US2786934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flux back-up wheel for welding
Assignee: American Pipe and Construction Co
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Filing: 1956-01-16
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Granted: 1957-03-26
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Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 Burl B Ohnstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:37
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/035; B23K9/0352
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |