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Patent US2069283A successfully refreshed from Google Patents.
US2069283A
Expired / Lapsed
US
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Electric arc device
Assignee: Westinghouse Electric Corp
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Filing: 1932-07-30
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Granted: 1937-02-02
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Expires: 1952-07-30
Abstract
No abstract record available.
Inventors
- 👤 Slepian Joseph
- 👤 Leon R Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:37
CPC Classifications
H; H01; H01J; H01J13/00; H01J13/50; H01J13/02; H01J13/48; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H01J2893/00; H01J2893/0072; H01J2893/0088
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) | 1940-02-02 | 1940-08-03 | 1941-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-02 | 1944-08-03 | 1945-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-02 | 1948-08-03 | 1949-02-02 | $7700.00 | Window Closed / Lapsed |