Patent US2505043A successfully refreshed from Google Patents.
US2505043A
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US
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Means for frequency conversion
Assignee: Radio Patents Corp
•
Filing: 1947-12-17
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Granted: 1950-04-25
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Expires: 1967-12-17
Abstract
No abstract record available.
Inventors
- 👤 Guanella Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/02; H03B; H03B21/00; H03B21/01; H03B21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2094113A
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US2211750A
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US2282834A
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US2354510A
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US2405765A
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US2369268A
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US2407213A
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US2406932A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |