US2646492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of electric arcs used in welding or metal spraying processes
Assignee: Individual
•
Filing: 1950-07-08
•
Granted: 1953-07-21
•
Expires: 1970-07-08
Abstract
No abstract record available.
Inventors
- 👤 Ballard William Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:14
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/16; B23K9/164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1911033A
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US1946305A
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US2060842A
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FR863983A
Cited
US2274631A
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US2495274A
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US2457973A
Cited
US2516016A
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US2532807A
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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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |