US2791673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for electric arc welding in a protective atmosphere
Assignee: Air Liquide SA
•
Filing: 1955-02-23
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Granted: 1957-05-07
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Expires: 1975-02-23
Abstract
No abstract record available.
Inventors
- 👤 Arnaud Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/16; B23K9/164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1371094A
Cited
US1911033A
Cited
US2008846A
Cited
GB439520A
Cited
US2475357A
Cited
US2468808A
Cited
US2571684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |