Patent US4940654A successfully refreshed from Google Patents.
US4940654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid particle dispersion filter dyes for photographic compositions
Assignee: Eastman Kodak Co
•
Filing: 1989-06-30
•
Granted: 1990-07-10
•
Expires: 2009-06-30
Abstract
Abstract Solid particle dispersions of dyes of the formula: [D-(A).sub.y ]-X.sub.n where D that comprises an aromatic ring if y is O, A is an aromatic ring bonded directly or indirectly to D, X is a substituent, other than carboxy, having an ionizable proton, either on A or on an aromatic ring portion of D, having a pKa of about 4 to 11 in a 50/50 mixture (volume basis) of ethanol and water, y is 0 to 4, n is 1 to 7, and the compound has a log partition coefficient of from about 0 to 6 when the compound is in unionized form, are disclosed for filter dye layers of photographic elements. They may be coated in layers of photographic elements without a mordant, and they do not wander at coating pH's. At processing pH's, however, they are solubilized for easy removal and/or decolorization.
Inventors
- 👤 Donald R. Diehl
- 👤 Ronda E. Factor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:06
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/0091; C09B23/02; C09B23/14; C09B23/143; C09B29/00; C09B29/0003; C09B29/24; C09B29/28; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
169 words
A photographic element comprising a support having thereon a radiation-sensitive silver halide emulsion layer and a hydrophilic filter dye layer comprising a hydrophilic binder and an amount effective as a photographic filter dye of a dispersion of solid particles having a mean diameter of from about 0.01 to 10 mm, said particles consisting essentially of a filter dye having the formula: [D-(A).sub.y ]-X.sub.n where D is a chromophoric light-absorbing moiety, which, when y is 0, comprises an aromatic ring free of carboxy substituents, A is an aromatic ring, free of carboxy substituents, bonded directly or indirectly to D, X is a substituent, other than carboxy, having an ionizable proton, either on A or on an aromatic ring portion of D, having a pKa of about 4 to 11 in a 50/50 mixture (volume basis) of ethanol and water, y is 0 to 4, n is 1 to 7, and the compound has a log partition coefficient of from about 0 to 6 when the compound is in unionized form.
Claim 2
Dependent Claim
169 words
A photographic element comprising a support having thereon a radiation-sensitive silver halide emulsion layer and a hydrophilic filter dye layer comprising a hydrophilic binder and an amount effective as a photographic filter dye of a dispersion of solid particles having a mean diameter of from about 0.01 to 10 mm, said particles consisting essentially of a filter dye having the formula: [D-(A).sub.y ]-X.sub.n where D is a chromophoric light-absorbing moiety, which, when y is 0, comprises an aromatic ring free of carboxy substituents, A is an aromatic ring, free of carboxy substituents, bonded directly or indirectly to D, X is a substituent, other than carboxy, having an ionizable proton, either on A or on an aromatic ring portion of D, having a pKa of about 4 to 11 in a 50/50 mixture (volume basis) of ethanol and water, y is 0 to 4, n is 1 to 7, and the compound has a log partition coefficient of from about 0 to 6 when the compound is in unionized form.
Claim 3
Dependent Claim
50 words
A photographic element according to claim 1 wherein X and the aromatic ring to which it is attached are selected from the group consisting of sulfonamidophenyl, ##STR46## where R' is acyl, phenyl, or vinyl, R" is --CO--PH or SO 2 R, R is alkyl or aryl, and Ph is phenyl.
Claim 4
Dependent Claim
24 words
A photographic element according to claim 1 wherein the particles in said dispersion have a mean diameter of from about 0.01 to 1 μm.
Claim 5
Dependent Claim
15 words
A photographic element according to claim 1 wherein said hydrophilic binder is a hydrophilic colloid.
Claim 6
Dependent Claim
13 words
A photographic element according to claim 1 wherein said hydrophilic binder is gelatin.
Claim 7
Dependent Claim
20 words
A photographic element according to claim 1 wherein said filter dye layer is the same as the silver halide layer.
Claim 8
Dependent Claim
19 words
A photographic element according to claim 1 wherein said filter dye layer is different than said silver halide layer.
Claim 9
Dependent Claim
25 words
A photographic element according to claim 7 wherein said filter dye layer is on the same side of the support as said silver halide layer.
Claim 10
Dependent Claim
20 words
A photographic element according to any of claims 1-8 wherein X has a pKa of from about 7 to 11.
Claim 11
Dependent Claim
13 words
A photographic element according to any of claims 1-8 wherein X is sulfonamido.
References Cited (Backward Citations)
GB500795A
Cited
US2527583A
Cited
US2538009A
Cited
US3282699A
Cited
US3406069A
Cited
US3746539A
Cited
US3795519A
Cited
GB1414456A
Cited
US3932188A
Cited
US4092168A
Cited
US4110115A
Cited
US4203716A
Cited
US4309500A
Cited
US4294917A
Cited
US4294916A
Cited
US4440852A
Cited
US4420555A
Cited
US4500631A
Cited
JPS59113434A
Cited
EP0141298A1
Cited
US4542091A
Cited
US4716099A
Cited
US4764455A
Cited
US4756993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |