Patent US2443338A successfully refreshed from Google Patents.
US2443338A
Expired / Lapsed
US
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Circuit-breaking switch
Assignee: SOUTHERN ENGINEERING SUPPLIES
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Filing: 1943-06-22
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Granted: 1948-06-15
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Expires: 1963-06-22
Abstract
No abstract record available.
Inventors
- 👤 Berry Cyril Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:36
CPC Classifications
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Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |