US1392451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-lifting device
Assignee: Individual
•
Filing: 1920-11-10
•
Granted: 1921-10-04
•
Expires: 1940-11-10
Abstract
No abstract record available.
Inventors
- 👤 William N Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:42
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/247; B61; B61K; B61K5/00; B61K5/04
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) | 1924-10-03 | 1925-04-04 | 1925-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-10-03 | 1929-04-04 | 1929-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-10-03 | 1933-04-04 | 1933-10-04 | $7700.00 | Window Closed / Lapsed |