US2579255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical protective system
Assignee: General Electric Co
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Filing: 1949-12-13
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Granted: 1951-12-18
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Expires: 1969-12-13
Abstract
No abstract record available.
Inventors
- 👤 Donald E Graves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:33
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/54
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) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |