Patent US2929555A successfully refreshed from Google Patents.
US2929555A
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US
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Automatic control mechanism and interpolating devices therefor
Assignee: EMI Ltd
•
Filing: 1956-04-27
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Granted: 1960-03-22
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Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Spencer Rolf Edmund
- 👤 Wolfendale Frederick Caleb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:35
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/41; G05B19/4105; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2628539A
Cited
US2537427A
Cited
US2627055A
Cited
US2659849A
Cited
US2685054A
Cited
US2784359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |