US4695529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image-forming process
Assignee: Fujifilm Holdings Corp
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Filing: 1986-10-15
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Granted: 1987-09-22
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Expires: 2006-10-15
Abstract
Abstract An image-forming process is disclosed, which comprises exposing a silver halide color photographic material comprising a support having provided thereon at least one silver halide emulsion layer containing tabular silver halide grains having a diameter-to-thickness ratio of 5 or more, subjecting the exposed photographic material to color development processing, then processing the photographic material in a bath mainly having a bleaching ability and successively in a bath having a bleach-fixing ability.
Inventors
- 👤 Akira Abe
- 👤 Junya Nakajima
- 👤 Toshihiro Nishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:37
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
An image-forming process, which comprises imagewise exposing a silver halide color photographic material comprising a support having provided thereon at least one silver halide emulsion layer containing tabular silver halide grains having a diameter-to-thickness ratio of 5 or more, subjecting the exposed photographic material to color development processing, then processing the photographic material in a bath mainly having a bleaching ability and successively in a bath having a bleach-fixing ability.
Claim 2
Dependent Claim
70 words
An image-forming process, which comprises imagewise exposing a silver halide color photographic material comprising a support having provided thereon at least one silver halide emulsion layer containing tabular silver halide grains having a diameter-to-thickness ratio of 5 or more, subjecting the exposed photographic material to color development processing, then processing the photographic material in a bath mainly having a bleaching ability and successively in a bath having a bleach-fixing ability.
Claim 3
Dependent Claim
37 words
An image-forming process as claimed in claim 1, wherein said bath mainly having a bleaching ability contains a bleaching agent selected from the group consisting of red prussiates, dichromates, persulfates, inorganic ferric salts and organic ferric salts.
Claim 4
Dependent Claim
18 words
An image-forming process as claimed in claim 2, wherein said bleaching agent is a ferric aminopolycarboxylate complex salt.
Claim 5
Dependent Claim
42 words
An image-forming process as claimed in claim 2, wherein said bleaching agent is present in an amount of about 0.1 to about 1 mol per liter of bleaching solution, and the pH of the bleaching solution is about 4.0 to about 8.0.
Claim 6
Dependent Claim
64 words
An image-forming process as claimed in claim 1, wherein said bath mainly having a bleaching ability and/or said bath having a bleach-fixing ability contains a bleaching accelerator selected from the group consisting of mercapto compounds, disulfido bond-containing compounds, thiazolidine derivatives, thiourea derivatives and isothiourea derivatives in an amount from about 1 times 10 -5 to about 10 -1 mol per liter of the bath.
Claim 7
Dependent Claim
22 words
An image-forming process as claimed in claim 1, wherein said diameter-to-thickness ratio of said tabular silver halide grains is 5 to 20.
Claim 8
Dependent Claim
29 words
An image-forming process as claimed in claim 1, which further comprises a water-washing step after processing said material in the bleaching bath and before processing in the bleach-fixing bath.
Claim 9
Dependent Claim
21 words
An image-forming process as claimed in claim 1, which further comprises washing with water and stabilizing said material following bleach-fixing processing.
Claim 10
Dependent Claim
24 words
An image-forming process as claimed in claim 1, wherein the processing solutions are used at temperatures of about 10° C. to about 50° C.
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) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |