Patent US2693554A successfully refreshed from Google Patents.
US2693554A
Expired / Lapsed
US
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Electrical control magnet
Assignee: Individual
•
Filing: 1953-02-04
•
Granted: 1954-11-02
•
Expires: 1973-02-04
Abstract
No abstract record available.
Inventors
- 👤 Vigren Sten Daniel
- 👤 Broberg Walter Otto Wilhelm
- 👤 Zander Rolf Albin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:51
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/34; H01H50/54; H01H50/56; H01H50/58; H01H51/00; H01H51/02; H01H51/04; H01H51/06
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |