Patent US3893991A successfully refreshed from Google Patents.
US3893991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarification of blood serum and plasma using block copolymers of ethylene oxide and polyoxypropylene
Assignee: Baxter International Inc
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Filing: 1974-04-01
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Granted: 1975-07-08
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Expires: 1994-04-01
Abstract
Abstract A method of clarifying blood serum and plasma to remove undesired proteinaceous and lipid particulate matter which comprises admixing the serum or plasma with from greater than about 20 to about 30% of block copolymers of ethylene oxide and polyoxypropylene polymer.
Inventors
- 👤 Lajos F Fekete
- 👤 Frans Peetoom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:59
CPC Classifications
A; A61; A61K; A61K35/00; A61K35/12; A61K35/14; A61K35/16; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
THE PROCESS IN WHICH A CLARIFIED PASMA FOR USE AS A THROMBOPLASTIN CONTROL IS OBTAINED FROM BLOOD PLASMA BY ADMIXING SAID BLOD PLASMA WITH A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
29 words
THE PROCESS IN WHICH A CLARIFIED PASMA FOR USE AS A THROMBOPLASTIN CONTROL IS OBTAINED FROM BLOOD PLASMA BY ADMIXING SAID BLOD PLASMA WITH A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
30 words
The process of claim 1 in which said compound contains about 80% of polyoxyethylene hydrophilic units in the molecule and the polyoxypropylene hydrophobic base has a molecular weight of 950.
References Cited (Backward Citations)
US2533004A
Cited
US2532348A
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US3395210A
Cited
US3522148A
Cited
US3450502A
Cited
US3839314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |