US3591667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a cellulose hemodialysis membrane
Assignee: University of Utah
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Filing: 1970-03-16
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Granted: 1971-07-06
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Expires: 1990-03-16
Abstract
Abstract THE INVENTION DISCLOSED HEREIN RELATES TO A NOVEL METHOD FOR PRODUCING A RAGENERATED CELLULOSE HEMODIALYSIS MEMBRANE. THE CELLULOSE IS DISSOLVED IN A CUPRIETHYLENEDIAMINE HYDROXIDE SOLUTION AND THEN CAST INT A FILM AND SUITABLY TREATED TO PRODUCE A HEMODIALYSIS MEMBRANE OF IMPROVED PERMEABILITY AND ULTRAFILTRATION. CUENOPHANE IS THE NAME CHOSEN BY THE INVENTOR TO BE APPLIED TO THIS REGENERATED CELLULOSE MEMBRANE.
Inventors
- 👤 Virendra Kumar Kulshrestha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:44
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/08; B01D71/10; C; C08; C08L; C08L1/00; C08L1/02; C08L1/06
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |