrate at a level of about 4.2 mmol of boron per 10 cc of said processing composition.
Claim 23
Independent Claim
90 words
The method which comprises contacting an 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 aqueous sodium hydroxide solution, having a pH of at least about 12, hydroxyethyl cellulose, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxy-pyrimidine, hydroxyethyl cellulose and sodium tetraborate decahydrate at a level of about 4.2 mmol of boron per 10 cc of said processing composition.
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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) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |