US4115124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of immobilizing optical brighteners
Assignee: Eastman Kodak Co
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Filing: 1974-09-06
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Granted: 1978-09-19
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Expires: 1994-09-06
Abstract
Abstract The incorporation of polymers containing at least 80% by weight of substituted or unsubstituted poly(vinyl imidazole) in a photographic element containing fluorescent optical brighteners immobilizes the brighteners. The photographic elements resist loss of brightness due to photographic processing or washing.
Inventors
- 👤 Lewis R. Hamilton
- 👤 Richard C. Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:00
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C1/005; G03C1/04; G03C1/053; G03C1/815; G03C1/8155; G03C8/00; G03C8/42; G03C8/52; Y; Y10; Y10S; Y10S430/00; Y10S430/134; Y10S430/142
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
47 words
A photographic element comprising a support, at least one light sensitive emulsion layer, at least one layer containing an anionic water-soluble fluorescent optical brightener and a layer containing a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl.
Claim 2
Dependent Claim
47 words
A photographic element comprising a support, at least one light sensitive emulsion layer, at least one layer containing an anionic water-soluble fluorescent optical brightener and a layer containing a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl.
Claim 3
Dependent Claim
15 words
The photographic element of claim 1 wherein the polymer is a homopolymer of poly(vinyl imidazole).
Claim 4
Dependent Claim
15 words
The photographic element of claim 1 wherein the polymer is a homopolymer of poly(vinyl alkylimidazole).
Claim 5
Dependent Claim
12 words
The photographic element of claim 3 wherein the poly(vinyl alkylimidazole) is poly(vinyl-2-methylimidazole).
Claim 6
Dependent Claim
63 words
The photographic element of claim 1 wherein the polymer is a copolymer of at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl and a member selected from the group consisting of vinyl acetate, vinyl pyrrolidone, vinyl pyridine, acrylamide, methacrylamide, 2-acetoacetoxyethyl methacrylate, hydroxyalkyl acrylate, hydroxyalkyl methacrylate, acrylic acid, methacrylic acid, sulfonates, sulfates, and active methylene containing monomers.
Claim 7
Dependent Claim
34 words
The photographic element of claim 1 wherein the polymer is a copolymer of at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl and the remainder is acrylamide.
Claim 8
Dependent Claim
20 words
The photographic element of claim 1 wherein at least one light sensitive emulsion layer is a photographic silver halide layer.
Claim 9
Dependent Claim
15 words
The photographic element of claim 1 wherein the polymer is in a layer with gelatin.
Claim 10
Dependent Claim
21 words
The photographic element of claim 1 wherein the polymer comprises from about 3 mg/ft 2 to 300 mg/ft 2 of support.
Claim 11
Dependent Claim
31 words
The photographic element of claim 1 wherein the polymer is in an overcoat layer of the element and the optical brightener is in a layer intermediate the support and overcoat layer.
Claim 12
Dependent Claim
60 words
An integral receiver element comprising a support and at least one layer containing at least one photosensitive silver halide emulsion layer and on the same or different layer an anionic water-soluble fluorescent optical brightener and in the same or different layer a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl.
Claim 13
Dependent Claim
60 words
An integral receiver element comprising a support and at least one layer containing at least one photosensitive silver halide emulsion layer and on the same or different layer an anionic water-soluble fluorescent optical brightener and in the same or different layer a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl.
Claim 14
Independent Claim
63 words
A method of enhancing the brightness of a photographic element comprising a support, at least one light sensitive emulsion layer and at least one layer comprising an anionic water-soluble fluorescent optical brightener which comprises incorporating in the support or in one or more layers a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl.
Claim 15
Independent Claim
63 words
A method of enhancing the brightness of a photographic element comprising a support, at least one light sensitive emulsion layer and at least one layer comprising an anionic water-soluble fluorescent optical brightener which comprises incorporating in the support or in one or more layers a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl.
Claim 16
Dependent Claim
14 words
The method of claim 12 wherein the polymer is a homopolymer of poly(vinyl imidazole).
Claim 17
Dependent Claim
13 words
The method of claim 12 wherein the polymer is a homopolymer of poly(vinyl-2-methylimidazole).
Claim 18
Dependent Claim
24 words
The method of claim 12 wherein the polymer and optical brightener are incorporated into a gelatino-silver halide emulsion which is applied to a support.
Claim 19
Dependent Claim
14 words
The method of claim 12 wherein the optical brightener is incorporated in the support.
Claim 20
Dependent Claim
14 words
The method of claim 12 wherein the photographic element is a diffusion transfer element.
Claim 21
Dependent Claim
36 words
A photographic composition comprising an anionic water-soluble fluorescent optical brightener, a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl and a gelatino silver halide photographic emulsion.
Claim 22
Dependent Claim
36 words
A photographic composition comprising an anionic water-soluble fluorescent optical brightener, a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl and a gelatino silver halide photographic emulsion.
Claim 23
Dependent Claim
14 words
The composition of claim 18 wherein the polymer is a homopolymer of poly(vinyl imidazole).
Claim 24
Dependent Claim
14 words
The composition of claim 18 wherein the polymer is a homopolymer of poly(vinyl-2-methyl imidazole).
Claim 25
Dependent Claim
59 words
A photographic element comprising a support, at least one light sensitive emulsion layer, at least one layer containing an anionic water-soluble fluorescent optical brightener and in the same or different layer a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl and containing up to 20% by weight of acrylamide.
Claim 26
Dependent Claim
59 words
A photographic element comprising a support, at least one light sensitive emulsion layer, at least one layer containing an anionic water-soluble fluorescent optical brightener and in the same or different layer a polymer containing at least 80% by weight of poly(vinyl imidazole) or poly(vinyl imidazole) substituted with alkyl or aryl and containing up to 20% by weight of acrylamide.
Claim 27
Dependent Claim
41 words
A photographic element comprising a support, at least one light sensitive emulsion layer, at least one layer containing an anionic water-soluble fluorescent optical brightener and a layer containing a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl.
Claim 28
Dependent Claim
41 words
A photographic element comprising a support, at least one light sensitive emulsion layer, at least one layer containing an anionic water-soluble fluorescent optical brightener and a layer containing a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl.
Claim 29
Dependent Claim
54 words
An integral receiver element comprising a support and at least one layer containing at least one photosensitive silver halide emulsion layer and in the same or different layer an anionic water-soluble fluorescent optical brightener and in the same or different layer a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl.
Claim 30
Dependent Claim
54 words
An integral receiver element comprising a support and at least one layer containing at least one photosensitive silver halide emulsion layer and in the same or different layer an anionic water-soluble fluorescent optical brightener and in the same or different layer a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl.
Claim 31
Independent Claim
57 words
A method of enhancing the brightness of a photographic element comprising a support, at least one light sensitive emulsion layer and at least one layer comprising an anionic water-soluble fluorescent optical brightener which comprises incorporating in the support or in one or more layers a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl.
Claim 32
Independent Claim
57 words
A method of enhancing the brightness of a photographic element comprising a support, at least one light sensitive emulsion layer and at least one layer comprising an anionic water-soluble fluorescent optical brightener which comprises incorporating in the support or in one or more layers a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl.
Claim 33
Dependent Claim
30 words
A photographic composition comprising an anionic water-soluble fluorescent optical brightener, a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl and a gelatino silver halide photographic emulsion.
Claim 34
Dependent Claim
30 words
A photographic composition comprising an anionic water-soluble fluorescent optical brightener, a homopolymer of vinyl imidazole or vinyl imidazole substituted with alkyl or aryl and a gelatino silver halide photographic emulsion.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |