US4379083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of blood plasma fractions
Assignee: Siemens Healthcare Diagnostics GmbH Germany
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Filing: 1981-05-14
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Granted: 1983-04-05
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Expires: 2001-05-14
Abstract
Abstract A precipitation process for the preparation of blood plasma constituents is disclosed, wherein the plasma to be fractionated and the precipitant are circulated in a closed system.
Inventors
- 👤 Jurgen Falke
- 👤 Helmut Geiger
- 👤 Wolfgang Grunbein
- 👤 Heinz-Georg Kandel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:23
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1868; B01J19/1881; A; A61; A61K; A61K35/00; A61K35/12; A61K35/14; A61K35/16; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
A process for the preparation of a plasma constituent which comprises separately and continuously feeding plasma, precipitant and buffer to a circulating pump for admixture in a zone of high turbulence and introduction to a loop reactor comprising said pump, a stirring vessel, a conduit extending from an outlet of the vessel to the pump, and a recirculating conduit extending from the pump to an inlet of the vessel for circulating the mixture to and from said vessel, and continuously withdrawing a portion of the reaction mixture from the loop reactor for separation of a precipitated plasma protein.
Claim 2
Dependent Claim
98 words
A process for the preparation of a plasma constituent which comprises separately and continuously feeding plasma, precipitant and buffer to a circulating pump for admixture in a zone of high turbulence and introduction to a loop reactor comprising said pump, a stirring vessel, a conduit extending from an outlet of the vessel to the pump, and a recirculating conduit extending from the pump to an inlet of the vessel for circulating the mixture to and from said vessel, and continuously withdrawing a portion of the reaction mixture from the loop reactor for separation of a precipitated plasma protein.
Claim 3
Dependent Claim
27 words
The process defined in claim 1 in which the reaction mixture is withdrawn from the loop reactor as it passes from the stirring vessel to the pump.
Claim 4
Dependent Claim
30 words
The process as claimed in claim 1, wherein the reaction mixture withdrawn from the loop reactor flows through a dwell zone prior to the separation of a precipitated plasma protein.
References Cited (Backward Citations)
US3764009A
Cited
US4066549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |