US2922028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc electrodes
Assignee: Union Carbide Corp
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Filing: 1957-11-25
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Granted: 1960-01-19
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Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Butler
- 👤 John A Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:08
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3442
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
AN ELECTRIC ARC ELECTRODE COMPOSED OF THE COMBINATION OF SWAGED, SUBSTANTIALLY PURE TUNGSTEN AND THORIATED TUNGSTEN PARTS ARRANGED SO THAT THE PURE TUNGSTEN SUPPORTS AND CONDUCTS THE ARC CURRENT TO THE THORIATED TUNGSTEN PART FROM WHICH AN ARC IS DRAWN CHARACTERIZED IN THAT SUCH THORIATED TUNGSTEN CONTAINS ABOUT 2% OF THORIA.
Claim 2
Dependent Claim
51 words
AN ELECTRIC ARC ELECTRODE COMPOSED OF THE COMBINATION OF SWAGED, SUBSTANTIALLY PURE TUNGSTEN AND THORIATED TUNGSTEN PARTS ARRANGED SO THAT THE PURE TUNGSTEN SUPPORTS AND CONDUCTS THE ARC CURRENT TO THE THORIATED TUNGSTEN PART FROM WHICH AN ARC IS DRAWN CHARACTERIZED IN THAT SUCH THORIATED TUNGSTEN CONTAINS ABOUT 2% OF THORIA.
References Cited (Backward Citations)
US1658713A
Cited
US2640135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |