Patent US2433720A successfully refreshed from Google Patents.
US2433720A
Expired / Lapsed
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Thermal relay with replaceable tripping unit
Assignee: Schneider Electric USA Inc
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Filing: 1943-08-12
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Granted: 1947-12-30
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Expires: 1963-08-12
Abstract
No abstract record available.
Inventors
- 👤 Hermon L Van Valkenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:47
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/74; H01H71/7409; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1724675A
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US1708222A
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US2048114A
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US2015633A
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US2027721A
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US2039036A
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US2185524A
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US2354157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |