US3409726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for stirring molten metal in an electric furnace
Assignee: Tohoku Special Steel Works Ltd
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Filing: 1965-07-09
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Granted: 1968-11-05
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Expires: 1985-07-09
Abstract
No abstract record available.
Inventors
- 👤 Matsumoto Jiro
- 👤 Abe Arimicihi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:09
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5241; C21C5/5247; B; B01; B01F; B01F33/00; B01F33/45; B01F33/451; C21C5/5229; F; F27; F27B; F27B3/00; F27B3/08; F27B3/085; F27D; F27D27/00; H; H05; H05B; H05B6/00; H05B6/02; H05B6/34; B01F2101/00; B01F2101/45; F27D3/00; F27D2003/0034; F27D2003/0039; H05B2213/00; H05B2213/02; Y; Y02; Y02P; Y02P10/00; Y02P10/25
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |