US2431903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control circuits
Assignee: General Electric Co
•
Filing: 1941-01-16
•
Granted: 1947-12-02
•
Expires: 1961-01-16
Abstract
No abstract record available.
Inventors
- 👤 Ernst F W Alexanderson
- 👤 Albert H Mittag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:33
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/125; H02H7/127; H02M; H02M1/00; H02M1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20317E
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US1935460A
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US2015538A
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US2130902A
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US2137148A
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US2190775A
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US2250961A
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US2248625A
Cited
US2248600A
Cited
US2248626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |