US3793027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing composition for use with photographic materials for the graphic arts
Assignee: Fujifilm Holdings Corp
•
Filing: 1972-03-22
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Granted: 1974-02-19
•
Expires: 1992-03-22
Abstract
Abstract The developing composition of the invention has a good storage stability. A developing composition for use in photographic materials for printing, containing an infectious developing agent, sulfite and a hydrazine compound of the general formula:
Inventors
- 👤 E Okutsu
- 👤 Y Iijima
- 👤 H Iwano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
13 words
The developing composition of claim 1, wherein said composition contains formaldehyde-sodium bisulfite adduct.
Claim 2
Dependent Claim
22 words
The developing composition of claim 1, wherein said dihydroxy benzene-type developing agent is hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, toluhydroquinone, methylhydroquinone, 2,3-dichlorohydroquinone, or 2,5-dimethylhydroquinone.
Claim 3
Dependent Claim
14 words
The developing composition of claim 3, wherein said dihydroxy benzene-type developing agent is hydroquinone.
Claim 4
Dependent Claim
28 words
The developing composition of claim 1, wherein said dihydroxy benzene-type developing agent is present at a level ranging from 5 to 50 g per liter of developing solution.
Claim 5
Dependent Claim
37 words
The developing composition of claim 1, wherein R1 is a methyl group, an ethyl group or a CONH2 group, wherein R2 and R3 is a hydrogen atom or methyl group, and wherein R4 is a hydrogen atom.
Claim 6
Independent Claim
75 words
A method for forming photographic images for the graphic arts comprising exposing a high contract photographic element having a silver chloride content of not less than 50 mol percent and developing said exposed element in a developer composition comprising a dihydroxy benzene-type developing agent, a member selected from the group consisting of an aldehyde-alkali metal bisulfite adduct, a ketone-alkali metal bisulfite adduct, and a combination thereof and at least one hydrazine compound having the formula
Claim 7
Dependent Claim
12 words
The method of claim 7, wherein said composition contains formaldehyde-sodium bisulfite adduct.
Claim 8
Dependent Claim
22 words
The method of claim 7, wherein said dihydroxy benzene-type developing agent is hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquionone, toluhydroquinone, methylhydroquinone, 2, 3-dichlorohydroquinone, or 2,5-dimethylhydroquinone.
Claim 9
Dependent Claim
13 words
The method of claim 9, wherein said dihydroxy benzene-type developing agent is hydroquinone.
Claim 10
Dependent Claim
27 words
The method of claim 7, wherein said dihydroxy benzene-type developing agent is present at a level ranging from 5 to 50 g per liter of developing solution.
Claim 11
Dependent Claim
36 words
The method of claim 7, wherein R1 is a methyl group, an ethyl group or a CONH2 group, wherein R2 and R3 is a hydrogen atom or methyl group, and wherein R4 is a hydrogen atom.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |