US4066461A
Expired / Lapsed
US
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Color photographic process
Assignee: Fujifilm Holdings Corp
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Filing: 1976-10-27
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Granted: 1978-01-03
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Expires: 1996-10-27
Abstract
Abstract A color photographic process which comprises processing silver halide color photographic materials using a color developer containing a 2-alkyne-1-ol represented by the general formula: ##STR1## wherein R 1 and R 2 each represents a hydrogen atom, an alkyl group, a hydroxyalkyl group, an aminoalkyl group, a carboxyalkyl group, or a formylalkyl group, and R 1 and R 2 may be the same or different. By using the above compound in a color photographic process, the speed of color development can be effectively promoted without increasing fog, and, further, the stability of the color developer is improved.
Inventors
- 👤 Isao Shimamura
- 👤 Shoji Ishiguro
- 👤 Junkichi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:26
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
A color photographic process which comprises processing imagewise exposed silver halide color photographic materials by a p-phenylene-diamine color developer containing a 2-alkyne-1-ol represented by the general formula ##STR4## wherein R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, an alkyl group, a hydroxyalkyl group, an aminoalkyl group, a carboxyalkyl group, or a formylalkyl group.
Claim 2
Dependent Claim
63 words
A color photographic process which comprises processing imagewise exposed silver halide color photographic materials by a p-phenylene-diamine color developer containing a 2-alkyne-1-ol represented by the general formula ##STR4## wherein R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, an alkyl group, a hydroxyalkyl group, an aminoalkyl group, a carboxyalkyl group, or a formylalkyl group.
Claim 3
Dependent Claim
35 words
The color photographic process of claim 1 in which said color developer contains said compound of the general formula in an amount of about 0.1 to about 100 g per liter of the color developer.
Claim 4
Dependent Claim
27 words
The color photographic of claim 1 in which said color developer contains the compound of the general formula together with another development accelerator different from the 2-alkyne-1-ol.
Claim 5
Dependent Claim
14 words
The color photographic process of claim 3 where the development accelerator is benzyl alcohol.
Claim 6
Dependent Claim
25 words
The color photographic process of claim 3 where any alkyl group or moiety as R 1 and R 2 has 1 to 4 carbon atoms.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |