US2217564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined air-speed indicator and rate-of-climb indicator
Assignee: Askania Werke AG
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Filing: 1938-07-19
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Granted: 1940-10-08
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Expires: 1958-07-19
Abstract
No abstract record available.
Inventors
- 👤 Scriba Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:27
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/14; G01P3/00; G01P3/62; Y; Y10; Y10S; Y10S116/00; Y10S116/43
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) | 1943-10-08 | 1944-04-08 | 1944-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-08 | 1948-04-08 | 1948-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-08 | 1952-04-08 | 1952-10-08 | $7700.00 | Window Closed / Lapsed |