Patent US2012339A successfully refreshed from Google Patents.
US2012339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier
Assignee: Electrons Inc
•
Filing: 1931-01-07
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Granted: 1935-08-27
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Expires: 1951-01-07
Abstract
No abstract record available.
Inventors
- 👤 Donald V Edwards
- 👤 Earl K Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:45
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/50; H01J17/52; H01J17/54; H01J17/56
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) | 1938-08-26 | 1939-02-25 | 1939-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-08-26 | 1943-02-25 | 1943-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-08-26 | 1947-02-25 | 1947-08-27 | $7700.00 | Window Closed / Lapsed |