US3615024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High flow membrane
Assignee: Amicon Corp
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Filing: 1968-08-26
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Granted: 1971-10-26
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Expires: 1988-08-26
Abstract
Abstract AN ANISTROPIC HIGH FLUX LOW PRESSURE POLYMERIC MEMBRANE CAPABLE OF BEING DRIED WITHOUT LOSS OF BENEFICIAL MECHANICAL AND PROCESSING CHARACTERISTICS, AND HAVING IN A CONTINUOUS POLYMER PHASE A BARRIER LAYER CONTAINING PORES FROM 1 TO 1000 MILLIMICRONS IN DIAMETER AND AN OPEN POROUS SUPPORT LAYER, THE POLYMER ABSORBING LESS THAN 10 PERCENT MOISTURE AT 100 PERCENT RELATIVE HUMIDITY AT 25*C.
Inventors
- 👤 Alan S Michaels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:30
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/76; B01D67/00; B01D67/0002; B01D67/0009; B01D69/00; B01D69/02; B01D2325/00; B01D2325/04; B01D2325/22
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |