Patent US3431391A successfully refreshed from Google Patents.
US3431391A
Expired / Lapsed
US
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Electrode nozzle
Assignee: Welding Research Institute - Industrial Institute SR
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Filing: 1965-10-23
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Granted: 1969-03-04
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Elemir Ehrenstein
- 👤 Ivan Slabon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:24
CPC Classifications
B; B23; B23K; B23K25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2179108A
Cited
US2756310A
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US2827550A
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US2829236A
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US3038059A
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US3112392A
Cited
US3172991A
Cited
US3213261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |