US3984243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic developer compositions for obtaining high contrast images
Assignee: Fujifilm Holdings Corp
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Filing: 1973-12-21
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Granted: 1976-10-05
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Expires: 1993-12-21
Abstract
Abstract A photographic developer composition for obtaining high contrast images which comprises (1) a dihydroxybenzene developing agent, (2) an alkanolamine and (3) a compound having the following formula (I) ##SPC1## wherein R 1 and R 2 each represents a lower aliphatic hydrocarbon group, wherein R 1 and R 2 may combine to form a ring, n represents 0 or 1, and X.sup.⊖ represents an anion.
Inventors
- 👤 Isao Shimamura
- 👤 Yoo Iijima
- 👤 Katsumi Hayashi
- 👤 Haruhiko Iwano
- 👤 Tadao Shishido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:13
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
152 words
A photographic developer composition for obtaining high contrast images which comprises (1) a p-dihydroxybenzene developing agent, (2) an alkanolamine which has the general formula ##EQU1## wherein R is a hydroxyalkyl group having 1 to 5 carbon atoms and R 3 and R 4 are each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, (3) a compound having the following formula (I) ##SPC5## wherein R 3 and R 4 each represents an alkyl group having from 1 to 5 carbon atoms, and wherein R 1 and R 2 may combine to form a 6-, 7- or 8-membered ring which may form an alkylene group or a vinylene group or which may further contain a benzene nucleus fused thereto, n represents 0 or 1, and X - represents an anion, and (4) sulfite in amounts of not more than 5g/l.
Claim 2
Dependent Claim
152 words
A photographic developer composition for obtaining high contrast images which comprises (1) a p-dihydroxybenzene developing agent, (2) an alkanolamine which has the general formula ##EQU1## wherein R is a hydroxyalkyl group having 1 to 5 carbon atoms and R 3 and R 4 are each a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, (3) a compound having the following formula (I) ##SPC5## wherein R 3 and R 4 each represents an alkyl group having from 1 to 5 carbon atoms, and wherein R 1 and R 2 may combine to form a 6-, 7- or 8-membered ring which may form an alkylene group or a vinylene group or which may further contain a benzene nucleus fused thereto, n represents 0 or 1, and X - represents an anion, and (4) sulfite in amounts of not more than 5g/l.
Claim 3
Dependent Claim
14 words
The photographic developer composition of claim 1, wherein said compound having the formula ##SPC6##
Claim 4
Dependent Claim
17 words
The photographic developer composition of claim 1, wherein said dihydroxybenzene developing agent is a hydroquinone developing agent.
Claim 5
Dependent Claim
22 words
The photographic developer composition of claim 3, wherein said hydroquinone developing agent is hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, toluhydroquinone, methylhydroquinone, 2,3-dichlorohydroquinone or 2,5-dimethylhydroquinone.
Claim 6
Dependent Claim
14 words
The photographic developer composition of claim 4, wherein said hydroquinone developing agent is hydroquinone.
Claim 7
Dependent Claim
17 words
The photographic developer composition of claim 1, wherein said alkanolamine is tertiary alkanolamine or a secondary alkanolamine.
Claim 8
Dependent Claim
16 words
The photographic developer composition of claim 6, wherein said alkanolamine is diethanolamine, diisopropylamine, triethanolamine or triisopropanolamine.
Claim 9
Dependent Claim
89 words
The photographic developer composition of claim 1, wherein said dihydroxybenzene developing agent, said alkanolamine and said compound having the formula (I) are present in said composition so as to provide from 5 to 50 grams per liter of a developer prepared therefrom for said dihydroxybenzene developing agent, 5 to 400 grams per liter of a developer solution prepared therefrom for said alkanolamine and from 1 × 10.sup. -5 to 1 × 10.sup. -2 mols per liter of a developer solution prepared therefrom for said compound having the formula (I).
Claim 10
Dependent Claim
31 words
The photographic developer composition of claim 1, wherein said developer composition contains at least one of a sulfite ion buffer, an alkali metal sulfite salt, an alkali and a pH buffer.
Claim 11
Dependent Claim
25 words
The photographic developer composition of claim 9, wherein said developer composition contains at least 1 of an antioxidant, an antifogging agent, and a water softener.
Claim 12
Dependent Claim
38 words
A method for the development of imagewise exposed high contrast photographic materials having a silver halide layer containing not less than 50 mol% silver chloride comprising developing said photographic materials in the photographic developer composition of claim 1.
Claim 13
Dependent Claim
16 words
The method for development of claim 11, wherein said compound having the formula (I) is ##SPC7##
Claim 14
Dependent Claim
17 words
The method of development of claim 11, wherein said dihydroxybenzene developing agent is a hydroquinone developing agent.
Claim 15
Dependent Claim
22 words
The method of development of claim 13, wherein said hydroquinone developing agent is hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, toluhydroquinone, methylhydroquinone, 2,3-dichlorohydroquinone or 2,5-dimethylhydroquinone.
Claim 16
Dependent Claim
14 words
The method of development of claim 14, wherein said hydroquinone developing agent is hydroquinone.
Claim 17
Dependent Claim
18 words
The method of development of claim 11, wherein said alkanolamine is a tertiary alkanolamine or a secondary alkanolamine.
Claim 18
Dependent Claim
16 words
The method of development of claim 16, wherein said alkanolamine is diethanolamine, diisopropylamine, triethanolamine or triisopropanolamine.
Claim 19
Dependent Claim
90 words
The method of development of claim 11, wherein said dihydroxybenzene developing agent, said alkanolamine and said compound having the formula (I) are present in said composition so as to provide from 5 to 50 grams per liter of a developer solution prepared therefrom for said dihydroxybenzene developing agent, 5 to 400 grams per liter of a developer solution prepared therefrom for said alkanolamine and from 1 × 10.sup. -5 to 1 × 10.sup. -2 mols per liter of a developer solution prepared therefrom for said compound having the formula (I).
Claim 20
Dependent Claim
31 words
The method of development of claim 11, wherein said developer composition contains at least one of a sulfite ion buffer, an alkali metal sulfite salt, an alkali and a pH buffer.
Claim 21
Dependent Claim
25 words
The method of development of claim 19, wherein said developer composition contains at least one of an antioxidant, an antifogging agent, and a water softener.
References Cited (Backward Citations)
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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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |