Patent US2491319A successfully refreshed from Google Patents.
US2491319A
Expired / Lapsed
US
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Automatic arc welding device
Assignee: BBC Brown Boveri AG Germany
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Filing: 1946-09-20
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Granted: 1949-12-13
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Expires: 1966-09-20
Abstract
No abstract record available.
Inventors
- 👤 Kocher Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:16
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/073; B23K9/0731
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR629620A
Cited
US1869079A
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US2057521A
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US1989546A
Cited
GB373735A
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US2007751A
Cited
GB439900A
Cited
US2311462A
Cited
US2375039A
Cited
US2427744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |