US3392227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for arc furnaces
Assignee: JAN ERIK OSTBERG
•
Filing: 1966-07-13
•
Granted: 1968-07-09
•
Expires: 1986-07-13
Abstract
No abstract record available.
Inventors
- 👤 Ostberg Jan-Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:39
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/10; H05B7/101; H05B7/06; H05B7/08; H05B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AN ELECTRODE FOR ELECTRIC ARC FURNACES COMPRISING AN UPPER HEAD, A LOWER HEAD OF CONDUCTIVE MATERIAL, A CONDUCTIVE METAL STRUCTURE CONNECTING SAID HEADS, AN ELECTRODE HEAD CARRIED BY SAID LOWER HEAD, AND A CERAMIC COVERING ENCLOSING SAID METALLIC STRUCTURE.
Claim 2
Dependent Claim
39 words
AN ELECTRODE FOR ELECTRIC ARC FURNACES COMPRISING AN UPPER HEAD, A LOWER HEAD OF CONDUCTIVE MATERIAL, A CONDUCTIVE METAL STRUCTURE CONNECTING SAID HEADS, AN ELECTRODE HEAD CARRIED BY SAID LOWER HEAD, AND A CERAMIC COVERING ENCLOSING SAID METALLIC STRUCTURE.
References Cited (Backward Citations)
US2052796A
Cited
US2871533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |