US3617283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous bleach-fixing method in color photography
Assignee: Fujifilm Holdings Corp
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Filing: 1967-05-08
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Granted: 1971-11-02
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Expires: 1987-05-08
Abstract
Abstract WHERE R1 and R2 are an alkyl group, an hydroxyalkyl group, an aryl group, or an allyl group, or R1 and R2 can form together a hetrocyclic ring, and R3 is an alkyl group, an hydroxyalkyl group or an allyl group when R1 and R2 do not form a heterocyclic ring and is hydrogen, an alkyl group or an hydroxyalkyl group when R1 and R2 form a heterocyclic ring. In processing photographic light-sensitive color material, bleaching can be promoted without the occurrence of color stains by incorporating, in a bleach-fixing solution containing a watersoluble iron complex salt or a processing solution, between color development and bleach-fixing a compound shown by the general formula
Inventors
- 👤 Reiichi Ohi
- 👤 Hiroyuki Amano
- 👤 Haruhiko Iwano
- 👤 Kazuo Shirasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:52
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42; G03C7/421
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
The process of claim l wherein at least one processing prior to said bleach-fixing and subsequent to said color development is a stop-fixing process.
Claim 2
Dependent Claim
28 words
The process of claim 1 wherein sAid water-soluble bleach accelerating compound is present in said bleach-fixing bath in an amount of from about 0.3 to about 5 grams/liter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |