Patent US3393889A successfully refreshed from Google Patents.
US3393889A
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Static balancing systems
Assignee: Ferranti International PLC
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Filing: 1967-03-13
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Granted: 1968-07-23
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Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 Ogden Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:21
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/001; B23Q11/0017; F; F16; F16F; F16F15/00; F16F15/28; G; G01; G01B; G01B3/00; G01B3/002; G01B3/008; G01M; G01M1/00; G01M1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |