US1769203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter
Assignee: Individual
•
Filing: 1929-04-30
•
Granted: 1930-07-01
•
Expires: 1949-04-30
Abstract
No abstract record available.
Inventors
- 👤 John P Buckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:03
CPC Classifications
B; B64; B64U; B64U10/00; B64U10/60; B64U50/00; B64U50/10; B64U50/13; B64U70/00; B64U70/80; B64U70/83; B64U10/10; B64U10/13; B64U2101/00; B64U2101/15; B64U2101/18; B64U2101/30; B64U2201/00; B64U2201/20; B64U2201/202; B64U30/00; B64U30/20; B64U30/29; B64U50/19
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) | 1933-06-30 | 1933-12-30 | 1934-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-30 | 1937-12-30 | 1938-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-30 | 1941-12-30 | 1942-07-01 | $7700.00 | Window Closed / Lapsed |