US2579221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outboard propeller mechanism
Assignee: Murray & Tregurtha Inc
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Filing: 1949-01-03
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Granted: 1951-12-18
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Expires: 1969-01-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Wanzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:24
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/08; B63H20/12; B63H20/14; B63H20/16
Claims Analysis
Total Claims: 0
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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) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |