Patent US4876174A successfully refreshed from Google Patents.
US4876174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing silver halide color photosensitive material using developer comprising dialkyl hydroxylamine and no benzyl alcohol
Assignee: Fujifilm Holdings Corp
•
Filing: 1987-06-18
•
Granted: 1989-10-24
•
Expires: 2007-06-18
Abstract
Abstract The present invention relates to a method of processing a silver halide color photosensitive material. In particular, to a rapid processing method capable of reducing the development time. In the processing method, an exposed silver halide color photosensitive material having at least one emulsion layer containing a silver halide having a chlorine content of at least 80 molar % based on the total halogens is processed with a color developer containing an aromatic primary amine color developing agent and a dialkylhydroxylamine of the following general formula (I) but substantially free of benzyl alcohol: ##STR1## wherein R 1 and R 2 each represent an unsubstituted or substituted alkyl group or an unsubstituted or substituted alkenyl group or R 1 and R 2 may form a hetero ring together with nitrogen atom.
Inventors
- 👤 Takatoshi Ishikawa
- 👤 Morio Yagihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:05
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
A method of processing a silver halide color photosensitive material comprising, processing an exposed silver halide color photosensitive material having at least one emulsion layer containing a silver halide having a chlorine content of at least 80 molar % based on the total halogens with a color developer which is substantially free of benzyl alcohol, said color developer (i) having a pH of about 9 to about 11, (ii) containing sulfites in an amount ranging from about 0 to about 5 g/l, (iii) containing an aromatic primary amine color developing agent, and (iv) containing a dialkylhydroxylamine of the following general formula (I): ##STR28## wherein R 1 and R 2 each represent an unsubstituted or substituted alkyl group or an unsubstituted or substituted alkenyl group or R 1 and R 2 may form a hetero ring together with nitrogen atom.
Claim 2
Independent Claim
139 words
A method of processing a silver halide color photosensitive material comprising, processing an exposed silver halide color photosensitive material having at least one emulsion layer containing a silver halide having a chlorine content of at least 80 molar % based on the total halogens with a color developer which is substantially free of benzyl alcohol, said color developer (i) having a pH of about 9 to about 11, (ii) containing sulfites in an amount ranging from about 0 to about 5 g/l, (iii) containing an aromatic primary amine color developing agent, and (iv) containing a dialkylhydroxylamine of the following general formula (I): ##STR28## wherein R 1 and R 2 each represent an unsubstituted or substituted alkyl group or an unsubstituted or substituted alkenyl group or R 1 and R 2 may form a hetero ring together with nitrogen atom.
Claim 3
Dependent Claim
21 words
The method as set forth in claim 1, wherein the aromatic primary amine color developing agent is selected from p-phenylenediamine derivatives.
Claim 4
Dependent Claim
34 words
The method as set forth in claim 1, wherein the color developer contains the aromatic primary amine color developing agent in an amount of about 0.1 g to 20 per liter of the developer.
Claim 5
Dependent Claim
25 words
The method as set forth in claim 1, wherein R 1 and R 2 in the formula (I) each has 1 to 5 carbon atoms.
Claim 6
Dependent Claim
18 words
The method as set forth in claim 1, wherein the dialkylhydroxylamine is selected from the group of ##STR29##
Claim 7
Dependent Claim
26 words
The method as set forth in claim 1, wherein the dialkylhydroxylamine is contained in an amount of about 0.05 to about 20 g/l in the developer.
Claim 8
Dependent Claim
17 words
The method as set forth in claim 1, wherein no benzyl alcohol is contained in the developer.
Claim 9
Dependent Claim
32 words
The method as set forth in claim 1, wherein the photosensitive material is developed at a temperature of about 20° to about 50° C. for about 20 seconds to about 5 minutes.
Claim 10
Dependent Claim
31 words
The method as set forth in claim 1, wherein the emulsion layer contains a silver halide having a chlorine content of at least 90 molar % based on the total halogens.
Claim 11
Dependent Claim
110 words
The method as set forth in claim 1, wherein the developer further contains (v) an alkanolamine having the following formula (II): ##STR30## wherein R 3 represents a hydroxyalkyl group having 2 to 6 carbon atoms and R 4 and R 5 each represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, hydroxyalkyl group having 2 to 6 carbon atoms, benzyl group or a group of the formula: ##STR31## in which n is an integer of 1 to 6 and X and Z each represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a hydroxyalkyl group having 2 to 6 carbon atoms.
Claim 12
Dependent Claim
28 words
The method as set forth in claim 10, wherein the alkanolamine is contained in an amount of about 0.01 to about 20 g per liter of the developer.
Claim 13
Dependent Claim
14 words
The method as set forth in claim 1, wherein the developer contains sulfite ion.
Claim 14
Dependent Claim
26 words
The method as set forth in claim 1, wherein the developer contains 1×10 -4 to 5×10 -2 mol of sulfite ion per liter of the developer.
Claim 15
Dependent Claim
26 words
The method as set forth in claim 1, wherein the developer contains 2.5×10 -3 to 2.5×10 -2 mol of sulfite ion per liter of the developer.
Claim 16
Dependent Claim
19 words
The method as set forth in claim 1, wherein the color photographic material contains a nitrogen atom-split-off yellow coupler.
References Cited (Backward Citations)
US3287124A
Cited
US3293034A
Cited
US3287125A
Cited
US3491151A
Cited
US3996054A
Cited
US4289847A
Cited
US4252892A
Cited
US4564591A
Cited
US4482626A
Cited
JPS59160142A
Cited
JPS59160141A
Cited
US4543322A
Cited
JPS59184341A
Cited
US4542091A
Cited
US4590155A
Cited
JPH06143742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |