US3772022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing composition for use with photographic materials for the graphic arts
Assignee: Fujifilm Holdings Corp
•
Filing: 1972-03-31
•
Granted: 1973-11-13
•
Expires: 1992-03-31
Abstract
Abstract A developing agent for use in photographic materials for the graphic arts, containing an infectious developing agent and acetonitrile, malonitrile or derivatives thereof is disclosed. These nitrile compounds have improved storage stability and prevent air-oxidation.
Inventors
- 👤 E Okutsu
- 👤 Y Iijima
- 👤 H Iwano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:30
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
25 words
The developing composition of claim 1, wherein said composition additionally contains an aldehyde-alkali metal bisulfite adduct, a ketone-alkali metal bisulfite adduct or a combination thereof.
Claim 2
Dependent Claim
13 words
The developing composition of claim 2, wherein said composition contains formaldehyde-sodium bisulfite adduct.
Claim 3
Dependent Claim
23 words
The developing composition of claim 1, wherein said dihydroxy developing agent is hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, toluhydroquinone, methylhydroquinone, 2, 3-dichlorohydroquinone, or 2, 5-dimethylhydroquinone.
Claim 4
Dependent Claim
13 words
The developing composition of claim 4, wherein said dihydroxy-benzene developing agent is hydroquinone.
Claim 5
Dependent Claim
48 words
The developing composition of claim 1, wherein said compound is present at a level of from 0.1 g to 40 g per liter of developing solution and wherein said dihydroxy developing agent is present at a level ranging from 5 to 50 g per liter of developing solution.
Claim 6
Dependent Claim
27 words
The developing composition of claim 1, wherein R1 is a hydrogen atom, a carboxyl group, or a cyano group, and wherein R2 and R3 are hydrogen atoms.
Claim 7
Independent Claim
58 words
A method for forming photographic images for the graphic arts which comprises exposing imagewise a high contrast photographic element having a silver chloride content not less than 50%, and developing said exposed element in a developer composition comprising a dihydroxybenzene developing agent, sulfite ion in an amount up to 5g/liter and at least one compound having the formula:
Claim 8
Dependent Claim
24 words
The method of claim 8, wherein said composition additionally contains an aldehyde-alkali metal bisulfite adduct, a ketone-alkali metal bisulfite adduct or a combination thereof.
Claim 9
Dependent Claim
12 words
The method of claim 9, wherein said composition contains formaldehyde-sodium bisulfite adduct.
Claim 10
Dependent Claim
22 words
The method of claim 8, wherein said dihydroxy developing agent is hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, toluhydroquinone, methylhydroquinone, 2, 3-dichlorohydroquinone, or 2, 5-dimethylhydroquinone.
Claim 11
Dependent Claim
12 words
The method of claim 11, wherein said dihydroxy-benzene developing agent is hydroquinone.
Claim 12
Dependent Claim
47 words
The method of claim 8, wherein said compound is present at a level of from 0.1 g to 40 g per liter of developing solution and wherein said dihydroxy developing agent is present at a level ranging from 5 to 50 g per liter of developing solution.
Claim 13
Dependent Claim
26 words
The method of claim 8, wherein R1 is a hydrogen atom, a carboxyl group, or a cyano group, and wherein R2 and R3 are hydrogen atoms.
References Cited (Backward Citations)
US3543291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |