US1461866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air propellef
Assignee: Dornier Metallbauten GmbH
•
Filing: 1920-06-28
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Granted: 1923-07-17
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Expires: 1940-06-28
Abstract
No abstract record available.
Inventors
- 👤 Dornier Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:45
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B64C11/20; B64C11/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332; Y10T29/49334
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) | 1926-07-16 | 1927-01-15 | 1927-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-07-16 | 1931-01-15 | 1931-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-07-16 | 1935-01-15 | 1935-07-17 | $7700.00 | Window Closed / Lapsed |