Patent US4126472A successfully refreshed from Google Patents.
US4126472A
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Process of making a lithographic photosensitive silver halide emulsion having reduced susceptibility to pressure containing an iridium compound, a hydroxytetrazaindene and a polyoxyethylene
Assignee: Fujifilm Holdings Corp
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Filing: 1977-02-18
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Granted: 1978-11-21
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Expires: 1997-02-18
Abstract
Abstract A method of producing a lithographic photosensitive material comprising adding a water soluble iridium compound to the photographic emulsion in a ratio of about 10-6 to 10-4 mole per mole of the silver halide at the first or second ripening procedure of a silver halide photographic emulsion containing at least 60 mole% silver chloride, further adding a hydroxytetrazaindene compound and a polyoxyethylene compound to the photographic emulsion and coating the photographic emulsion on a support.
Inventors
- 👤 Takeo Sakai
- 👤 Tadashi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G03C1/04; G03C1/043; G03C1/34; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A method of producing a lithographic photosensitive material having a high gamma value and reduced susceptibility to the effects of pressure for reproducing line and half-tone dot images comprising adding a water soluble ir idium compound to a silver halide photographic emulsion containing at least 60 mole % silver chloride in a ratio of about 10 -6 to 10 -4 mole of said iridium compound per mole of the silver halide in said silver halide photographic emulsion at the first or second ripening procedure of said silver halide photographic emulsion; further adding a hydroxytetrazaindene compound and a polyoxyethylene compound to said photographic emulsion; and coating the photographic emulsion on a support.
Claim 2
Independent Claim
111 words
A method of producing a lithographic photosensitive material having a high gamma value and reduced susceptibility to the effects of pressure for reproducing line and half-tone dot images comprising adding a water soluble ir idium compound to a silver halide photographic emulsion containing at least 60 mole % silver chloride in a ratio of about 10 -6 to 10 -4 mole of said iridium compound per mole of the silver halide in said silver halide photographic emulsion at the first or second ripening procedure of said silver halide photographic emulsion; further adding a hydroxytetrazaindene compound and a polyoxyethylene compound to said photographic emulsion; and coating the photographic emulsion on a support.
Claim 3
Dependent Claim
24 words
The method of claim 1, wherein said water soluble iridium compound is a water soluble iridium salt or a water soluble iridium complex salt.
Claim 4
Dependent Claim
109 words
The method of claim 1, wherein said water soluble iridium compound is IrCl 3 , IrBr 3 , IrI 3 , IrBr 4 , K 3 IrCl 6 , Li 3 IrCl 6 , (NH 4 ) 3 IrCl 6 , K 3 IrBr 6 , Na 3 IrBr 6 , K 2 IrCl 6 , Na 2 IrCl 6 , Li 2 IrCl 6 , (NH 4 ) 2 IrCl 6 , Na 2 IrBr 6 , Ir(NH 3 ) 6 (OH) 3 , Ir(NH 3 ) 6 (NO 3 ) 3 , Ir(NH 3 ) 6 Cl 3 , or Ir(NH 3 ) 6 Br 3 .
Claim 5
Dependent Claim
39 words
The method of claim 1, wherein said hydroxytetrazaindene compound has the general formula (I). ##STR7## wherein R 1 and R 2 each represents a hydrogen atom, an alkyl group, or an aryl group; and n is 1 or 2.
Claim 6
Dependent Claim
52 words
The method of claim 4, wherein said alkyl group is an unsubstituted alkyl group or an alkyl group substituted with a hydroxyl group or a carboxyl group and wherein said aryl group is a phenyl group or a phenyl group substituted with an alkyl group, a halogen atom, or a hydroxyl group.
Claim 7
Dependent Claim
21 words
The method of claim 4, wherein said hydroxytetrazaindene compound is 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene, 4-hydroxy-1,3,3a,7-tetrazaindene, 4-hydroxy-6-phenyl1,3,3a,7-tetrazaindene, 4-methyl-6-hydroxyl-1,3,3a,7-tetrazaindene, 4-hydroxy-6-benzyl-1,3,3a,7-tetrazaindene, 2-methyl-4-hydroxy-6-butyl-1,3,3a,7-tetrazaindene, 4-hydroxy-6-carboxymethyl-1,3,3a,7-tetrazaindene, 2-hydroxymethyl-4-hydroxy-6-phenyl-1,3,3a,7-tetrazaindene, 2-(4-chloro-2-methylphenoxymethyl)-4-hydroxy-1,3,3a,7-tetrazaindene or 2-methyl-4-hydroxy-6-ethoxycarbonylmethyl-1,3,3a,7-tetrazaindene.
Claim 8
Dependent Claim
19 words
The method of claim 1, wherein said polyoxyethylene compound is a polyoxyethylene compound having 5 or more ethyleneoxy groups.
Claim 9
Dependent Claim
19 words
The method of claim 7, wherein said polyoxyethylene compound has a molecular weight ranging from about 300 to 50,000.
Claim 10
Dependent Claim
50 words
The method of claim 7, wherein said polyoxyethylene compound is a condensation product of ethylene oxide with an aliphatic alcohol, a glycol, a carboxylic acid, an aliphatic amine, a phenolic compound or a dehydrated cyclic compound derived from a hexitol derivative, or is a block polymer of polyoxyethylene and polyoxypropylene.
Claim 11
Dependent Claim
49 words
The method of claim 1, wherein said hydroxytetrazaindene compound is added in an amount ranging from about 10 -4 to 10 -2 moles per mole of silver halide and said polyoxyethylene compound is added in an amount of from about 0.01 to 1 g per mole of silver halide.
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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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |