Patent US3389333A successfully refreshed from Google Patents.
US3389333A
Expired / Lapsed
US
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Control system for maintaining a desired magnetic field in a given space
Assignee: Vickers Inc
•
Filing: 1964-02-10
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Granted: 1968-06-18
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Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Wolff Norman
- 👤 Niels C Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2697186A
Cited
US2834939A
Cited
US2715198A
Cited
US2802983A
Cited
GB604329A
Cited
US2507301A
Cited
US3080507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |