US3585131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleated memberane exchange device
Assignee: Becton Dickinson and Co
•
Filing: 1969-04-24
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Granted: 1971-06-15
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Expires: 1989-04-24
Abstract
Abstract D R A W I N G AN EXCHANGE APPARATUS EMPLOYED IN DESALINATION, ULTRAFILTRATION, IN THE TRANSFER OF HEAT, THE TRANSFER OF GAS FROM THE GAS PHASE TO THE LIQUID PHASE, OR THE TRANSFER OF GASES FROM THE GAS PHASE TO ANOTHER GAS PHASE ON THE OPPOSITE SIDES OF A PERMEABLE OR PERMSELECTIVE MEMBRANE OR TO THE TRANSFER OF WASTE PRODUCTS FROM BLOOD T A SUITABLE RINSING FLUID. THE EXCHANGE DEVICE IS FORMED OF A PLURALITY OF FLOW SHEETS OR PLATES WHICH ARE DISPOSED BETWEEN INTERMEDIATE PORTIONS OF A CONTINUOUS PLEATED MEMBRANE. THE FLOW PLATES HAVE FLOW FACILITATING MEANS FORMED THEREIN AND ARE REUSABLE WHILE THE MEMBRANE IS DISPOSABLE.
Inventors
- 👤 William G Esmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:23
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/14; B01D2313/00; B01D2313/08; Y; Y10; Y10S; Y10S159/00; Y10S159/27
Claims Analysis
Total Claims: 0
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |