US2941120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control of rotary bladed machines
Assignee: Napier Turbochargers Ltd
•
Filing: 1957-05-13
•
Granted: 1960-06-14
•
Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Harman Rowland
- 👤 Williams Cledwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/488; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/103; G01P3/4802; H; H02; H02P; H02P23/00; H02P23/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US716131A
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US1872243A
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US2111423A
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US2542638A
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US2772378A
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US2669669A
Cited
US2728893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |