Patent US2470307A successfully refreshed from Google Patents.
US2470307A
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US
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High-frequency matching transformer
Assignee: Radio Patents Corp
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Filing: 1945-04-05
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Granted: 1949-05-17
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Expires: 1965-04-05
Abstract
No abstract record available.
Inventors
- 👤 Guanella Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/005; H01; H01F; H01F19/00; H01P; H01P7/00; H01P7/02; H03H7/00; H03H7/38; H03H7/383; H03H7/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR685701A
Cited
US1852605A
Cited
US1964048A
Cited
US2102410A
Cited
US2379168A
Cited
US2362470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |