US2445335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altitude and rate of change measuring device and control for aircraft
Assignee: Schneider Electric Systems USA Inc
•
Filing: 1941-05-03
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Granted: 1948-07-20
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Expires: 1961-05-03
Abstract
No abstract record available.
Inventors
- 👤 George A Philbrick
- 👤 Allan R Catheron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:41
CPC Classifications
G; G01; G01L; G01L13/00; G01L13/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |