US2647752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive mechanism
Assignee: General Electric Co
•
Filing: 1950-08-23
•
Granted: 1953-08-04
•
Expires: 1970-08-23
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:01
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US653698A
Cited
US672586A
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US1185559A
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US2014495A
Cited
FR799925A
Cited
US2087135A
Cited
US2166079A
Cited
US2168792A
Cited
US2229293A
Cited
US2468198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |