Patent US2938752A successfully refreshed from Google Patents.
US2938752A
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US
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Apparatus for conveying finely divided materials
Assignee: ATKINSON BULK TRANSP Co
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Filing: 1957-02-07
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Granted: 1960-05-31
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Expires: 1977-02-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Atkinson
- 👤 Albert L Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4608; B65G53/4625; B65G53/4633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1038806A
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US1777043A
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US2293871A
Cited
GB691126A
Cited
US2757049A
Cited
US2795464A
Cited
US2852315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |