US2516576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-governing wind-driven propeller
Assignee: Individual
•
Filing: 1947-01-04
•
Granted: 1950-07-25
•
Expires: 1967-01-04
Abstract
No abstract record available.
Inventors
- 👤 Charles R Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:21
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/022; F03D7/0236; F05; F05B; F05B2240/00; F05B2240/20; F05B2240/202; F05B2240/2022; F05B2260/00; F05B2260/70; F05B2260/74; F05B2260/75; F05B2260/77; F05B2260/78; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |