US4529687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method to form color image
Assignee: Fujifilm Holdings Corp
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Filing: 1983-10-07
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Granted: 1985-07-16
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Expires: 2003-10-07
Abstract
Abstract An image forming method to get high density image without any fog is disclosed. The method is suitable for a low silver containing photographic material. The method include the color developing step with a small amount of monobath developing intensifying solution, wherein the color developing is carried out under the existence of an anion exchanger and/or cationic polymer. The monobath developing intensifying solution may be in contact with the anion exchanger. On the other hand, the cationic polymer may be contained in the photographic material.
Inventors
- 👤 Hiroyuki Hirai
- 👤 Koichi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:38
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3017; G03C7/302; Y; Y10; Y10S; Y10S430/00; Y10S430/144
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
In the method to form color image which uses a low silver containing photographic material, in which the photographic material is developed in the presence of nitrogen containing heterocyclic compounds using a monobath developing intensifying solution, which contains substantially neither Br - nor I - ions, but contains both H 2 O 2 or compounds which can release H 2 O 2 and color developing agents; the improved method to form color image which is characterized by the process that the monobath developing intensifying process is carried out in the presence of an anion exchange resin.
Claim 2
Dependent Claim
96 words
In the method to form color image which uses a low silver containing photographic material, in which the photographic material is developed in the presence of nitrogen containing heterocyclic compounds using a monobath developing intensifying solution, which contains substantially neither Br - nor I - ions, but contains both H 2 O 2 or compounds which can release H 2 O 2 and color developing agents; the improved method to form color image which is characterized by the process that the monobath developing intensifying process is carried out in the presence of an anion exchange resin.
Claim 3
Dependent Claim
23 words
The method to form color image as in claim 1, wherein said anion exchange resin is a strong base type anion exchange resin.
Claim 4
Dependent Claim
38 words
The method to form color image as in claim 2, wherein said anion exchange resin is founded on polystyrene or on polystyrene-divinyl benzene copolymer, and has a dimethylethanolammonium group or a trimethylammonium group as an active exchange group.
Claim 5
Dependent Claim
30 words
The method to form color image as in claim 1, wherein said anion exchange resin is used in an amount of 1-500 g per 1 l of developing intensifying solution.
References Cited (Backward Citations)
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Cited
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Cited
US4147550A
Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |