US2469222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal rectifier converter
Assignee: RCA Corp
•
Filing: 1943-12-01
•
Granted: 1949-05-03
•
Expires: 1963-12-01
Abstract
No abstract record available.
Inventors
- 👤 John B Atwood
- 👤 Trevor Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:32
CPC Classifications
H; H04; H04B; H04B15/00; H04B15/02; H04B15/04; H04B15/06; H03; H03D; H03D7/00; H03D7/14; H03D7/1408; H03D9/00; H03D9/06; H03D9/0608; H03D9/0625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142159A
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US1418285A
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US2106776A
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US2097514A
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US2136606A
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US2216964A
Cited
US2261879A
Cited
US2285372A
Cited
US2410122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |