US2833382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propulsion apparatus for ships or boats
Assignee: Napier Turbochargers Ltd
•
Filing: 1955-05-09
•
Granted: 1958-05-06
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Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Murray George Hamilton
- 👤 Brook Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:29
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/30; Y; Y10; Y10S; Y10S74/00; Y10S74/02; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19084
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |