US2542733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic exciting coil
Assignee: General Electric Co
•
Filing: 1946-08-21
•
Granted: 1951-02-20
•
Expires: 1966-08-21
Abstract
No abstract record available.
Inventors
- 👤 John F Tritle
- 👤 Jr Guy Bellows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:05
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1410395A
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US1545429A
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GB292421A
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US1844626A
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DE662235C
Cited
GB441676A
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US2207151A
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GB515891A
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US2407479A
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US2411002A
Cited
US2464568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |