US2669640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submerged-melt electric series-arc welding
Assignee: Union Carbide Corp
•
Filing: 1950-05-22
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Granted: 1954-02-16
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Expires: 1970-05-22
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Outcalt
- 👤 Edward L Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:43
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/18; B23K9/186; B23K9/188; B23K9/06; B23K9/067; B23K9/0672; B23K9/0678; B23K9/12; B23K9/124; B23K9/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1707433A
Cited
US1942055A
Cited
US2402165A
Cited
US2423515A
Cited
US2401722A
Cited
US2494718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |