Patent US1787749A successfully refreshed from Google Patents.
US2231684A
Expired / Lapsed
US
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Monopack film sensitized with layers containing different silver halides
Assignee: Eastman Kodak Co
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Filing: 1938-08-09
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Granted: 1941-02-11
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Expires: 1958-08-09
Abstract
No abstract record available.
Inventors
- 👤 Schinzel Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:17
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/04; G03C1/047; G03C2001/0476; G03C7/3022; G03C2007/3027
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) | 1944-02-11 | 1944-08-12 | 1945-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-11 | 1948-08-12 | 1949-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-11 | 1952-08-12 | 1953-02-11 | $7700.00 | Window Closed / Lapsed |