Patent US4584257A successfully refreshed from Google Patents.
US4584257A
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Photographic elements containing naphthylsulfonylethylthio heterocycle developement inhibitor precursor
Assignee: Fujifilm Holdings Corp
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Filing: 1985-04-18
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Granted: 1986-04-22
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Expires: 2005-04-18
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, is disclosed. The development inhibitor precursor is a compound represented by 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; Q represents a naphthalene skeleton; R 1 , R 2 , and R 3 , which may be the same or different, independently represent a hydrogen atom or a monovalent substituent; and n represents 1 or 2. The photographic element gives improved image quality particularly in the low Dmin area. The element can be processed over a wide range of different processing temperatures and has improved preservability.
Inventors
- 👤 Hisashi Okamura
- 👤 Yoshio Sakakibara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:55
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C8/00; G03C8/02; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158; Y10S430/161
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 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 the following formula (II): ##STR12## wherein Z represents a non-metallic atomic group necessary for completing an unsubstituted phenyltetrazole ring; R 1 , R 2 , and R 3 , which may be the same or different, independently represent a hydrogen atom or a monovalent substituent with proviso that the total carbon atom number included in R 1 , R 2 , and R 3 is at least 4 and the moiety constituted by R 1 , R 2 , R 3 and the naphthalene ring is one for imparting a non-diffusable property to the compound of general formula (II) or the residual portion of the compound formed when the compound is split by development to release a silver halide development inhibitor, before and after the development.
Claim 2
Dependent Claim
153 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 the following formula (II): ##STR12## wherein Z represents a non-metallic atomic group necessary for completing an unsubstituted phenyltetrazole ring; R 1 , R 2 , and R 3 , which may be the same or different, independently represent a hydrogen atom or a monovalent substituent with proviso that the total carbon atom number included in R 1 , R 2 , and R 3 is at least 4 and the moiety constituted by R 1 , R 2 , R 3 and the naphthalene ring is one for imparting a non-diffusable property to the compound of general formula (II) or the residual portion of the compound formed when the compound is split by development to release a silver halide development inhibitor, before and after the development.
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
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 6
Dependent Claim
19 words
A photographic element as claimed in claim 4, wherein the development inhibitor precursor is incorporated in the cover sheet.
Claim 7
Dependent Claim
25 words
A photographic element as claimed in claim 5, wherein the silver halide emulsion layer is an internal latent image-type direct positive silver halide emulsion layer.
Claim 8
Dependent Claim
30 words
A photographic element as claimed in claim 6, wherein the dye image-forming compound associated with the internal latent image-type direct positive silver halide emulsion layer is a dye-releasing redox compound.
Claim 9
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 10
Dependent Claim
32 words
A photographic element as claimed in claim 8, wherein the development inhibitor precursor is present in an amount in the range of 10 -4 to 10 -1 mol per mol of silver.
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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |