US2797351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core structure for improving performance of the blown arc
Assignee: Union Carbide Corp
•
Filing: 1954-12-09
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Granted: 1957-06-25
•
Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Greider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:53
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/02; H05B31/06; H05B31/08; H05B31/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A CARBON ELECTRODE COMPRISING, A CORE STRUCTURE FOR REDUCING SUBSTANTIALLY THE VARIATION IN LIGHT INTENSITY OF SAID ELECTRODE DURING ARCING, SAID CORE STRUCTURE COMPRISING A PAIR OF ADJACENTLY AND CONCENTRICALLY DISPOSED CORES, THE OUTER CORE OF SAID CORE STRUCTURE COMPRISING ESSEN-
Claim 2
Dependent Claim
41 words
A CARBON ELECTRODE COMPRISING, A CORE STRUCTURE FOR REDUCING SUBSTANTIALLY THE VARIATION IN LIGHT INTENSITY OF SAID ELECTRODE DURING ARCING, SAID CORE STRUCTURE COMPRISING A PAIR OF ADJACENTLY AND CONCENTRICALLY DISPOSED CORES, THE OUTER CORE OF SAID CORE STRUCTURE COMPRISING ESSEN-
References Cited (Backward Citations)
US1007869A
Cited
US1261891A
Cited
US1774965A
Cited
US1775078A
Cited
US1774964A
Cited
US2552176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |