Patent US4100839A successfully refreshed from Google Patents.
US2002193A
Expired / Lapsed
US
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High frequency network
Assignee: RCA Corp
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Filing: 1931-10-28
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Granted: 1935-05-21
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Expires: 1951-10-28
Abstract
No abstract record available.
Inventors
- 👤 Tellegen Bernardus Do Hubertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:07
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161; H03H7/17; H03H7/1708; H03H7/1716; H03H7/1725
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) | 1938-05-20 | 1938-11-19 | 1939-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-20 | 1942-11-19 | 1943-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-20 | 1946-11-19 | 1947-05-21 | $7700.00 | Window Closed / Lapsed |