Patent CA553873A successfully refreshed from Google Patents.
Patent US2310531A successfully refreshed from Google Patents.
US2310531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective device
Assignee: Cutler Hammer Inc
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Filing: 1941-06-07
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Granted: 1943-02-09
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Expires: 1961-06-07
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Kuhn
- 👤 Edwin W Seeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:30
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/14; H01H71/20; H01H71/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-02-08 | 1946-08-10 | 1947-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-08 | 1950-08-10 | 1951-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-08 | 1954-08-10 | 1955-02-09 | $7700.00 | Window Closed / Lapsed |