US3880759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood dialyzer
Assignee: Biomerieux BV
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Filing: 1973-03-26
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Granted: 1975-04-29
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Expires: 1993-03-26
Abstract
Abstract A blood dialyzer has a housing enclosing a blood compartment and a compartment for dialysis fluid separated by a semi-permeable membrane, inlet and outlet to each compartment, a tube connected between the inlet and outlet of the latter compartment, means for circulating dialysis fluid through the compartment and the tube and means for removing fluid from the circuit and for adding fresh fluid. Air in the compartments may be purged therefrom with a water soluble gas.
Inventors
- 👤 Assendelft Leendert Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:18
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; B01D61/30; B01D63/00; B01D63/10; B01D63/101; B01D65/00; A61M1/1694
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
A DISPOSABLE BLOOD DIALYZER AND A DISPOSABLE SYSTEM FOR RECIRCULATING DIALYSIS FLUID THROUGH THE DIALYZER, SAID DIALYZER AND SYSTEM BEING ADAPTED TO BE PACKAGED, SAID DIALYZER COMPRISING A HOLLOW CORE MEMBER, A HOUSING ENCLOSING THE CORE MEMBER WITH A SPACE THEREBETWEEN, A SEMI-PERMEABLE MEMBRANE DISPOSED ABOUT THE CORE MEMBER AND DIVIDING THE SAID SPACE INTO A BLOOD COMPARTMENT AND A COMPARTMENT FOR DIALYSIS FLUID, AN INLET MEANS AND AN OUTLET MEANS FOR FLOW OF FLUID INTO AND OUT OF THE COMPARTMENT FOR DIALYSIS FLUID, A FIRST CONTINUOUS TUBE CONNECTING THE SAID INLET MEANS WITH THE SAID OUTLET MEANS EXTERNALLY OF THE HOUSING AND ADAPTED FOR COOPERATION WITH A TUBING PUMP TO RECIRCULATE DIALYSIS FLUID THROUGH THE COMPARTMENT FOR DIALYSIS FLUID, A SECOND TUBE CONNECTED TO THE FIRST TUBE AT SAID INLET FOR INTRODUCING FRESH DIALYSIS FLUID TO THE SYSTEM, A THIRD TUBE CONNECTED TO THE FIRST TUBE AT SAID OUTLET FOR REMOVING DIALYSIS FLUID FROM THE SYSTEM, MEANS FOR FLOW OF BLOOD INTO THE BLOOD COMPARTMENT AND MEANS FOR FLOW OF BLOOD FROM THE BLOOD COMPARTMENT.
Claim 2
Dependent Claim
176 words
A DISPOSABLE BLOOD DIALYZER AND A DISPOSABLE SYSTEM FOR RECIRCULATING DIALYSIS FLUID THROUGH THE DIALYZER, SAID DIALYZER AND SYSTEM BEING ADAPTED TO BE PACKAGED, SAID DIALYZER COMPRISING A HOLLOW CORE MEMBER, A HOUSING ENCLOSING THE CORE MEMBER WITH A SPACE THEREBETWEEN, A SEMI-PERMEABLE MEMBRANE DISPOSED ABOUT THE CORE MEMBER AND DIVIDING THE SAID SPACE INTO A BLOOD COMPARTMENT AND A COMPARTMENT FOR DIALYSIS FLUID, AN INLET MEANS AND AN OUTLET MEANS FOR FLOW OF FLUID INTO AND OUT OF THE COMPARTMENT FOR DIALYSIS FLUID, A FIRST CONTINUOUS TUBE CONNECTING THE SAID INLET MEANS WITH THE SAID OUTLET MEANS EXTERNALLY OF THE HOUSING AND ADAPTED FOR COOPERATION WITH A TUBING PUMP TO RECIRCULATE DIALYSIS FLUID THROUGH THE COMPARTMENT FOR DIALYSIS FLUID, A SECOND TUBE CONNECTED TO THE FIRST TUBE AT SAID INLET FOR INTRODUCING FRESH DIALYSIS FLUID TO THE SYSTEM, A THIRD TUBE CONNECTED TO THE FIRST TUBE AT SAID OUTLET FOR REMOVING DIALYSIS FLUID FROM THE SYSTEM, MEANS FOR FLOW OF BLOOD INTO THE BLOOD COMPARTMENT AND MEANS FOR FLOW OF BLOOD FROM THE BLOOD COMPARTMENT.
Claim 3
Dependent Claim
52 words
The dialyzer and recirculating system of claim 1 wherein said second and third tubes have free ends for connecting them to a source of fresh dialysis fluid and discharge of fluid from the system, respectively, and means for coupling the free ends together to facilitate packaging of the dialyzer and recirculating system.
Claim 4
Dependent Claim
14 words
The dialyzer of claim 1 wherein a constriction is provided in the said tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |