Patent US2854292A successfully refreshed from Google Patents.
US2854292A
Expired / Lapsed
US
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Welding chair
Assignee: LEHIGH CONSTRUCTION Co IN
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Filing: 1957-03-29
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Granted: 1958-09-30
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Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 John M Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:35
CPC Classifications
B; B23; B23K; B23K5/00; B23K5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US623675A
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US1318479A
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US1192798A
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US1458744A
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US1868187A
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US2381810A
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US2433090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |