US3379817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode control device
Assignee: ABB Norden Holding AB
•
Filing: 1965-05-24
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Granted: 1968-04-23
•
Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Sundell Sigvard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:10
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/144; H05B7/148; H05B7/152; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
ELECTRODE CONTROL DEVICE FOR ELECTRODE FURNACES FOR PRODUCING QUIET WORKING BUT ALSO QUICK CONTROL UPON THE OCCURRENCE OF STRONG DISTURBANCES, COMPRISING AN AMPLIFIER, MEANS TO SUPPLY TO THE INPUT OF THE AMPLIFIER A SIGNAL DEPENDENT ON THE ELECTRODE CURRENT, AN ELECTRODE CONTROL MEANS, MEANS CONNECTING THE OUTPUT OF THE AMPLIFIER TO SAID ELECTRODE CONTROL MEANS, AN INTEGRATION DEVICE
Claim 2
Dependent Claim
58 words
ELECTRODE CONTROL DEVICE FOR ELECTRODE FURNACES FOR PRODUCING QUIET WORKING BUT ALSO QUICK CONTROL UPON THE OCCURRENCE OF STRONG DISTURBANCES, COMPRISING AN AMPLIFIER, MEANS TO SUPPLY TO THE INPUT OF THE AMPLIFIER A SIGNAL DEPENDENT ON THE ELECTRODE CURRENT, AN ELECTRODE CONTROL MEANS, MEANS CONNECTING THE OUTPUT OF THE AMPLIFIER TO SAID ELECTRODE CONTROL MEANS, AN INTEGRATION DEVICE
References Cited (Backward Citations)
US2809319A
Cited
US3316340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |