US2463820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water jet propulsion internalcombustion engine
Assignee: Individual
•
Filing: 1944-06-26
•
Granted: 1949-03-08
•
Expires: 1964-06-26
Abstract
No abstract record available.
Inventors
- 👤 Stafford Charles
- 👤 Reed Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:47
CPC Classifications
B; B63; B63H; B63H11/00; B63H11/12; B63H11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE228230C
Cited
US1258570A
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US1265784A
Cited
US1117351A
Cited
US1725881A
Cited
US1824074A
Cited
GB363022A
Cited
US2202087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |