US3892533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygenator gas distribution header
Assignee: Medtronic International Trading Inc
•
Filing: 1973-03-02
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Granted: 1975-07-01
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Expires: 1993-03-02
Abstract
Abstract A spool wound membrane oxygenator or artificial lung. The oxygenator includes a membrane envelope assembly wound around a core of a plastic spool with the principle of gas diffusion through a membrane being utilized. Each disk shaped end plate of the spool is provided with aperture means for blood carrying tubing and aperture means for gas carrying tubing. The oxygen and blood inlet and outlet means are so disposed as to provide a substantially countercurrent flow pattern of oxygen and blood through the mass transfer section of the oxygenator.
Inventors
- 👤 Frank B Freedman
- 👤 Keith A Ufford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:25
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/10; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
104 words
A BLOOD OXYGENATOR ASSEMBLY COMPRISING A SPOOL HAVING A CYLINDRICALLY SHAPED CORE WITH UPPER AND LOWER DISK SHAPED END PLATES AT OPPOSITE ENDS THEREOF, AN ELONGATED RECTANGULARALY SHAPED ENVELOPE MADE OF GAS PERMEABLE MEMBRANE SHEETS AND DEFINING AN ENCLOSED SPACE, INLET AND OUTLET TUBING MEANS ATACHED TO SAID ENVELOPE FOR CONVEYING GAS TO, FROM AND WITHIN SAID ENCLOSED SPACE SUBSTANTIALLY IN ONE DIRECTION, SAID ENVELOPE BEING SPIRALLY WOUND ON SAID CORE TO DEFINE A SECOND SPACE FOR THE FLOW OF BLOOD BETWEEN DJACENT TURNS OF SAID SPIRALLY WOUND ENVELOPE, SAID END PLATES EACH HAVING A PORT COMMUNICATING WITH SAID SECOND SPACE TO WHICH BLOOD
Claim 2
Dependent Claim
104 words
A BLOOD OXYGENATOR ASSEMBLY COMPRISING A SPOOL HAVING A CYLINDRICALLY SHAPED CORE WITH UPPER AND LOWER DISK SHAPED END PLATES AT OPPOSITE ENDS THEREOF, AN ELONGATED RECTANGULARALY SHAPED ENVELOPE MADE OF GAS PERMEABLE MEMBRANE SHEETS AND DEFINING AN ENCLOSED SPACE, INLET AND OUTLET TUBING MEANS ATACHED TO SAID ENVELOPE FOR CONVEYING GAS TO, FROM AND WITHIN SAID ENCLOSED SPACE SUBSTANTIALLY IN ONE DIRECTION, SAID ENVELOPE BEING SPIRALLY WOUND ON SAID CORE TO DEFINE A SECOND SPACE FOR THE FLOW OF BLOOD BETWEEN DJACENT TURNS OF SAID SPIRALLY WOUND ENVELOPE, SAID END PLATES EACH HAVING A PORT COMMUNICATING WITH SAID SECOND SPACE TO WHICH BLOOD
Claim 3
Dependent Claim
21 words
A blood oxygenator assembly according to claim 1 wherein the holes of each of said sets are in closely spaced relation.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |