US3431344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system providing supply circuit impedance balance control for electric arc furnaces
Assignee: Westinghouse Electric Corp
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Filing: 1965-11-15
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Granted: 1969-03-04
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Expires: 1985-11-15
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Borrebach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/10; H05B7/109; H02; H02J; H02J3/00; H02J3/12; H02J3/16; H05B7/144; H05B7/148; Y; Y02; Y02E; Y02E40/00; Y02E40/30; 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) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |