US3565258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parallel flow hemodialyzer
Assignee: United States Atomic Energy Commission
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Filing: 1969-06-06
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Granted: 1971-02-23
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Expires: 1989-06-06
Abstract
Abstract A hemodialyzer with semipermeable membrane tubes arranged in parallel. The tubes lead to dialysate manifolds at either ends of the tubes which are sealed from blood manifolds one on each side of the tubes by epoxy resin surrounding each cellophane tube. The tubes are closely packed with dialysate flowing through them and blood flowing around them. Tube supports within the tubes provide flow paths for both the dialysate and the blood while flaps on the outside of each tube prevent peel stress due to blood flow from destroying the epoxy bonds.
Inventors
- 👤 Ardis R Lavender
- 👤 Finley W Markley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:29
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/06; B01D63/069; B01D2313/00; B01D2313/04; B01D2313/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
The dialyzer of claim 1 wherein the tubes are sealed to each other with epoxy resin on the flaps at a point near the tube openings.
Claim 2
Dependent Claim
19 words
The dialyzer of claim 1 wherein the tubes are cellophane and have a wall thickness of about 1 mil.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |