Patent US3743097A successfully refreshed from Google Patents.
US3743097A
Expired / Lapsed
US
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Dialyzer
Assignee: Rhone Poulenc SA
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Filing: 1971-05-24
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Granted: 1973-07-03
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Expires: 1991-05-24
Abstract
Abstract A dialyzer, e.g., to act as an artificial kidney in which rigid or semi-rigid plates are stacked in pairs between supports, and have interposed pairs of semi-permeable membranes. First exchange zones are formed between the membranes and their adjacent plates which are provided with parallel ribs and grooves, and second exchange zones are formed between the membranes of a pair. In order to exert a constant pressure, a flexible-walled bag is located between the outermost plates and a support, over the projected area of the exchange zones.
Inventors
- 👤 A Sausse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:20
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/08; B01D63/082; B01D2313/00; B01D2313/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
144 words
In a dialyzer comprising at least one pair of rigid or semi rigid plates stacked in overlying relation to one another, a pair of semipermeable membranes between each pair of plates, whereby each membrane has a plate adjacent thereto, mean defining a first exchange zone between each membrane and its adjacent plate, means defining a second exchange zone between the two membranes of a pair, means to feed a first liquid to and from the first exchange zone, means to feed a second liquid to and from the second exchange zone and at least one flexible-walled chamber exerting a uniform controlled pressure on at least a portion of said plates, the improvement consisting in that said plates are flat and thin, the means for feeding liquid to and from the exchange zones being constituted by superimposed depressions formed in the thickness of said plates.
Claim 2
Dependent Claim
144 words
In a dialyzer comprising at least one pair of rigid or semi rigid plates stacked in overlying relation to one another, a pair of semipermeable membranes between each pair of plates, whereby each membrane has a plate adjacent thereto, mean defining a first exchange zone between each membrane and its adjacent plate, means defining a second exchange zone between the two membranes of a pair, means to feed a first liquid to and from the first exchange zone, means to feed a second liquid to and from the second exchange zone and at least one flexible-walled chamber exerting a uniform controlled pressure on at least a portion of said plates, the improvement consisting in that said plates are flat and thin, the means for feeding liquid to and from the exchange zones being constituted by superimposed depressions formed in the thickness of said plates.
Claim 3
Dependent Claim
15 words
A dialyzer as claimed in claim 1, wherein said flexible-walled chamber is filled with water.
Claim 4
Dependent Claim
126 words
A dialyzer as claimed in claim 1, comprising a plurality of pairs of plates and pairs of membranes, defining a plurality of first and second exchange zones, and further comprising first internal headers connected to said first exchange zones, second internal headers connected to said second exchange zones, external headers outside said plates and unions individually connecting said internal and external headers, said first and second internal headers being provided by recesses in said plates, and each of said unions being in one piece and having a flattened portion adjacent an end thereof fitting in said recesses and increasing in width towards said end, and a flange on each of said unions positioned to bear on said plates thereby to retain said unions with said plates.
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |