Patent US3907573A successfully refreshed from Google Patents.
US3907573A
Expired / Lapsed
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Silver halide photographic emulsions with improved physical characteristics
Assignee: 3M Co
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Filing: 1974-03-11
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Granted: 1975-09-23
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Expires: 1994-03-11
Abstract
Abstract Silver halide photographic emulsions which contain gelatin and a hydroinsoluble dispersed polymer prepared by emulsion polymerization in the presence of a salt of a N-acyl-sarcosine.
Inventors
- 👤 Simone Franco
- 👤 Marcello Puccini
- 👤 Angelo Vallarino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:34
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/26; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
43 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION WHICH INCLUDES, AS A BINDER, A MIXTURE OF GELATIN AND AT LEAST A WATER-INSOLUBLE DISPERESED POLYMER, SAID POLYMER HAVING BEEN PREPARED BY EMULSION POLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS IN THE PRESENCE OF A DISPERSANT OF THE GENERAL FORMULA
Claim 2
Dependent Claim
43 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION WHICH INCLUDES, AS A BINDER, A MIXTURE OF GELATIN AND AT LEAST A WATER-INSOLUBLE DISPERESED POLYMER, SAID POLYMER HAVING BEEN PREPARED BY EMULSION POLYMERIZATION OF ETHYLENICALLY UNSATURATED MONOMERS IN THE PRESENCE OF A DISPERSANT OF THE GENERAL FORMULA
Claim 3
Dependent Claim
26 words
A silver halide photographic emulsion according to claim 1 wherein the dry weight ratio of gelatin to dispersed polymer ranges from about 90/10 to about 20/80.
Claim 4
Dependent Claim
31 words
The silver halide photographic emulsion according to claim 1 wherein said dispersed polymer is the reaction product of the emulsion polymerization of ethyl acrylate in the presence of sodium N-palmitoyl sarcosinate.
Claim 5
Dependent Claim
35 words
The silver halide photographic emulsion according to claim 1 wherein said dispersed polymer is the reaction product of the emulsion polymerization of a mixture of methylmethacrylate and ethyl-acrylate in the presence of sodium N-lauroyl sarcosinate.
Claim 6
Dependent Claim
36 words
The silver halide photographic emulsion according to claim 1 wherein said dispersed polymer is the copolymer resulting from the emulsion polymerization, in the presence of sodium N-lauroyl sarcosinate, of a 95/5 mixture of ethylacrylate and N-vinyl-2-oxazolidone.
Claim 7
Dependent Claim
46 words
In the preparation of a photosensitive gelatino silver halide emulsion, the improvement which comprises adding, to a gelatino silver halide photographic emulsion, a latex of a water-insoluble polymer obtained by the emulsion polymerization of ethylenically unsaturated monomers in the presence of a dispersant of the formula
Claim 8
Dependent Claim
46 words
In the preparation of a photosensitive gelatino silver halide emulsion, the improvement which comprises adding, to a gelatino silver halide photographic emulsion, a latex of a water-insoluble polymer obtained by the emulsion polymerization of ethylenically unsaturated monomers in the presence of a dispersant of the formula
Claim 9
Dependent Claim
16 words
A silver halide photographic element having at least one layer of the emulsion of claim 1.
Claim 10
Dependent Claim
14 words
The photographic emulsion of claim 1, wherein the hydrocarbon chainn carries an aromatic ring.
Claim 11
Dependent Claim
14 words
The preparation of claim 6 in which the hydrocarbon chain carries an aromatic ring.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |