Patent US1980978A successfully refreshed from Google Patents.
US1980978A
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Method and apparatus for advancing film past a place of recording or reproduction
Assignee: AGA Baltic Radio AB
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Filing: 1931-06-15
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Granted: 1934-11-20
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Expires: 1951-06-15
Abstract
No abstract record available.
Inventors
- 👤 Anderson Emil Einar Wilhelm
- 👤 Johanson Georg Karl Vilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/34
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) | 1937-11-19 | 1938-05-21 | 1938-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-11-19 | 1942-05-21 | 1942-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-11-19 | 1946-05-21 | 1946-11-20 | $7700.00 | Window Closed / Lapsed |