Patent US1920789A successfully refreshed from Google Patents.
US1920789A
Expired / Lapsed
US
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Film driving apparatus
Assignee: General Electric Co
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Filing: 1929-12-28
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Granted: 1933-08-01
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Expires: 1949-12-28
Abstract
No abstract record available.
Inventors
- 👤 Charles L Heisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:04
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/06; B65H23/10; B65H23/14; G; G11; G11B; G11B15/00; G11B15/18; G11B15/46
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) | 1936-07-31 | 1937-01-30 | 1937-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-31 | 1941-01-30 | 1941-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-31 | 1945-01-30 | 1945-08-01 | $7700.00 | Window Closed / Lapsed |