Patent US2085431A successfully refreshed from Google Patents.
US2085431A
Expired / Lapsed
US
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Coated welding electrode
Assignee: JOHN A ROEBLING'S SONS Co
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Filing: 1934-05-05
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Granted: 1937-06-29
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Expires: 1954-05-05
Abstract
No abstract record available.
Inventors
- 👤 Robert S Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:23
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/40; B23K35/404
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) | 1940-06-28 | 1940-12-28 | 1941-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-28 | 1944-12-28 | 1945-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-28 | 1948-12-28 | 1949-06-29 | $7700.00 | Window Closed / Lapsed |