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US2770709A
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Electric flash-butt-welding machines
Assignee: THOMSON ELECTRIC WELDER Co
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Filing: 1954-06-03
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Granted: 1956-11-13
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Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Charles D Moore
- 👤 Hermann W Stieglitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:42
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/25; B23K11/251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2085049A
Cited
GB475238A
Cited
US2399453A
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US2404620A
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US2488899A
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US2492200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |