Patent US5254441A successfully refreshed from Google Patents.
US5254441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development inhibitor reflector layers
Assignee: Eastman Kodak Co
•
Filing: 1991-10-01
•
Granted: 1993-10-19
•
Expires: 2011-10-01
Abstract
Abstract This invention provides a photographic element containing a polymer layer which reflects a development inhibitor or its precursor released from a DIR compound thereby retarding the diffusion of the development inhibitor to another layer. The polymers used in the barrier layer contain from about 1×10 -5 to about 4×10 -3 ion forming functional groups. The preferred polymers comprise repeating units of the formula --(A) m -(B) n -- with A derived from a hydrophobic monomer and B derived from an ionic hydrophilic monomer with the more preferred monomers being acrylates, methacrylates, acrylamides and methacrylamides. The invention also provides a method of processing a photographic element containing such a barrier layer.
Inventors
- 👤 Glenn T. Pearce
- 👤 Elizabeth V. Patton
- 👤 Michael R. Roberts
- 👤 Ignazio S. Ponticello
- 👤 George Villard
- 👤 Susan C. Gross, deceased
- 👤 executrix Marjorie M. Datskow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:51
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C7/392; G03C7/396; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
146 words
A photographic element comprising at least one silver halide emulsion layer in reactive association with a DIR compound and at least one barrier layer located between said silver halide emulsion layer and a second silver halide emulsion layer or between said silver halide layer and a solution for processing; said silver halide emulsion layer comprising a polymer comprised of repeating units of the formula --(A)-- and --(B)-- wherein A is derived from a hydrophobic ethylenically unsaturated monomer and B is derived from a hydrophillic ethylenically unsaturated monomer; wherein the polymer contains from about 1×10 -5 to about 4×10 -3 moles/gram of ion forming functional groups which are or form anionic acid salts or acid addition salts of primary amino groups such that the polymer layer reflects development inhibitor released from the DIR compound and allows the passage of solutions for processing the silver halide emulsion layer.
Claim 2
Dependent Claim
146 words
A photographic element comprising at least one silver halide emulsion layer in reactive association with a DIR compound and at least one barrier layer located between said silver halide emulsion layer and a second silver halide emulsion layer or between said silver halide layer and a solution for processing; said silver halide emulsion layer comprising a polymer comprised of repeating units of the formula --(A)-- and --(B)-- wherein A is derived from a hydrophobic ethylenically unsaturated monomer and B is derived from a hydrophillic ethylenically unsaturated monomer; wherein the polymer contains from about 1×10 -5 to about 4×10 -3 moles/gram of ion forming functional groups which are or form anionic acid salts or acid addition salts of primary amino groups such that the polymer layer reflects development inhibitor released from the DIR compound and allows the passage of solutions for processing the silver halide emulsion layer.
Claim 3
Dependent Claim
146 words
A photographic element comprising at least one layer comprising a silver halide emulsion in reactive association with a DIR compound and at least one barrier layer located between said silver halide emulsion layer and a second silver halide emulsion layer or between said silver halide layer and a solution for processing said silver halide emulsion layer comprising a polymer comprised of repeating units derived from a hydrophobic acrylate, methacrylate, acrylamide or methacrylamide monomer and repeating units derived from an ionic hydrophilic acrylate, methacrylate, acrylamide or methacrylamide monomer wherein the polymer contains from about 1×10 -5 to about 4×10 -3 moles/gram of ion forming functional groups which are or from anionic acid salts or acid addition salts of primary amino groups such that the polymer layer reflects development inhibitor released from the DIR compound and allows the passage of solutions for processing the silver halide emulsion layer.
Claim 4
Dependent Claim
146 words
A photographic element comprising at least one layer comprising a silver halide emulsion in reactive association with a DIR compound and at least one barrier layer located between said silver halide emulsion layer and a second silver halide emulsion layer or between said silver halide layer and a solution for processing said silver halide emulsion layer comprising a polymer comprised of repeating units derived from a hydrophobic acrylate, methacrylate, acrylamide or methacrylamide monomer and repeating units derived from an ionic hydrophilic acrylate, methacrylate, acrylamide or methacrylamide monomer wherein the polymer contains from about 1×10 -5 to about 4×10 -3 moles/gram of ion forming functional groups which are or from anionic acid salts or acid addition salts of primary amino groups such that the polymer layer reflects development inhibitor released from the DIR compound and allows the passage of solutions for processing the silver halide emulsion layer.
Claim 5
Dependent Claim
23 words
The photographic element of claim 2 wherein the polymer is further comprised of repeating units derived from a non-ionic hydrophilic ethylenically unsaturated monomer.
Claim 6
Dependent Claim
261 words
The photographic element of claim 2, wherein the polymer comprises repeating units of the formula --(A).sub.m --(B).sub.n -- wherein A is a repeating unit derived from a hydrophobic monomer the unit having the structure ##STR8## where R 1 =--H or --CH 3 ; m is 0 to 99.5 mole %; E=--OR 2 or --NR 3 R 4 ; R 2 =a substituted or unsubstituted straight, branched, or cyclic alkyl or aryl group of 1 to 10 carbon atoms; R 3 and R 4 are independently selected from H or any R 2 group, and R 3 and R 4 together contain at least 3 carbon atoms; wherein B is a repeating unit derived from an ionic hydrophilic monomer the unit having the structure: ##STR9## wherein R=--H or --CH 3 ; n=0.5 to 100 mole %: W=--OR 5 -- or --NR 6 R 7 --; R 5 =--H or straight, branched, or cyclic alkylene or arylene groups of 1 to 10 carbon atoms; R 6 =--H or straight, branched, or cyclic alkyl or aryl groups from 1 to 6 carbon atoms; R 7 =straight, branched, or cyclic alkylene or arylene groups of 1 to 10 carbon atoms, and Q is an ion forming functional group independently selected from: a) --NH 2 or the acid addition salt --NH 2 :HX, where X is an acid anion, or b) --CO 2 M, --SO 3 M, --OSO 3 M, and --OPO 3 M, where M is a cation; and wherein the polymer contains from 1×10 -5 to 4×10 -3 grams/mole of ion forming functional groups.
Claim 7
Dependent Claim
23 words
The photographic element of claim 4 wherein the polymer is further comprised of repeating units derived from a non-ionic hydrophilic ethylenically unsaturated monomer.
Claim 8
Dependent Claim
26 words
The photographic element of claim 5 wherein the polymer is further comprised of repeating units derived from a non-ionic hydrophilic methacrylate, acrylate, acrylamide or methacrylamide monomer.
Claim 9
Dependent Claim
56 words
The photographic element of claim 4 wherein R 2 and R 3 are unsubstituted straight, branched or cyclic alkyl groups of 4 to 8 carbons and R 4 is an H and wherein R 5 and R 7 are straight, branched or cyclic alkylene groups of 3 to 8 carbons and R 6 is an H.
Claim 10
Dependent Claim
21 words
The photographic element of claim 4 wherein E is --NR 3 R 4 and W is --NR 6 R 7 --.
Claim 11
Dependent Claim
57 words
The photographic element of claim 4 wherein A is independently selected from the group of hydrophobic monomers consisting of N-isopropylacrylamide, N-t-butylacrylamide, N-butylacrylamide, N-t-butylmethacrylamide, N-(1,1-dimethyl-3-oxobutyl)-acrylamide, N-butylmethacrylate, 2-ethyl-hexylmethacrylate and benzylmethacrylate; and wherein B is independently selected from the group of hydrophilic ionic monomers consisting of N-(3-aminopropyl)methacrylamide hydrochloride, aminoethylmethacrylate hydrochloride, sulfo-ethyl methacrylate sodium salt, N-(2-sulfo-1, 1-dimethyl-ethyl)acrylamide sodium salt and N-2-carboxyethylacrylamide.
Claim 12
Dependent Claim
27 words
The photographic element of claim 9 wherein the polymer is further comprised of a hydrophilic non-ionic monomer selected from the group consisting of acrylamide, methylene-bis-acrylamide and hydroxyethylmethacrylate.
Claim 13
Dependent Claim
18 words
The photographic element of any one of claims 1, 2, 4, and 9 wherein the polymer is cationic.
Claim 14
Dependent Claim
29 words
The photographic element of any one of claims 1, 2, 4 and 9 wherein the polymer contains about 5×10 -5 to 2×10 -3 moles/gram of ion forming functional groups.
Claim 15
Dependent Claim
16 words
The photographic element of claim 9 wherein A is N-t-butylacrylamide and B is N-(3-aminopropyl) methacrylamide hydrochloride.
Claim 16
Dependent Claim
23 words
The photographic element of any one of claims 1, 2, 4 and 9 wherein the polymer layer further comprises up to 25% gelatin.
Claim 17
Dependent Claim
25 words
The photographic element of any one of claims 1, 2, 4, and 9 wherein the DIR compound releases a development inhibitor containing a timing group.
Claim 18
Dependent Claim
24 words
The photographic element of anyone of claims 1, 2, 4 and 9 wherein the polymer layer is associated with a surfactant or surfactant-like compound.
Claim 19
Dependent Claim
26 words
The photographic element of claim 16 wherein the surfactant or surfactant-like compound has a charge opposite to that of the polymer contained in the polymer layer.
Claim 20
Independent Claim
36 words
A method of forming a photographic image in an imagewise exposed photographic element of any one of claims 1, 2, 4, 9 and 15 comprising developing the photographic image by means of a color developing agent.
References Cited (Backward Citations)
US2555646A
Cited
GB1466600A
Cited
US3576628A
Cited
US3455686A
Cited
US3706557A
Cited
US3765893A
Cited
US3819379A
Cited
US3867152A
Cited
US3888669A
Cited
US3984245A
Cited
FR2331817A1
Cited
US4055429A
Cited
US4088499A
Cited
US4248962A
Cited
US4317892A
Cited
US4214047A
Cited
US4396706A
Cited
EP0073763A1
Cited
US4575841A
Cited
US4440848A
Cited
US4865946A
Cited
US4504569A
Cited
US4722885A
Cited
JPS61236542A
Cited
US4822727A
Cited
EP0271797A2
Cited
JPH01304460A
Cited
EP0358187A2
Cited
WO1991015526A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-18 | 1997-04-19 | 1997-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-18 | 2001-04-19 | 2001-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-18 | 2005-04-19 | 2005-10-19 | $7700.00 | Window Closed / Lapsed |