US3138453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten electrodes
Assignee: Individual
•
Filing: 1962-03-13
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Granted: 1964-06-23
•
Expires: 1982-03-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Ellis L Foster
- 👤 Ray R Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:53
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/222; B23K35/02; B23K35/0205; C; C22; C22C; C22C27/00; C22C27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS OF REDUCING THE ERODIBILITY OF A TUNGSTEN ELECTRODE DURING USE FOR ARC-MELTING CONSISTING OF STRIKING AN ARC BETWEEN YTTRIUM METAL AND THE TUNGSTEN ELECTRODE, WHEREBY YTTRIUM MELTS AND COATS SAID ELECTRODE.
Claim 2
Dependent Claim
33 words
A PROCESS OF REDUCING THE ERODIBILITY OF A TUNGSTEN ELECTRODE DURING USE FOR ARC-MELTING CONSISTING OF STRIKING AN ARC BETWEEN YTTRIUM METAL AND THE TUNGSTEN ELECTRODE, WHEREBY YTTRIUM MELTS AND COATS SAID ELECTRODE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |