Patent US2038507A successfully refreshed from Google Patents.
US2038507A
Expired / Lapsed
US
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Electric arc extinguishing medium
Assignee: Condit Electrical Manufacturing Corp
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Filing: 1931-10-16
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Granted: 1936-04-21
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Expires: 1951-10-16
Abstract
No abstract record available.
Inventors
- 👤 William S Edsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:26
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/22
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) | 1939-04-21 | 1939-10-21 | 1940-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-21 | 1943-10-21 | 1944-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-21 | 1947-10-21 | 1948-04-21 | $7700.00 | Window Closed / Lapsed |