Patent US2672544A successfully refreshed from Google Patents.
US2672544A
Expired / Lapsed
US
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Apparatus for welding by means of electromagnetic induction heating
Assignee: MAROCAINE TECH ET COMMERCIALE
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Filing: 1949-11-22
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Granted: 1954-03-16
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Expires: 1969-11-22
Abstract
No abstract record available.
Inventors
- 👤 Finchelstein Lazare
- 👤 Baffrey Antoine Rodolphe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:00
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/01; B23K13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1201929A
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US1842461A
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US1915082A
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US2582963A
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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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |