US2528486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric follow-up control system
Assignee: Metropolitan Vickers Electrical Co Ltd
•
Filing: 1945-08-11
•
Granted: 1950-11-07
•
Expires: 1965-08-11
Abstract
No abstract record available.
Inventors
- 👤 Dannatt Cecil
- 👤 Belsey Frederick Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:19
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1436
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE16667E
Cited
US1988458A
Cited
US2008364A
Cited
US1985982A
Cited
US2233415A
Cited
GB489271A
Cited
US2311462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |