US2904681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feedback amplifier for extending the useful frequency range of an accelerometer
Assignee: Individual
•
Filing: 1954-09-15
•
Granted: 1959-09-15
•
Expires: 1974-09-15
Abstract
No abstract record available.
Inventors
- 👤 Jr John L Jones
- 👤 Lloyd D Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:57
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/12; G01P15/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2139916A
Cited
US2383888A
Cited
US2568797A
Cited
US2697757A
Cited
US2741723A
Cited
US2725492A
Cited
US2811591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |