Patent US2740713A successfully refreshed from Google Patents.
US2740713A
Expired / Lapsed
US
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Sensitization of photographic emulsions
Assignee: Individual
•
Filing: 1952-04-26
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Granted: 1956-04-03
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Expires: 1972-04-26
Abstract
No abstract record available.
Inventors
- 👤 Warren Joel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:16
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/047; G03C5/00; G03C5/26; G03C5/29; G03C5/305; Y; Y10; Y10S; Y10S430/00; Y10S430/143; Y10S430/145; Y10S430/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A LIGHT SENSITIVE SILVER HALIDE PHOTOGRAPHIC EMULSION, CONTAINING A PROTAMINE AS A SENSITIZING AND ACCELERATING AGENT.
Claim 2
Dependent Claim
16 words
A LIGHT SENSITIVE SILVER HALIDE PHOTOGRAPHIC EMULSION, CONTAINING A PROTAMINE AS A SENSITIZING AND ACCELERATING AGENT.
References Cited (Backward Citations)
US1719711A
Cited
US1815983A
Cited
US2142311A
Cited
US2164687A
Cited
US2363777A
Cited
US2521925A
Cited
FR1006813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |