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Patent US3598727A successfully refreshed from Google Patents.
US3598727A
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US
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Artificial kidney
Assignee: Althin Medical Inc
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Filing: 1969-04-07
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Granted: 1971-08-10
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Expires: 1989-04-07
Abstract
Abstract IN AN ARTIFICIAL KIDNEY, A DIALYSATE CONCENTRATE LIQUID AND HEATED TAP WATER ARE FED SEPARATELY BY PUMPS IN FIXED PROPORTIONS TO A MIXING VENTURI WHERE THE WATER AND LIQUID ARE COMBINED TO FORM A DIALYSATE SOLUTION. IN ORDER TO REMOVE FROM THE DIALYSATE SOLUTION A DESIRED PORTION OF AIR WHICH HAS BEEN INTRODUCED THEREIN FROM THE WATER, THE HEATED WATER IS PASSED THROUGH A POSITIVE DISPLACEMENT PUMP HAVING A RESTRICTED ORIFICE BYPASS LINE BEFORE IT ARRIVES AT THE MIXING VENTURI. THIS CAUSES CONSOLIDATION OF THE AIR FROM SMALL TO LARGE BUBBLES WHICH ARE REMOVED BY A BUBBLE TRAP. THE RESULTING DEARATED SOLUTION IS THEN ADVANCED THROUGH A HEADER TO BRANCH LINES TO DIALYZERS.
Inventors
- 👤 Charles B Willock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:07
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1654; A61M1/1656; A61M1/1658; A61M1/166; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2516
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |