Patent US2808548A successfully refreshed from Google Patents.
US2808548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control systems especially for machine tools
Assignee: EMI Ltd
•
Filing: 1954-10-18
•
Granted: 1957-10-01
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Spencer Rolf Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:27
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/74; H03M1/80; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/33; G05B19/37; G05B19/371; G05B19/41; G05B19/4105; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1436
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2630552A
Cited
US2630481A
Cited
US2566831A
Cited
GB670841A
Cited
US2656497A
Cited
US2643355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |