US2744945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite furnace electrode for a stabilized arc
Assignee: Union Carbide Corp
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Filing: 1955-03-11
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Granted: 1956-05-08
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Expires: 1975-03-11
Abstract
No abstract record available.
Inventors
- 👤 Harry V Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:57
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/14; H05B7/06; H05B7/08; H05B7/085; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/556
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
THE COMBINATION OF A PAIR OF GRAPHITE ARC FURNACE ELECTRODE SECTIONS AND A THREADED GRAPHITE NIPPLE JOINING SUCH SECTIONS, EACH OF THE ELECTRODE SECTION HAVING THEREIN A LONGITUDINAL HOLE LARGE ENOUGH TO STABILIZE AN ARC BEING FORMED BETWEEN SAID ELECTRODE AND MATERIAL IN THE FURNACE, AND SUBSTANTIALLY REDUCE THE PRESENCE OF AN ARC ON A LOWER OUTER SIDE SURFACE, SAID HOLE HAVING A DIAMETER OF BUT A MINOR PORTION OF THE ELECTRODE DIAMETER, SUBSTANTIALLY CIRCULAR IN CROSS SECTION AND CONTIGUOUS TO THE ELECTRODE LONGITUDINAL AXIS AND SAID NIPPLE PROVIDING A DIAPHRAGM TO PRECLUDE ANY UPDRAFT THROUGH SAID HOLE.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |