Patent US2512718A successfully refreshed from Google Patents.
US2512718A
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High-frequency surface hardening
Assignee: Societe Francaise Radio Electrique
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Filing: 1945-11-02
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Granted: 1950-06-27
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Expires: 1965-11-02
Abstract
No abstract record available.
Inventors
- 👤 Grumel Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:49
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2266176A
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US2368809A
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GB467308A
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US2240493A
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US2255103A
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US2280064A
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US2282322A
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US2181899A
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US2288034A
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US2308788A
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US2416742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |