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US2008058A
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US
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Apparatus for determining the true horizon independently of sight
Assignee: DEUTSCHE LUFTFAHRT- und HANDELS-AKTIEN-GESELLSCHAFT
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Filing: 1931-10-14
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Granted: 1935-07-16
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Expires: 1951-10-14
Abstract
No abstract record available.
Inventors
- 👤 Boykow Johann Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:01
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/44; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/1261; Y10T74/1279
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) | 1938-07-15 | 1939-01-14 | 1939-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-15 | 1943-01-14 | 1943-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-15 | 1947-01-14 | 1947-07-16 | $7700.00 | Window Closed / Lapsed |