Patent US3684705A successfully refreshed from Google Patents.
US3684705A
Expired / Lapsed
US
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Material eluting method and apparatus
Assignee: Individual
•
Filing: 1970-06-04
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Granted: 1972-08-15
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Expires: 1990-06-04
Abstract
Abstract MATERIALS ARE SEPARATED BY MEANS OF CARRIERS CONSISTING OF A POROUS MATERIALS HAVING CROSS-LINKED PORES BY ALLOWING THE CARRIERS TO PASS THROUGH A PLURALITY OF INTERFACES BETWEEN A PLURALITY OF LIQUIDS AND FALL THROUGH SAID PLURALITY OF THE LIQUIDS, AND SEPARATING THE MATERIAL PRESENT IN SAID LIQUIDS FROM THE CARRIERS OWING TO A DIFFERENCE IN FLOW RESISTANCE OF THE MATERIALS TO SAID CROSS-LINKED PORES.
Inventors
- 👤 Tetsuo Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:09
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; B; B01; B01D; B01D15/00; B01D15/02; B01D15/08; B01D15/10; B01D15/18; B01D15/1892
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |