US2589860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altitude indicator system
Assignee: United States, WAR, Secretary of
•
Filing: 1945-12-10
•
Granted: 1952-03-18
•
Expires: 1965-12-10
Abstract
No abstract record available.
Inventors
- 👤 Beuhring W Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:41
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/913
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2252083A
Cited
US2283919A
Cited
US2287786A
Cited
US2495737A
Cited
US2415359A
Cited
US2448016A
Cited
US2479954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |