US4055426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stabilizing a color developing solution
Assignee: Fujifilm Holdings Corp
•
Filing: 1976-08-27
•
Granted: 1977-10-25
•
Expires: 1996-08-27
Abstract
Abstract A process for stabilizing a color developing solution which comprises adding one or more hydroxamic acid compounds represented by the following formula to the color developing solution: ##STR1## wherein X represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an unsubstituted or substituted aryl group having 6 to 10 carbon atoms, an amino group, an alkylamino group having 1 to 4 carbon atoms or an arylamino group.
Inventors
- 👤 Junkichi Ogawa
- 👤 Tsumoru Ishii
- 👤 Isao Shimamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:33
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
76 words
A process for stabilizing a color developing solution containing one or more p-phenylenediamine derivatives which comprises adding one or more hydroxamic acid compounds represented by the following formula to the color developing solution: ##STR3##wherein X represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an unsubstituted or substituted aryl group having 6 to 10 carbon atoms, an amino group, an alkylamino group having 1 to 4 carbon atoms or an arylamino group.
Claim 2
Dependent Claim
76 words
A process for stabilizing a color developing solution containing one or more p-phenylenediamine derivatives which comprises adding one or more hydroxamic acid compounds represented by the following formula to the color developing solution: ##STR3##wherein X represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an unsubstituted or substituted aryl group having 6 to 10 carbon atoms, an amino group, an alkylamino group having 1 to 4 carbon atoms or an arylamino group.
Claim 3
Dependent Claim
31 words
The process of claim 1, wherein said one or more hydroxamic acids are added in an amount of from about 0.001 to about 20 g per liter of the developing solution.
Claim 4
Dependent Claim
29 words
The process of claim 1, wherein said one or more hydroxamic acids are added in an amount of from 0.01 to 10 g per liter of the developing solution.
Claim 5
Dependent Claim
19 words
The process of claim 3, wherein said developing solution is at a pH of from about 7 to 14.
Claim 6
Dependent Claim
95 words
In a process for developing an imagewise exposed color photographic material by bringing said material into contact with a color developing solution containing one or more p-phenylenediamine derivatives as a color developing agent, the improvement wherein said color developing solution comprises one or more hydroxamic acid compounds represented by the following formula: ##STR4##wherein X represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an unsubstituted or substitured aryl group having 6 to 10 carbon atoms, an amino group, an alkylamino group having 1 to 4 carbon atoms or an arylamino group.
Claim 7
Dependent Claim
95 words
In a process for developing an imagewise exposed color photographic material by bringing said material into contact with a color developing solution containing one or more p-phenylenediamine derivatives as a color developing agent, the improvement wherein said color developing solution comprises one or more hydroxamic acid compounds represented by the following formula: ##STR4##wherein X represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an unsubstituted or substitured aryl group having 6 to 10 carbon atoms, an amino group, an alkylamino group having 1 to 4 carbon atoms or an arylamino group.
Claim 8
Dependent Claim
30 words
The process of claim 5, wherein said one or more hydroxamic acids are present in said solution in an amount of from about 0.001 to about 20 grams per liter.
Claim 9
Dependent Claim
28 words
The process of claim 5, wherein said one or more hydorxamic acids are present in said solution in an amount of from 0.01 to 10 grams per liter.
Claim 10
Dependent Claim
19 words
The process of claim 7 wherein said developing solution is at a pH of from about 7 to 14.
Claim 11
Dependent Claim
23 words
The process of claim 1, wherein X is selected from the group consisting of phenyl, alkylphenyl, alkoxyphenyl, hydroxyphenyl, anilino, toluidino, anisidino or xylydino.
Claim 12
Dependent Claim
23 words
The process of claim 5, wherein X is selected from the group consisting of phenyl, alkylphenyl, alkoxyphenyl, hydroxyphenyl, anilino, toluidino, anisidino or xylydino.
Claim 13
Dependent Claim
32 words
The process of claim 1, wherein X is a substituted phenyl group and the substituent is selected from the group consisting of alkyl, alkoxy, acyl, carboxyl, sulfo, halogen, hydroxyl, amino or nitro.
Claim 14
Dependent Claim
32 words
The process of claim 5, wherein X is a substituted phenyl group and is the substituent selected from the group consisting of alkyl, alkoxy, acyl, carboxyl, sulfo, halogen, hydroxyl, amino or nitro.
Claim 15
Dependent Claim
32 words
The process of claim 1, wherein X is a substituted phenyl group and the substituent is selected from the group consisting of cyano, formyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, sulfoalkyl, halogenated alkyl or nitroalkyl.
Claim 16
Dependent Claim
31 words
The process of claim 5, wherein X is substituted phenyl group and the substituent is selected from the group consisting of cyano, formyl, hydroxyalkyl, aminoalkyl, carboxyalkyl, sulfoalkyl, halogenated alkyl or nitroalkyl.
Claim 17
Dependent Claim
25 words
The process of claim 1, wherein X is a substituted phenyl group and the substituent is selected from the group consisting of cyanoalkyl or formylalkyl.
Claim 18
Dependent Claim
25 words
The process of claim 5, wherein X is a substituted phenyl group and the substituent is selected from the group consisting of cyanoalkyl or formylalkyl.
Claim 19
Dependent Claim
40 words
The process of claim 1, wherein X is selected from the group consisting of --H, --CH 3 , --C 6 H 5 , ortho --C 6 H 4 OH, --NH 2 , --NHCH 3 or --NHC 6 H 5 .
Claim 20
Dependent Claim
40 words
The process of claim 5, wherein X is selected from the group consisting of --H, --CH 3 , --C 6 H 5 , ortho --C 6 H 4 OH, --NH 2 , --NHCH 3 or --NHC 6 H 5 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |