US2998561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit for a stored-energy welder
Assignee: Robotron Corp
•
Filing: 1956-05-25
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Granted: 1961-08-29
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Expires: 1976-05-25
Abstract
No abstract record available.
Inventors
- 👤 Stuart C Rockafellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:24
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2294388A
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US2278431A
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US2340694A
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US2426256A
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US2413941A
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US2472838A
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US2498640A
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US2630557A
Cited
US2775731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |