US4511644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements with development inhibitor precursor
Assignee: Fujifilm Holdings Corp
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Filing: 1983-12-09
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Granted: 1985-04-16
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Expires: 2003-12-09
Abstract
Abstract A photographic element comprised of a support having provided thereon at least one silver halide emulsion layer, the element containing a development inhibitor precursor. The development inhibitor precursor is represented by the following general formula (I): ##STR1## wherein A represents an unsubstituted or substituted phenyl group or a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R 1 represents a hydrogen atom or a monovalent substituent; and R 2 represents an organic ballasting group. The element is capable of providing color images having improved image quality particularly with respect to having a low density in the Dmin areas. The photographic element can be processed over a wide range of processing temperatures. Further, the element can be preserved for long periods of time without having a reduction in the density in the Dmax areas.
Inventors
- 👤 Hisashi Okamura
- 👤 Shinji Sakaguchi
- 👤 Osamu Takahashi
- 👤 Ashita Murai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:46
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C8/00; G03C8/02; G03C8/08; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158; Y10S430/161
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
67 words
A photographic element comprising a support having provided thereon at least one photosensitive silver halide emulsion layer, said photographic element containing a development inhibitor precursor represented by following general formula (I): ##STR11## wherein A represents an unsubstituted or substituted phenyl group or a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R 1 represents a hydrogen atom or a monovalent substituent; and R 2 represents an organic ballasting group.
Claim 2
Dependent Claim
67 words
A photographic element comprising a support having provided thereon at least one photosensitive silver halide emulsion layer, said photographic element containing a development inhibitor precursor represented by following general formula (I): ##STR11## wherein A represents an unsubstituted or substituted phenyl group or a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R 1 represents a hydrogen atom or a monovalent substituent; and R 2 represents an organic ballasting group.
Claim 3
Dependent Claim
18 words
A photographic element as claimed in claim 1, wherein the element is a color diffusion transfer photographic element.
Claim 4
Dependent Claim
58 words
A photographic element as claimed in claim 2, further comprising: a dye image-forming compound associated with the emulsion layer; an image-receiving element for fixing a diffusible dye formed from the dye image-forming compound to form an image; an alkaline processing composition capable of developing the exposed photosensitive element; and a neutralizing means for neutralizing the alkaline processing composition.
Claim 5
Dependent Claim
14 words
A photosensitive element as claimed in claim 1, wherein A is a tetrazole ring.
Claim 6
Dependent Claim
14 words
A photographic element as claimed in claim 4, wherein A is a phenyltetrazole ring.
Claim 7
Dependent Claim
94 words
A photographic element as claimed in claim 2, wherein the color diffusion transfer photographic element comprises: a photosensitive sheet comprising a transparent support having provided thereon an image-receiving element for fixing a diffusible dye to form an image, a white reflecting layer, a light-shielding layer, and a photosensitive element including at least one silver halide emulsion layer and a dye image-forming compound associated therewith; an alkaline processing composition capable of developing the exposed photosensitive element; and a cover sheet comprising another support having provided thereon a neutralizing means for neutralizing the alkaline processing composition.
Claim 8
Dependent Claim
15 words
A photographic element as claimed in claim 1, wherein A is a substituted tetrazole ring.
Claim 9
Dependent Claim
25 words
A photographic element as claimed in claim 1, wherein the silver halide emulsion layer is in internal latent image-type direct positive silver halide emulsion layer.
Claim 10
Dependent Claim
29 words
A photographic element as claimed in claim 8, wherein the dye image-forming compound associated with the internal latent image-type direct positive silver halide emulsion layer is dye-releasing redox compound.
Claim 11
Dependent Claim
53 words
A photographic element as claimed in claim 1, wherein the development inhibitor precursor is a compound represented by following general formula (II): ##STR12## wherein Z represents a non-metallic atomic group necessary for completing a 5-membered or 6-membered heterocyclic ring, and R 1 and R 2 are the same as defined in claim 1.
Claim 12
Dependent Claim
28 words
A photographic element as claimed in claim 1, wherein the development inhibitor precursor is present in an amount of at least 10 -5 mol per mol of silver.
Claim 13
Dependent Claim
32 words
A photographic element as claimed in claim 11, wherein the development inhibitor precursor is present in an amount in the range of 10 -4 to 10 -1 mol per mol of silver.
Claim 14
Dependent Claim
14 words
A photographic element as claimed in claim 1, wherein A includes the moiety: ##STR13##
Claim 15
Dependent Claim
24 words
A photographic element as claimed in claim 13, wherein said moiety is substituted with a phenyl group, which phenyl group may also be substituted.
Claim 16
Dependent Claim
26 words
A photographic element as claimed in claim 14 wherein the organic ballasting group is a substituted or unsubstituted alkyl group having 8 to 32 carbon atoms.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |