US2552052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull converter of the crystal type for ultra-short waves
Assignee: Compagnie des Freins et Signaux Westinghouse SA
•
Filing: 1948-04-21
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Granted: 1951-05-08
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Expires: 1968-04-21
Abstract
No abstract record available.
Inventors
- 👤 Matare Herbert Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:03
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/02; H01; H01P; H01P1/00; H01P1/005; H03D7/00; H03D7/14; H03D7/1408; H03D9/06; H03D9/0608; H03D9/0616
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2162740A
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US1998119A
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US2156660A
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US2367943A
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US2406405A
Cited
US2433566A
Cited
US2438893A
Cited
US2468845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |