US2421658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit interrupting device
Assignee: General Electric Co
•
Filing: 1943-04-28
•
Granted: 1947-06-03
•
Expires: 1963-04-28
Abstract
No abstract record available.
Inventors
- 👤 Harold E Strang
- 👤 Alric H Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:14
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/30; H01H85/303; H01H85/0241; H01H9/00; H01H9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB112717A
Cited
GB180824A
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GB273370A
Cited
US1631851A
Cited
US2143038A
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US2343225A
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US2306153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |