US2490751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed grain multilayer photographic film and process
Assignee: Eastman Kodak Co
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Filing: 1948-03-11
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Granted: 1949-12-06
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Expires: 1968-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Wesley T Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/58; G03C1/005; G03C1/035; G03C1/485; G03C1/48538; G03C7/00; G03C7/22; G03C7/24; G03C7/30; G03C7/3022; G03C2001/03564
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |