Patent US4188660A successfully refreshed from Google Patents.
Patent US2684654A successfully refreshed from Google Patents.
US2684654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propeller and mounting therefor
Assignee: Individual
•
Filing: 1950-03-22
•
Granted: 1954-07-27
•
Expires: 1970-03-22
Abstract
No abstract record available.
Inventors
- 👤 Harold I Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:21
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/26; B63B; B63B3/00; B63B3/14; B63B3/42; B63H23/00; B63H23/32; B63H23/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |