Patent US3387112A successfully refreshed from Google Patents.
US3387112A
Expired / Lapsed
US
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Resistance welder control circuit with up-down slope control and current regulator circuits
Assignee: Schneider Electric USA Inc
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Filing: 1964-09-08
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Granted: 1968-06-04
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Marvin A Guettel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:42
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/248; G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |