US2490023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding electrode
Assignee: National Cylinder Gas Co
•
Filing: 1947-02-26
•
Granted: 1949-12-06
•
Expires: 1967-02-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:10
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0255; B23K35/0261; B23K35/0277
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB292318A
Cited
US1873847A
Cited
US1944753A
Cited
US2023818A
Cited
US2025206A
Cited
GB499852A
Cited
US2430701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |