Patent US3443748A successfully refreshed from Google Patents.
US3443748A
Expired / Lapsed
US
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Dynamic mixer and centrifuge combination for solvent extraction
Assignee: ROBERT W HOOPER
•
Filing: 1965-10-24
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Granted: 1969-05-13
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Robert W Hooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:22
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/06; Y; Y10; Y10S; Y10S494/00; Y10S494/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1595644A
Cited
US2234921A
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US2254455A
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US2646921A
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US2819014A
Cited
US3069074A
Cited
US3073517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |