US2441789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic switching system aided by space-discharge device
Assignee: General Electric Co
•
Filing: 1944-06-28
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Granted: 1948-05-18
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Expires: 1964-06-28
Abstract
No abstract record available.
Inventors
- 👤 Maurice E Bivens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:00
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/248; H; H01; H01H; H01H9/00; H01H9/54; H01H9/541; H01H9/542
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) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |