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US3697418A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for regenerating the dialyzing fluid for an artificial kidney

Assignee: CCI Aerospace Corp
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Filing: 1971-01-25
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Granted: 1972-10-10
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Expires: 1991-01-25
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Abstract

Abstract THE METHOD AND APPARATUS FOR REMOVING THE WASTE METABOLITES FROM THE DIALYZING FLUID OF AN ARTIFICIAL KIDNEY WHEREIN THE TEMPERATURE OF THE DIALYZING FLUID IS LOWERED PRIOR TO THE FLUID ENTERING A FIRST CARBON SORBENT CHAMBER, THE CARBON ABSORBING THE WASTE METABOLITES, A PORTION OF THE FLUID LEAVING THE FIRST CHAMBER BEING RAISED IN TEMPERATURE AND MOVED INTO A SECOND CARBON SORBENT CHAMBER HAVING A HIGH PERCENTAGE OF ABSORBED WASTE METABOLITES, THE FLUID AFTER LEAVING THE SECOND SORBENT CHAMBER BEING LOWERED IN TEMPERATURE AND CAUSED TO COME INTO CONTACT WITH A THIRD SORBENT CHAMBER, A PORTION OF THE FLUID AFTER LEAVING THE THIRD SORBENT CHAMBER BEING RETURNED TO REENTER THE FIRST SORBENT CHAMBER.

Inventors

  • 👤 Allan M Johnson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 22:48
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1694; A61M1/1696

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-10-10 1976-04-10 1976-10-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-10-10 1980-04-10 1980-10-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-10-10 1984-04-10 1984-10-10 $7700.00 Window Closed / Lapsed

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