Dialysers and spacer frames therefor
Abstract
Abstract A spacer frame for a dialyser and a dialyser including such a frame formed thin sheets of resilent material. The spacer frames are made up of at least two thin laminal elements having four duct forming orifices therein, and a central cell forming orifice. Extension portions are provided for two of the duct forming orifices in one of a laminal element and extension parts are provided for the cell forming of the other laminal element, the extension parts and portions overlying to provide a communications between the two duct forming orifices and the cell, no one laminal element having a channel extending from a duct forming orifice to a cell forming orifice, thus reducing leakage and pressure loss.
Inventors
- 👤 Jean Laforest
- 👤 Pierre Miton
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |