Patent US2280223A successfully refreshed from Google Patents.
US2280223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated electrode and welding rod
Assignee: Individual
•
Filing: 1940-03-06
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Granted: 1942-04-21
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Expires: 1960-03-06
Abstract
No abstract record available.
Inventors
- 👤 Dumpelmann Richard
- 👤 Ehlers Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3046; B23K35/32; B23K35/327
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-04-20 | 1945-10-20 | 1946-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-20 | 1949-10-20 | 1950-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-20 | 1953-10-20 | 1954-04-21 | $7700.00 | Window Closed / Lapsed |