US3381079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode regulating systems for arc melting furnaces
Assignee: Allegheny Ludlum Steel Corp
•
Filing: 1964-09-18
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Granted: 1968-04-30
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Expires: 1984-09-18
Abstract
No abstract record available.
Inventors
- 👤 Jr James B Murtland
- 👤 Harold S Jackson
- 👤 Charles F Rebhun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:03
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/18; H; H05; H05B; H05B7/00; H05B7/005; H05B7/02; H05B7/10; H05B7/109; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3139473A
Cited
US3229148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |