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US2542915A
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Assignee: Patelhold Patenverwertungs and Elektro-Holding AG
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Filing: 1945-04-04
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Granted: 1951-02-20
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Expires: 1965-04-04
Abstract
No abstract record available.
Inventors
- 👤 Favre Marcel Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:54
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/30; H01; H01F; H01F19/00; H01F19/02; H01F27/00; H01F27/34; H01F27/38; H01F27/385; H03; H03H; H03H7/00; H03H7/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1559850A
Cited
US1534086A
Cited
FR760016A
Cited
US2013140A
Cited
CH212712A
Cited
FR868091A
Cited
US2272452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |