Patent US3014121A successfully refreshed from Google Patents.
US3014121A
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US
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Welding ground machine
Assignee: CHARLOTTE TANK Corp
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Filing: 1958-10-13
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Granted: 1961-12-19
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Expires: 1978-10-13
Abstract
No abstract record available.
Inventors
- 👤 Glyn A Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:17
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US935346A
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US2296286A
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US2424892A
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US2479197A
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US2475051A
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US2439371A
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US2540180A
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US2753826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |