US2467972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined beam indicator, compass, and gyro-horizon for aircraft
Assignee: Individual
•
Filing: 1947-04-19
•
Granted: 1949-04-19
•
Expires: 1967-04-19
Abstract
No abstract record available.
Inventors
- 👤 Richard W French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:31
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2134932A
Cited
US2262033A
Cited
US2262245A
Cited
US2400232A
Cited
US2283190A
Cited
US2326835A
Cited
US2384484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |