US2997633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic actuated devices
Assignee: Westinghouse Electric Corp
•
Filing: 1958-05-13
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Granted: 1961-08-22
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Expires: 1978-05-13
Abstract
No abstract record available.
Inventors
- 👤 John D Ellis
- 👤 Kurt A Grunert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:49
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/163; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/081; H01F7/16; H01F7/1638
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |