Patent US3608729A successfully refreshed from Google Patents.
US3608729A
Expired / Lapsed
US
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Disposable dialyser pack with adsorbent
Assignee: NAT RES DEV
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Filing: 1968-09-27
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Granted: 1971-09-28
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Expires: 1988-09-27
Abstract
Abstract A self-contained pack for hemodialysis comprising a stack of rigid plastic sheets each formed with ridges and valleys and arranged in oppositely facing pairs, with pairs of flexible dialysis membranes interposed between the pairs of rigid sheets in the stack. The spaces between the paired membranes serve as blood flow passages, while the ridges of the rigid sheets provide support for the membranes. The spaces in the valleys between the ridges are packed with adsorbent material, e.g. an ion-exchange resin, immersed in nonflowing dialysis fluid.
Inventors
- 👤 Geoffrey Gordon Haselden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3679; B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/08; B01D63/082; B01D63/0821; Y; Y10; Y10S; Y10S210/00; Y10S210/929
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
22 words
A pack according to claim 1, wherein the solid adsorbent material provides further support for said membrane on said one side thereof.
Claim 2
Dependent Claim
18 words
A pack according to claim 1, wherein the plate is formed of synthetic plastic material by vacuum-molding technique.
Claim 3
Dependent Claim
69 words
A pack according to claim 1, comprising a succession of said plates arranged in a stack in oppositely facing pairs, with pairs of said membranes inserted between consecutive pairs of said plates, the stack being sealed around the edges of the plates and membranes in such manner as to prevent escape of said dialysis fluid and to confine flow of blood to the passages between said pairs of membranes.
Claim 4
Dependent Claim
24 words
A pack according to claim 4, wherein each said pair of membranes is provided by opposite walls of a flattened tube of membrance material.
Claim 5
Dependent Claim
13 words
A pack according to claim 1, wherein the adsorbent comprises an ion-exchange resin.
Claim 6
Dependent Claim
14 words
A pack according to claim 1, wherein the adsorbent includes at least one enzyme.
Claim 7
Dependent Claim
24 words
A pack according to claim 1, wherein at least one variable volume bag is connected to the chamber containing the adsorbent and dialysis fluid.
Claim 8
Dependent Claim
24 words
A pack according to claim 1, wherein a variable volume container filled with saline solution is in valved communication with said blood inlet connection.
Claim 9
Dependent Claim
16 words
A pack according to claim 1, including an air bubble rejector in said blood outlet connection.
Claim 10
Dependent Claim
15 words
A disposable portable pack according to claim 1, presterilized and sealed in an outer wrapping.
References Cited (Backward Citations)
US2502614A
Cited
US3397785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |