US2472923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for striking the welding arc in automatic electric-arc welding machines
Assignee: La Soudure Electrique Autogene SA
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Filing: 1946-11-18
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Granted: 1949-06-14
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Expires: 1966-11-18
Abstract
No abstract record available.
Inventors
- 👤 Schmerber Raoul Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:58
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/067; B23K9/0672; B23K9/0677
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US412599A
Cited
US2043960A
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US2134705A
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US2326865A
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US2370100A
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US2405673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |