US2439844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier and oscillator circuit
Assignee: Bendix Aviation Corp
•
Filing: 1943-10-29
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Granted: 1948-04-20
•
Expires: 1963-10-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:06
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/04; H03; H03F; H03F3/00; H03F3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2006440A
Cited
US1894952A
Cited
US2024489A
Cited
US2173427A
Cited
US2173426A
Cited
US2244751A
Cited
US2289752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |