US2483409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning arrangement for thermionic valve circuits
Assignee: International Standard Electric Corp
•
Filing: 1943-11-06
•
Granted: 1949-10-04
•
Expires: 1963-11-06
Abstract
No abstract record available.
Inventors
- 👤 Gold William Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:26
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/16; H03G; H03G5/00; H03G5/16; H03G5/24; H03G5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1645850A
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US1626724A
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US1907965A
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GB441691A
Cited
US2231996A
Cited
US2266065A
Cited
US2182377A
Cited
US2270917A
Cited
US2358454A
Cited
US2376667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |