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Patent US3378671A successfully refreshed from Google Patents.
US3378671A
Expired / Lapsed
US
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Nonconsumable arc-melting and arc-welding electrodes
Assignee: RTX Corp
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Filing: 1965-10-14
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Granted: 1968-04-16
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Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 Robert W Harrison
- 👤 Eugene J Delgrosso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:23
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/222
Claims Analysis
Total Claims: 0
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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) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |