US1384308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane-screw
Assignee: WILLIAM HENDRY BARKER
•
Filing: 1917-10-23
•
Granted: 1921-07-12
•
Expires: 1937-10-23
Abstract
No abstract record available.
Inventors
- 👤 Giers Clarence A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:30
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B64C11/20; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1924-07-11 | 1925-01-10 | 1925-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-07-11 | 1929-01-10 | 1929-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-07-11 | 1933-01-10 | 1933-07-12 | $7700.00 | Window Closed / Lapsed |