US1121309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Course and speed indicating device for flying-machines.
Assignee: Individual
•
Filing: 1910-06-30
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Granted: 1914-12-15
•
Expires: 1930-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert M Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:10
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/22; F41G3/24; G; G01; G01C; G01C21/00; G01C21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1917-12-14 | 1918-06-15 | 1918-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-12-14 | 1922-06-15 | 1922-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-12-14 | 1926-06-15 | 1926-12-15 | $7700.00 | Window Closed / Lapsed |