US2514178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronizing and speed control device
Assignee: Rotol Ltd
•
Filing: 1946-06-19
•
Granted: 1950-07-04
•
Expires: 1966-06-19
Abstract
No abstract record available.
Inventors
- 👤 Chilman John Alfred
- 👤 Mapp Alfred George
- 👤 Morris Edward Hollingworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:19
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/50; Y; Y10; Y10T; Y10T74/00; Y10T74/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2261145A
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US2296177A
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US2252518A
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US2264865A
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US2319218A
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US2319552A
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US2339989A
Cited
US2412605A
Cited
US2458398A
Cited
US2431687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |