US2647052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide emulsion containing symmetrical carbocyanine dyes
Assignee: EIDP Inc
•
Filing: 1951-02-20
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Granted: 1953-07-28
•
Expires: 1971-02-20
Abstract
No abstract record available.
Inventors
- 👤 Martin Elmore Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:57
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COLLOID SILVER HALIDE EMULSION CONTAINING A DYE HAVING THE GENERAL FORMUAL:
Claim 2
Dependent Claim
12 words
A COLLOID SILVER HALIDE EMULSION CONTAINING A DYE HAVING THE GENERAL FORMUAL:
References Cited (Backward Citations)
US2353164A
Cited
US2340882A
Cited
US2166736A
Cited
US2263749A
Cited
US2322015A
Cited
US2338782A
Cited
US2320654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |