Patent US3414168A successfully refreshed from Google Patents.
US3414168A
Expired / Lapsed
US
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Apparatus for feeding particulate materials
Assignee: Individual
•
Filing: 1966-08-29
•
Granted: 1968-12-03
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Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 Hans A Eckhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:50
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/60; B01F27/72; B01F35/00; B01F35/71; B01F35/717; B01F35/7173; B01F35/71731; B01F35/71805; B01F35/75; B01F35/754; B01F35/75455
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |