US3728256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crossflow capillary dialyzer
Assignee: Kovalus Separation Solutions LLC
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Filing: 1971-06-22
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Granted: 1973-04-17
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Expires: 1991-06-22
Abstract
Abstract A CROSSFLOW CAPILLARY DIALYZER PARTICULARLY USEFUL FOR THE DIALYZATION OF BODY FLUIDS, SUCH AS BLOOD, WHICH DIALYZER IS CHARACTERIZED BY A SIMPLE AND ECONOMIC DESIGN WHICH PROMOTES THE VELOCITY OF DIALYZATE AS IT FLOWS PERPENDICULAR TO THE CAPILLARY FIBERS IN THE DIALYZER, AAND WHICH DIALYZER COMPRISES A PLURALITY OF GENERALLY PARALLEL CAPILLARY EMIPERMEABLE MEMBRANE FIBERS ENCLOSED AT BOTH ENDS IN POTTED HEADERS WITHIN A SHELL, AND WHEREIN A SYSTEM OF BAFFLES IS EMPLOYED WITHIN THE DIALYZER SHELL, WHICH BAFFLES PROVIDE A TORTUOUS OR ZIG-ZAG FLOW PATH FOR THE DIALYZATE AS IT CROSSFLOWS OVER THE CAPILARIES.
Inventors
- 👤 W Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:00
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/02; B01D63/04; B01D2313/00; B01D2313/08; B01D2313/086
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |