US3880989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of antisera comprising fractionating plasma or serum with an ethylene oxide-polyoxypropylene block copolymer
Assignee: Baxter International Inc
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Filing: 1973-01-30
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Granted: 1975-04-29
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Expires: 1993-01-30
Abstract
Abstract A process for the preparation of a stable and concentrated antiserum comprising sequentially fractionating blood plasma or serum with block copolymers of ethylene oxide and polyoxypropylene polymer at selected concentrations and pH''s.
Inventors
- 👤 Luis A Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
A; A61; A61K; A61K35/00; A61K35/12; A61K35/14; A61K35/16; C; C07; C07K; C07K16/00; C07K16/06; Y; Y10; Y10S; Y10S436/00; Y10S436/825; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
A PROCESS FOR THE PREPARATION OF A STABLE AND CONCENTRATED ANTISERUM COMPRISING ADMIXING A. THE FINAL PRODUCT PREPARED FROM BLOOD PLASMA OR SERUM BY FRACTIONATION WITH A COMPOUND OF THE FOMULA
Claim 2
Dependent Claim
31 words
A PROCESS FOR THE PREPARATION OF A STABLE AND CONCENTRATED ANTISERUM COMPRISING ADMIXING A. THE FINAL PRODUCT PREPARED FROM BLOOD PLASMA OR SERUM BY FRACTIONATION WITH A COMPOUND OF THE FOMULA
Claim 3
Dependent Claim
42 words
A process for the preparation of a stable and concentrated antiserum according to claim 1 in which said compound contains about 80 percent of polyoxyethylene hydrophilic units in the molecule and the polyoxypropylene hydrophobic base has a molecular weight of about 950.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |