US4330616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for processing silver halide color photographic material
Assignee: Konica Minolta Inc
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Filing: 1981-07-23
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Granted: 1982-05-18
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Expires: 2001-07-23
Abstract
Abstract A process of developing a color photographic material with a color developer, a diphosphonic acid and a water soluble metallic salt of magnesium, aluminum, zinc, barium or zirconium.
Inventors
- 👤 Masayuki Kurematsu
- 👤 Shigeharu Koboshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:03
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A method for processing a silver halide color photographic material which comprises processing said color photographic material in the presence of (a) an aromatic primary amine color developing agent, (b) a diphosphonic acid, and (c) a water soluble metallic salt of magnesium, aluminium, zinc, barium or zirconium in a stoichiometrically equivalent or excess amount with respect to that of diphosphonic acid.
Claim 2
Independent Claim
61 words
A method for processing a silver halide color photographic material which comprises processing said color photographic material in the presence of (a) an aromatic primary amine color developing agent, (b) a diphosphonic acid, and (c) a water soluble metallic salt of magnesium, aluminium, zinc, barium or zirconium in a stoichiometrically equivalent or excess amount with respect to that of diphosphonic acid.
Claim 3
Dependent Claim
19 words
A method according to claim 1, wherein the water soluble metallic salt is water soluble metallic salt of magnesium.
Claim 4
Independent Claim
69 words
A method for processing a silver halide color photographic material which comprises processing said color photographic material in the presence of (a) an aromatic primary amine color developing agent, (b) a diphosphonic acid, (c) a water soluble metallic salt of magnesium, aluminium, zinc, barium or zirconium in a stoichiometrically equivalent or excess amount with respect to that of diphosphonic acid, and (d) an iminodicarbonic acid or a polyphosphoric acid.
Claim 5
Independent Claim
69 words
A method for processing a silver halide color photographic material which comprises processing said color photographic material in the presence of (a) an aromatic primary amine color developing agent, (b) a diphosphonic acid, (c) a water soluble metallic salt of magnesium, aluminium, zinc, barium or zirconium in a stoichiometrically equivalent or excess amount with respect to that of diphosphonic acid, and (d) an iminodicarbonic acid or a polyphosphoric acid.
Claim 6
Dependent Claim
55 words
An aqueous color developing solution which comprises (a) an aromatic primary amine color developing agent, (b) a diphosphonic acid, (c) a water soluble metallic salt of magnesium, aluminium, zinc, barium or zirconium in an amount stoichiometrically equivalent or excess with respect to that of diphosphonic acid, and (d) an iminodicarbonic acid or a polyphosphoric acid.
Claim 7
Dependent Claim
55 words
An aqueous color developing solution which comprises (a) an aromatic primary amine color developing agent, (b) a diphosphonic acid, (c) a water soluble metallic salt of magnesium, aluminium, zinc, barium or zirconium in an amount stoichiometrically equivalent or excess with respect to that of diphosphonic acid, and (d) an iminodicarbonic acid or a polyphosphoric acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |