US2522240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antihunt feedback generator for recorders
Assignee: General Electric Co
•
Filing: 1947-07-23
•
Granted: 1950-09-12
•
Expires: 1967-07-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Sias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:42
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/24; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/18; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2286897A
Cited
US2050446A
Cited
US2105598A
Cited
US2113436A
Cited
US2207343A
Cited
US2482065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |