US3615522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for development of multilayer color photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1969-07-15
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Granted: 1971-10-26
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Expires: 1989-07-15
Abstract
Abstract Method of processing a silver halide multilayer color photographic material which comprises the incorporation of a mercaptotriazole compound into one of the processing solutions. Such incorporation causes selective inhibition of the development of the uppermost emulsion layer, resulting in a developed material possessing improved, balanced contrast.
Inventors
- 👤 Reiichi Ohi
- 👤 Haruhiko Iwano
- 👤 Tadao Shishido
- 👤 Isao Shimamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:31
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
21 words
The method of claim 2 wherein said treatment is conducted at a temperature of from about 30 to about 70* C.
Claim 2
Dependent Claim
34 words
The method of claim 2 wherein the concentration of said development-inhibiting compound in said aqueous solution varies from about 1 X 10 6 mole per liter to 1 X 10 2 mole per liter.
Claim 3
Dependent Claim
36 words
The method of claim 2 wherein said silver halide multilayer color photographic material is color reversal film and wherein said developer is at least one member selected from the group consisting of hydroquinone, 1-phenyl-3-pyrazolidone and N-methyl-p-aminophenol.
Claim 4
Dependent Claim
30 words
The method of claim 2 wherein said silver halide multilayer color photographic material is color negative film or color paper and wherein said developer is at least one p-phenylene-diamine derivative.
Claim 5
Dependent Claim
31 words
The method of claim 6 wherein said p-phenylene-diamine derivative is at least one member selected from the group consisting of N,N-diethyl-p-phenylenediamine sulfite, N,N-diethyl-3-methyl-p-phenylenediamine hydrochloride, 4-amino-3-methyl-N-ethyl-N-methanesulfonamideethylaniline sulfate, 4-amino-3-methyl-N-ethyl-N-hydroxyethylaniline sulfate or N-ethyl-N-hydroxyethyl-p-phenylenediamine sulfate.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein said alkyl group of R1, R2 and R4 has from one to 20 carbon atoms.
Claim 7
Dependent Claim
45 words
In a method for developing a silver halide multilayer color photographic material, the improvement which consists essentially of treating said material with a preprocessing solution consisting essentially of an aqueous solution of a compound which hardens gelatin and a development-inhibiting compound represented by the formula:
Claim 8
Dependent Claim
35 words
The method of claim 9 wherein said development inhibiting compound is a member selected from the group consisting of 3-mercapto-4-phenyl-,2,4-triazole, 3-mercapto-5-methyl-4-phenyl-1, 2,4-triazole, 5-ethyl-3-mercapto-4-phenyl-1,2,4-triazole, 3-mercapto-5-pentyl-4-phenyl-1,2,4-triazole, 4,5-diphenyl-3-mercapto-1,2,4-triazole, 3-mercapto-4-phenyl-5-undecyl-1,2,4-triazole, 4,5-dIethyl-3-mercapto-1,2,4-triazole, 4-ethyl-3-mercapto-5-pentyl-1,2,4-triazole, 4-ethyl-3-mercapto-5-phenyl-1, 2,4-triazole, 5-p-aminophenyl-4-ethyl-3-mercapto-1,2,4-triazole, 5-p-acetoamidephenyl-4-ethyl-3-mercapto-1,2,4-triazole, 5-p-caproamidephenyl-4-ethyl-3-mercapto-1,2,4-triazole and 4-ethyl-5-p-lauroamidephenyl-3-mercapto-1,2,4-triazole.
Claim 9
Dependent Claim
21 words
The method of claim 9 wherein said treatment is conducted at a temperature of from about 30 to about 70* C.
Claim 10
Dependent Claim
35 words
The method of claim 9 wherein the concentration of said development-inhibiting compound in said aqueous solution varies from about 1 X 10 6 mole per liter to about 1 X 10 2 mole per liter.
Claim 11
Dependent Claim
14 words
The method of claim 9 wherein said compound which hardens gelatin is an aldehyde.
Claim 12
Dependent Claim
20 words
The method of claim 13 wherein said aldehyde is selected from the group consisting of formaldehyde, glyoxal, succinaldehyde, and glutaraldehyde.
Claim 13
Dependent Claim
20 words
The method of claim 9 wherein said aqueous solution further contains a salt, a buffering agent and a fog inhibitor.
Claim 14
Dependent Claim
46 words
The method of claim 15 wherein said salt is sodium sulfate, wherein said buffering agent is selected from the group consisting of borax, acetic acid, sodium acetate, sodium hydroxide, sodium carbonate, sulfuric acid and boric acid and wherein said fog inhibitor is an alkali metal halide.
Claim 15
Dependent Claim
21 words
The method of claim 9 wherein said alkyl of said R1, R2 and R4 has from one to 20 carbon atoms.
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 |