US2064469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for and method of controlling high frequency currents
Assignee: RCA Corp
•
Filing: 1933-10-23
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Granted: 1936-12-15
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Expires: 1953-10-23
Abstract
No abstract record available.
Inventors
- 👤 Andrew V Haeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:46
CPC Classifications
H; H03; H03B; H03B13/00; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/78; H01J31/00; H01J31/02; H01J31/04; H03K; H03K17/00; H03K17/51; H03K17/52
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) | 1939-12-15 | 1940-06-15 | 1940-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-12-15 | 1944-06-15 | 1944-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-12-15 | 1948-06-15 | 1948-12-15 | $7700.00 | Window Closed / Lapsed |