US3631986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialyzer
Assignee: Rhone Poulenc SA
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Filing: 1969-12-16
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Granted: 1972-01-04
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Expires: 1989-12-16
Abstract
Abstract A dialyzer e.g., to act as an artificial kidney in which plates are stacked in pairs between supports, and have interposed pairs of semipermeable 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
- 👤 Andre Sausse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:59
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: 2
Claim 1
Independent Claim
275 words
A dialyzer comprising, in combination: a. a plurality of pairs of plates stacked in overlying relation to one another, each of said plates being substantially rectangular and symmetrical, and comprising a front face and a backface with the front faces of a pair of plates being in facing relation; b. a pair of semipermeable membranes between the front faces of each pair of plates, whereby each membrane has a plate adjacent thereto; c. means defining a first exchange zone between each membrane and its adjacent plate; d. means defining a second exchange zone between the two membranes of a pair; e. means to feed a first liquid to and from the first exchange zone; f. means to feed a second liquid to and from the second exchange zone; g. at least one flexible-walled chamber exerting a uniform controlled pressure on at least a portion of said plates; h. a plurality of longitudinal, parallel grooves separated by a plurality for longitudinal parallel ribs defined on said front faces, the ribs of a pair of plates being in register with one another; i. a depression on the backface of each plate of substantially constant cross section; j. diagonally opposite ducts to feed said first liquid to and from said first exchange zone, said ducts being defined between the backfaces of the plates of adjacent pairs and communicating with said depression; k. apertures defined in said plates and communicating said grooves with said depression; l. recesses on the front face of said plates communicating with said grooves; and m. diagonally opposite passages, complementary to said ducts, to feed said second liquid to and from said second exchange zone.
Claim 2
Dependent Claim
275 words
A dialyzer comprising, in combination: a. a plurality of pairs of plates stacked in overlying relation to one another, each of said plates being substantially rectangular and symmetrical, and comprising a front face and a backface with the front faces of a pair of plates being in facing relation; b. a pair of semipermeable membranes between the front faces of each pair of plates, whereby each membrane has a plate adjacent thereto; c. means defining a first exchange zone between each membrane and its adjacent plate; d. means defining a second exchange zone between the two membranes of a pair; e. means to feed a first liquid to and from the first exchange zone; f. means to feed a second liquid to and from the second exchange zone; g. at least one flexible-walled chamber exerting a uniform controlled pressure on at least a portion of said plates; h. a plurality of longitudinal, parallel grooves separated by a plurality for longitudinal parallel ribs defined on said front faces, the ribs of a pair of plates being in register with one another; i. a depression on the backface of each plate of substantially constant cross section; j. diagonally opposite ducts to feed said first liquid to and from said first exchange zone, said ducts being defined between the backfaces of the plates of adjacent pairs and communicating with said depression; k. apertures defined in said plates and communicating said grooves with said depression; l. recesses on the front face of said plates communicating with said grooves; and m. diagonally opposite passages, complementary to said ducts, to feed said second liquid to and from said second exchange zone.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |