US2527261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of photographic silver halide emulsions from gelatinanion soap complexes
Assignee: ILFLORD Ltd
•
Filing: 1945-10-19
•
Granted: 1950-10-24
•
Expires: 1965-10-19
Abstract
No abstract record available.
Inventors
- 👤 Hart John Alfred Henry
- 👤 Pankhurst Kenneth Georg Alfred
- 👤 Smith Robert Charles Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PHOTOGRAPHIC EMULSION COMPRISING A DISPERSION IN A PREDOMINANTLY ORGANIC SOLVENT MEDIUM OF A COMPLEX OF GELATIN WITH AN ANION SOAP WHICH IS SOLUBLE IN A SOLUTION COMPOSED OF METHYL ALCOHOL, SAID COMPLEX BEING THE ESSENTIAL BINDING AGENT FOR LIGHT-SENSITIVE SILVER HALIDE GRAINS WHICH ARE DISPERSED THERETHROUGH.
Claim 2
Dependent Claim
47 words
A PHOTOGRAPHIC EMULSION COMPRISING A DISPERSION IN A PREDOMINANTLY ORGANIC SOLVENT MEDIUM OF A COMPLEX OF GELATIN WITH AN ANION SOAP WHICH IS SOLUBLE IN A SOLUTION COMPOSED OF METHYL ALCOHOL, SAID COMPLEX BEING THE ESSENTIAL BINDING AGENT FOR LIGHT-SENSITIVE SILVER HALIDE GRAINS WHICH ARE DISPERSED THERETHROUGH.
References Cited (Backward Citations)
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US1844716A
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US2142311A
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US2258755A
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US2304940A
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GB537256A
Cited
US2282001A
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US2324831A
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GB556360A
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US2489341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |