US3704223A
Expired / Lapsed
US
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Dialysis apparatus with capillary exchanger
Assignee: Dietzsch Hans Joachim GmbH
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Filing: 1969-06-06
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Granted: 1972-11-28
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Expires: 1989-06-06
Abstract
Abstract MEMBRANE CAPILLARY EXCHANGERS INCLUDING MULTIPLE COUNTERCURRENT EXCHANGERS AND THE PROCESS FOR MAKING AND USING THEM ARE DISCLOSED IN THE PRESENT APPLICATION. THE MEMBRANE CAPILLARY IS PRODUCED BY DEPOSITION ONTO AN AUXILIARY CORE FOLLOWED BY BUNDLING A PLURALITY OF THE CAPILLARIES, INTRODUCING A MEANS FOR HOLDING INTO THE ENDS OF THE CORES, CASTING AND HARDENING THE MEANS FOR HOLDING TO THE ENDS OF THE CAPILLARIES, REMOVING THE MOLD AND THEN REMOVING THE AUXILIARY CORES FROM THE INTERIOR OF THE MEMBRANES. THE EXCHANGER IS OPERABLE IN THE CHAMBER FOR DIALYSIS LIQUID TREATMENT.
Inventors
- 👤 Hans-Joachim Dietzsch
- 👤 Otto Dietzsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:03
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/06; F28F21/067; B; B01; B01D; B01D65/00; B01D65/08; B01D69/00; B01D69/08; B29; B29C; B29C31/00; B29C31/008; B29C33/00; B29C33/44; B29C33/52; B29C39/00; B29C39/02; B29C39/10; B29C41/00; B29C41/24; B29C65/00; B29C65/70; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/5346; B29C66/53465; B29C70/00; B29C70/68; B29C70/84; B29C70/845; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/043; F28D; F28D7/00; F28D7/10; F28D7/103; F28F21/062; B01D2321/00; B01D2321/08; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/14; B29L2031/18; B29L2031/60; B29L2031/601; F28D21/00; F28D2021/0019; F28D2021/005; F28F2260/00; F28F2260/02; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/131; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/4998
Claims Analysis
Total Claims: 0
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References 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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |