US2632704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing silver-halide dispersions
Assignee: Eastman Kodak Co
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Filing: 1950-03-31
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Granted: 1953-03-24
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Expires: 1970-03-31
Abstract
No abstract record available.
Inventors
- 👤 Wesley G Lowe
- 👤 Louis M Minsk
- 👤 William O Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; Y; Y10; Y10S; Y10S260/00; Y10S260/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD OF FORMING A DISPERSION OF SILVER HALIDE ADAPTED TO THE PREPARATION OF PHOTOGRAPHIC EMULSIONS WHICH COMPRISES MIXING TOGETHER A WATER-SOLUBLE SILVER SALT AND A WATERSOLUBLE INORGANIC HALIDE IN A DILUTE AQUEOUS SOLUTION OF A POLYMER SELECTED FROM THE GROUP CONSISTING OF (1) THE COPOLYMERS RESULTING FROM THE POLYMERIZATION OF A MIXTURE OF AN ACRYLIC ACID, ACRYL AMIDE AND ACRYLONITRILE, THE ACRYLIC ACID, BEING 2 1/2-15% OF THE TOTAL COMPOSITION, THE REMAINDER BEING ACRYLONITRILE AND ACRYLAMIDE IN A RATIO OF THE FORMER TO THE LATTER OF FROM 1:5 TO 1:1 AND (2) THE COPOLYMERS RESULTING FROM THE POLYMERIZATION OF A MIXTURE OF AN ACRYLIC ACID, ACRYLAMIDE AND METHYL VINYL KETONE, THE ACRYLIC ACID BEING 2 1/2-15% OF THE TOTAL COMPOSITION, THE REMAINDER BEING METHYL VINYL KETONE AND ACRYL AMIDE IN A RATIO OF THE FORMER TO THE LATTER OF FROM 1:12 TO 1:5.
Claim 2
Independent Claim
144 words
A METHOD OF FORMING A DISPERSION OF SILVER HALIDE ADAPTED TO THE PREPARATION OF PHOTOGRAPHIC EMULSIONS WHICH COMPRISES MIXING TOGETHER A WATER-SOLUBLE SILVER SALT AND A WATERSOLUBLE INORGANIC HALIDE IN A DILUTE AQUEOUS SOLUTION OF A POLYMER SELECTED FROM THE GROUP CONSISTING OF (1) THE COPOLYMERS RESULTING FROM THE POLYMERIZATION OF A MIXTURE OF AN ACRYLIC ACID, ACRYL AMIDE AND ACRYLONITRILE, THE ACRYLIC ACID, BEING 2 1/2-15% OF THE TOTAL COMPOSITION, THE REMAINDER BEING ACRYLONITRILE AND ACRYLAMIDE IN A RATIO OF THE FORMER TO THE LATTER OF FROM 1:5 TO 1:1 AND (2) THE COPOLYMERS RESULTING FROM THE POLYMERIZATION OF A MIXTURE OF AN ACRYLIC ACID, ACRYLAMIDE AND METHYL VINYL KETONE, THE ACRYLIC ACID BEING 2 1/2-15% OF THE TOTAL COMPOSITION, THE REMAINDER BEING METHYL VINYL KETONE AND ACRYL AMIDE IN A RATIO OF THE FORMER TO THE LATTER OF FROM 1:12 TO 1:5.
References Cited (Backward Citations)
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US2376371A
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US2484456A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |