Patent US2781891A successfully refreshed from Google Patents.
US2781891A
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Work conveying mechanism
Assignee: Selas Corp of America
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Filing: 1951-09-26
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Granted: 1957-02-19
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Expires: 1971-09-26
Abstract
No abstract record available.
Inventors
- 👤 Quentin M Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:19
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/24; F27B9/2407; F27B9/02; F27B9/021; F27B9/025; F27D; F27D3/00; F27D2003/0034; F27D2003/0067; F27D2003/0085; F27D2003/0096; F27M; F27M2001/00; F27M2001/15; F27M2001/1539; F27M2001/1547; F27M2001/1552; Y; Y10; Y10S; Y10S198/00; Y10S198/952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319000A
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US1568958A
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US1795137A
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DE577189C
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US2248657A
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US2529690A
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US2583764A
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US2592236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |