Patent US3867152A successfully refreshed from Google Patents.
US3867152A
Expired / Lapsed
US
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Photographic silver halide material
Assignee: Agfa Gevaert NV
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Filing: 1973-05-29
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Granted: 1975-02-18
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Expires: 1993-05-29
Abstract
Abstract Polymeric compounds having recurring units of the formula: WHEREIN: X is hydrogen or methyl, A is C1-C5 alkylene and R is alkyl or aryl, ARE DESCRIBED FOR USE IN PHOTOGRAPHIC SILVER HALIDE MATERIAL. The compounds reduce the formation of sludge and pressure marks upon processing, especially processing at elevated temperature, of the exposed elements.
Inventors
- 👤 Jan Jozef Priem
- 👤 Winter Walter Frans De
- 👤 Jan Bernard Lambrechts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:06
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
PHOTOGRAPHIC SLVER HALIDE MATERIAL TO BE FURTHER PROCESSED COMPRISING A SUPPORT AND AT LEAST NE SILVER HALIDE EMULSION LAYER WHEREIN THE SAID EMULSION LAYER OR A HYDROPHILLIC COLLOID LAYER IN WATER-PERMEABLE RELATIONSHIP WITH THE SAID EMULSION LAYER COMPRISES A POLYMERIC COMPOUND COMPRISING RECURRING UNITS OF THE FORMULA:
Claim 2
Dependent Claim
47 words
PHOTOGRAPHIC SLVER HALIDE MATERIAL TO BE FURTHER PROCESSED COMPRISING A SUPPORT AND AT LEAST NE SILVER HALIDE EMULSION LAYER WHEREIN THE SAID EMULSION LAYER OR A HYDROPHILLIC COLLOID LAYER IN WATER-PERMEABLE RELATIONSHIP WITH THE SAID EMULSION LAYER COMPRISES A POLYMERIC COMPOUND COMPRISING RECURRING UNITS OF THE FORMULA:
Claim 3
Dependent Claim
29 words
Photographic silver halide material according to claim 1 wherein the ratio of hydrophilic colloid binder to silver halide in the said emulsion layer is comprised between 0.2 and 0.6.
Claim 4
Dependent Claim
19 words
Photographic silver halidE material according to claim 1, wherein the polymer is present in a protective gelatin antistress layer.
Claim 5
Dependent Claim
35 words
Photographic material according to claim 1, wherein the said polymeric compound is present in the said layer in an amount of 5 to 50 percent by weight relative to the weight of the hydrophilic colloid.
Claim 6
Dependent Claim
14 words
Photographic material according to claim 1 wherein the emulsion is a silver bromoiodide emulsion.
Claim 7
Dependent Claim
46 words
Method of producing photographic images by processing of an exposed photographic silver halide material comprising at least one silver halide emulsion layer wherein the said emulsion layer or a hydrophilic colloid layer in water-permeable relationship therewith comprises a polymeric compound having recurring units of the formula:
Claim 8
Dependent Claim
46 words
Method of producing photographic images by processing of an exposed photographic silver halide material comprising at least one silver halide emulsion layer wherein the said emulsion layer or a hydrophilic colloid layer in water-permeable relationship therewith comprises a polymeric compound having recurring units of the formula:
Claim 9
Dependent Claim
13 words
Method according to claim 6, wherein processing occurs at a temperature above 30*C.
Claim 10
Dependent Claim
34 words
Method according to claim 6, wherein the said polymeric compound is present in the said layer in an amount of 5 to 50 percent by weight relative to the weight of dry hydrophilic colloid.
Claim 11
Dependent Claim
25 words
Method according to claim 6, wherein in the said emulsion layer the ratio of hydrophilic colloid to silver halide is comprised between 0.2 and 0.6.
Claim 12
Dependent Claim
13 words
Method according to claim 6, wherein the emulsion is a silver bromoiodide emulsion.
Claim 13
Dependent Claim
16 words
Method according to claim 6, wherein the polymer is present in a protective gelatin antistress layer.
Claim 14
Dependent Claim
14 words
Method according to claim 6, wherein processing occurs by means of a hardening developer.
Claim 15
Dependent Claim
10 words
Method according to claim 12, wherein the developer comprises glutaraldehyde.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |