US3471626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow electrode control device
Assignee: Elkem Metals Co LP
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Filing: 1968-03-21
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Granted: 1969-10-07
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Expires: 1988-03-21
Abstract
No abstract record available.
Inventors
- 👤 Richard O De Weese
- 👤 C Frank Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:10
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; F; F27; F27B; F27B3/00; F27B3/08; F27B3/085; F27B3/10; F27B3/18; F27B3/183; F27D; F27D11/00; F27D11/08; F27D19/00; F27D3/00; F27D3/18; F27D2019/0028; F27D2019/0075; F27D7/00; F27D7/02
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) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |