US2458022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altimeter
Assignee: AIRPATH INSTR Co
•
Filing: 1944-08-09
•
Granted: 1949-01-04
•
Expires: 1964-08-09
Abstract
No abstract record available.
Inventors
- 👤 James O Phelps
- 👤 George W Cottrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:18
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/10; G01L7/104; G01L19/00; G01L19/08; Y; Y10; Y10S; Y10S116/00; Y10S116/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |