Patent US3370119A successfully refreshed from Google Patents.
US3370119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow electrode for arc furnaces
Assignee: Evonik Operations GmbH
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Filing: 1966-10-26
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Granted: 1968-02-20
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Expires: 1986-10-26
Abstract
No abstract record available.
Inventors
- 👤 Grimm Ludwig
- 👤 Kaess Franz
- 👤 Kick Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:21
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085; H05B7/10; H05B7/103; H05B7/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A HOLLOW ELECTRODE FOR ARC FURNACES COMPRISING A SHELL OF ELECTRODE MATERIAL FORMING THE ELECTRODE BODY, AN INNER TUBE INSIDE SAID BODY, AN ADMISSION TUBE OPENING INTO SAID INNER TUBE, A BRANCH OF SAID ADMISSION TUBE OF APPROXIMATELY THE SAME DIAMERTER AS SAID INNER TUBE EXTENDING SAID INNER TUBE UPWARDLY COAXIALLY THEREWITH, EXPANSIBLE CLOSURE PLUG MEANS VERTICALLY MOVABLE IN SAID BRANCH TUBE AND INLET TUBE, AND MEANS ACTUATED FROM THE OUTSIDE FOR DISPLACING SAID PLUG MEANS.
Claim 2
Dependent Claim
76 words
A HOLLOW ELECTRODE FOR ARC FURNACES COMPRISING A SHELL OF ELECTRODE MATERIAL FORMING THE ELECTRODE BODY, AN INNER TUBE INSIDE SAID BODY, AN ADMISSION TUBE OPENING INTO SAID INNER TUBE, A BRANCH OF SAID ADMISSION TUBE OF APPROXIMATELY THE SAME DIAMERTER AS SAID INNER TUBE EXTENDING SAID INNER TUBE UPWARDLY COAXIALLY THEREWITH, EXPANSIBLE CLOSURE PLUG MEANS VERTICALLY MOVABLE IN SAID BRANCH TUBE AND INLET TUBE, AND MEANS ACTUATED FROM THE OUTSIDE FOR DISPLACING SAID PLUG MEANS.
References Cited (Backward Citations)
US430453A
Cited
US1640735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |