US4418140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the development of color photographic light-sensitive material
Assignee: Fujifilm Holdings Corp
•
Filing: 1982-04-08
•
Granted: 1983-11-29
•
Expires: 2002-04-08
Abstract
Abstract A process for the development of color photographic light-sensitive material is described. The process comprises color developing an exposed light-sensitive material in the presence of a compound of the general formula: ##STR1## wherein M is a hydrogen atom, an alkali metal atom, NH 4 or a protective group for the mercapto group which undergoes cleavage by the action of an alkali; R is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms; and R' is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms. This process prevents the formation of color development fog without seriously reducing sensitivity.
Inventors
- 👤 Hiroyuki Mifune
- 👤 Shoji Ishiguro
- 👤 Tadao Shishido
- 👤 Tatsuo Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:44
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/3924; G03C7/39244; G03C7/3926; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A process for developing a color photographic light-sensitive material which comprises exposing a color photographic light-sensitive material and, thereafter, color developing the exposed light-sensitive material in the presence of a compound represented by the general formula (I): ##STR9## wherein M is a hydrogen atom, an alkali metal atom, NH 4 or a protective group for the mercapto group which undergoes cleavage by the action of an alkali; R is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms; and R' is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms in an amount effective to prevent the formation of development fog while minimizing the inhibition of color development and reduction of sensitivity.
Claim 2
Dependent Claim
120 words
A process for developing a color photographic light-sensitive material which comprises exposing a color photographic light-sensitive material and, thereafter, color developing the exposed light-sensitive material in the presence of a compound represented by the general formula (I): ##STR9## wherein M is a hydrogen atom, an alkali metal atom, NH 4 or a protective group for the mercapto group which undergoes cleavage by the action of an alkali; R is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms; and R' is a hydrogen atom or an alkyl group containing 1 to 3 carbon atoms in an amount effective to prevent the formation of development fog while minimizing the inhibition of color development and reduction of sensitivity.
Claim 3
Dependent Claim
18 words
A process for developing a color photographic light-sensitive material as claimed in claim 1, wherein R is hydrogen.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1, wherein the compound of general formula (I) is contained within the light-sensitive material in an amount of 10 -7 to 10 -2 mol/Ag mol.
Claim 5
Dependent Claim
38 words
A process for developing a color photographic light-sensitive material as claimed in claim 3, wherein the compound of general formula (I) is contained in the light-sensitive material in an amount of 10 -6 to 10 -2 mol/Ag mol.
Claim 6
Dependent Claim
37 words
A process for developing a color photographic light-sensitive material as claimed in claim 1, wherein the compound of general formula (I) is contained in the color developer in an amount of 10 -6 to 10 -1 mol/l.
Claim 7
Dependent Claim
38 words
A process for developing a color photographic light-sensitive material as claimed in claim 5, wherein the compound of general formula (I) is contained in the color developer in an amount of from 10 -5 to 3×10 -2 mol/l.
Claim 8
Dependent Claim
30 words
A process for developing a color photographic light-sensitive material as claimed in claim 1, wherein said process is carried out at a temperature of from 18° C. to 50° C.
Claim 9
Dependent Claim
29 words
A process for developing a color photographic light-sensitive material as claimed in claim 7, wherein said process is carried out over a period of 10 seconds to 12 minutes.
Claim 10
Dependent Claim
20 words
A process according to claim 1, wherein the color photographic light-sensitive material contains a vinyl sulfone-based compound as a hardener.
Claim 11
Dependent Claim
20 words
A process according to claim 1, wherein a time for the color developing is lengthened than a normal developing time.
Claim 12
Dependent Claim
12 words
A process according to claim 1 wherein R is a hydrogen atom.
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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |