Patent US3020028A successfully refreshed from Google Patents.
US3020028A
Expired / Lapsed
US
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Apparatus for mixing a liquid with fine particles
Assignee: Individual
•
Filing: 1960-01-04
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Granted: 1962-02-06
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Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 Ellis W Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:13
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/50; B01F23/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |