US3972791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of proteins by electrical means
Assignee: Individual
•
Filing: 1974-05-06
•
Granted: 1976-08-03
•
Expires: 1994-05-06
Abstract
Abstract A process for the fractionation of liquid solutions of protein mixtures which includes the steps of subjecting such solutions to electrodialysis in the pH range 4.8 to 6, until desalting of the solution commences, said electrodialysis being conducted at temperatures below 15°C; and continuing said electrodialysis until the specific resistance of the mixture exceeds 1000 ohm-cm whereby a fraction of said protein mixture precipitates; and recovering the dialysate. Another aspect of the invention is an albumin concentrate for use in the preparation of plasma extenders, having at least 90% albumin, free from salts, euglobulins and euglobulin-like materials.
Inventors
- 👤 Harold Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:39
CPC Classifications
B; B01; B01D; B01D57/00; B01D57/02; B01D61/00; B01D61/42; B01D61/44; B01D2311/00; B01D2311/26; B01D2311/2642; G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; Y; Y02; Y02A; Y02A20/00; Y02A20/124
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |