Patent US2520112A successfully refreshed from Google Patents.
US2520112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc welding electrode
Assignee: Individual
•
Filing: 1948-04-24
•
Granted: 1950-08-29
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Expires: 1968-04-24
Abstract
No abstract record available.
Inventors
- 👤 Bourque Philip
- 👤 Kiilunen Matt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:04
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0255; B23K35/0261; B23K35/0283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1814878A
Cited
US1857521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |