US4267255A
Expired / Lapsed
US
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Novel photographic processing composition
Assignee: Polaroid Corp
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Filing: 1979-12-12
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Granted: 1981-05-12
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Expires: 1999-12-12
Abstract
Abstract A processing composition adapted for use in a silver diffusion transfer film unit which comprises an aqueous alkaline solution, a silver halide developing agent and a surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 repeating units of ethylene oxide per hydrophobe.
Inventors
- 👤 Karl J. Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:57
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
57 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 and surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 ethylene oxide units per hydrophobe wherein said hydrophobe is a fluorinated hydrocarbon or an organo silicone.
Claim 2
Dependent Claim
57 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 and surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 ethylene oxide units per hydrophobe wherein said hydrophobe is a fluorinated hydrocarbon or an organo silicone.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein said film unit comprises an elongated strip adapted to be wound upon itself.
Claim 4
Dependent Claim
31 words
The composition of claim 1 wherein said surfactant is present at a level of about 0.25 to 5.0% by weight of active material based on the weight of the processing composition.
Claim 5
Dependent Claim
25 words
The composition of claim 3 wherein said surfactant is present at a level of about 0.5% by weight based on the weight of said composition.
Claim 6
Dependent Claim
21 words
The composition of claim 1 wherein said surfactant contains an average of about 11 units of ethylene oxide units per hydrophobe.
Claim 7
Dependent Claim
15 words
The composition of claim 1 wherein said silver halide developing agent is tetramethyl reductic acid.
Claim 8
Dependent Claim
11 words
The composition of claim 1 which includes a silver halide solvent.
Claim 9
Dependent Claim
12 words
The composition of claim 7 wherein said silver halide solvent is 2-methylthiomethyl-4,6-dihydroxypyrimidine.
Claim 10
Dependent Claim
11 words
The composition of claim 1 which includes a polymeric thickening agent.
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein said film unit is an additive color diffusion transfer film unit.
Claim 12
Dependent Claim
60 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-dihydroxy-pyrimidine, hydroxyethyl cellulose and a nonionic surfactant of the formula CF.sub.3 (CF.sub.2).sub.m (CH.sub.2).sub.2 ---O(CH.sub.2 CH.sub.2 O).sub.n H wherein said surfactant is a mixture and n averages about 11 and m is 5, 7 and 9.
Claim 13
Dependent Claim
60 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-dihydroxy-pyrimidine, hydroxyethyl cellulose and a nonionic surfactant of the formula CF.sub.3 (CF.sub.2).sub.m (CH.sub.2).sub.2 ---O(CH.sub.2 CH.sub.2 O).sub.n H wherein said surfactant is a mixture and n averages about 11 and m is 5, 7 and 9.
Claim 14
Independent Claim
80 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 photosensitive silver halide layer; with a photographic processing composition comprising an aqueous alkaline solution, a silver halide developing agent and a surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 units of ethylene oxide per hydrophobe wherein said hydrophobe is a fluorinated hydrocarbon or an organo silicone.
Claim 15
Independent Claim
80 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 photosensitive silver halide layer; with a photographic processing composition comprising an aqueous alkaline solution, a silver halide developing agent and a surfactant comprising a hydrophobe and a polyethylene oxide portion containing an average of about 5-25 units of ethylene oxide per hydrophobe wherein said hydrophobe is a fluorinated hydrocarbon or an organo silicone.
Claim 16
Dependent Claim
31 words
The method of claim 12 wherein said film unit comprises an elongated strip adapted to be wound upon itself and which includes the step of winding said film unit upon itself.
Claim 17
Dependent Claim
30 words
The method of claim 12 wherein said surfactant is present at a level of about 0.25 to 5.0% active material by weight based on the weight of said processing composition.
Claim 18
Dependent Claim
18 words
The method of claim 14 wherein said surfactant is present at a level of about 0.5% by weight.
Claim 19
Dependent Claim
20 words
The method of claim 12 wherein said surfactant contains an average of about 11 units of ethylene oxide per hydrophobe.
Claim 20
Dependent Claim
13 words
The method of claim 12 wherein said developing agent is tetramethyl reductic acid.
Claim 21
Dependent Claim
14 words
The method of claim 12 wherein said processing composition includes a silver halide solvent.
Claim 22
Dependent Claim
12 words
The method of claim 18 wherein said silver halide solvent is 2-methylthiomethyl-4,6-dihydroxypyrimidine.
Claim 23
Dependent Claim
14 words
The method of claim 12 wherein said film unit includes an additive color screen.
Claim 24
Dependent Claim
14 words
The method of claim 12 wherein said silver precipitating nuclei are noble metal nuclei.
Claim 25
Dependent Claim
13 words
The method of claim 21 wherein said noble metal nuclei are palladium nuclei.
Claim 26
Dependent Claim
13 words
The method of claim 12 wherein said processing composition includes a polymeric thickener.
Claim 27
Dependent Claim
12 words
The method of claim 23 wherein said polymeric thickener is hydroxyethyl cellulose.
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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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |