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US2792641A
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US
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Apparatus for the treatment of granulated and fine materials
Assignee: Dunford & Elliott Process Engi
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Filing: 1955-07-13
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Granted: 1957-05-21
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Expires: 1975-07-13
Abstract
No abstract record available.
Inventors
- 👤 Heathcote Charles William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:08
CPC Classifications
F; F26; F26B; F26B11/00; F26B11/02; F26B11/04; F26B11/0445; F26B11/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US366672A
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US749340A
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US674309A
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US1064263A
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US1799649A
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US1768777A
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US1853691A
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FR727681A
Cited
US2020960A
Cited
US2212560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |