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Patent US3398829A successfully refreshed from Google Patents.
US3398829A
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US
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Apparatus for separating adulterants during pneumatic conveying
Assignee: EIDP Inc
•
Filing: 1967-02-17
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Granted: 1968-08-27
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Expires: 1987-02-17
Abstract
No abstract record available.
Inventors
- 👤 George N Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/01; B01; B01J; B01J8/00; B01J8/005; B01J8/0065; B65; B65G; B65G53/00; B65G53/34; B65G53/60
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |