US2649374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic photographic film
Assignee: Eastman Kodak Co
•
Filing: 1949-06-10
•
Granted: 1953-08-18
•
Expires: 1969-06-10
Abstract
No abstract record available.
Inventors
- 👤 Winfield S Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
AN ANTI-STATIC PHOTOGRAPHIC FILM COMPRISING A CELLULOSE ESTER SUPPORT HAVING THEREON A SILVER HALIDE EMULSION LAYER AND IN ONE OF THE LAYERS OF SAID FILM AN ALKALI METAL SALT OF THE CONDENSATION
Claim 2
Dependent Claim
32 words
AN ANTI-STATIC PHOTOGRAPHIC FILM COMPRISING A CELLULOSE ESTER SUPPORT HAVING THEREON A SILVER HALIDE EMULSION LAYER AND IN ONE OF THE LAYERS OF SAID FILM AN ALKALI METAL SALT OF THE CONDENSATION
References Cited (Backward Citations)
US1972208A
Cited
US2118059A
Cited
US2139778A
Cited
US2186734A
Cited
US2527262A
Cited
GB610941A
Cited
US2420610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |