US2999791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing mixture of ptc, proconvertin and prothrombin
Assignee: Bayer Corp
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Filing: 1957-08-06
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Granted: 1961-09-12
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Expires: 1977-08-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Fowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:40
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/48; C12N9/50; C12N9/64; C12N9/6421; C12N9/6424; C12N9/6429; C12Y; C12Y304/00; C12Y304/21; C12Y304/21005; A; A61; A61K; A61K38/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF COLLECTIVELY RECOVERING THE PROTEINS: PLASMA THROMBOPLASTIN COMPONENT, PROCONVERTIN, AND PROTHROMBIN FROM NON-CITRATED HUMAN PLASMA, COMPRISING: MIXING SAID PLASMA WITH AN INSOLUBLE BARIUM SALT, SEPARATING SAID ADSORBING AGENT AND ITS ADSORBED PROTEINS FROM THE PLASMA, ELUTING THE ADSORBED PROTEINS FROM SAID ADSORBING AGENT WITH A SODIUM CITRATE SOLUTION , ADJUSTING THE PH OF THE SOLUTION TO A PH WITHIN THE RANGE OF 3.0 TO 4.5, PRECIPITATING THE PROTEINS WITH ETHANOL, AND COLLECTING THE RESULTING PRECIPITATE.
Claim 2
Independent Claim
77 words
THE METHOD OF COLLECTIVELY RECOVERING THE PROTEINS: PLASMA THROMBOPLASTIN COMPONENT, PROCONVERTIN, AND PROTHROMBIN FROM NON-CITRATED HUMAN PLASMA, COMPRISING: MIXING SAID PLASMA WITH AN INSOLUBLE BARIUM SALT, SEPARATING SAID ADSORBING AGENT AND ITS ADSORBED PROTEINS FROM THE PLASMA, ELUTING THE ADSORBED PROTEINS FROM SAID ADSORBING AGENT WITH A SODIUM CITRATE SOLUTION , ADJUSTING THE PH OF THE SOLUTION TO A PH WITHIN THE RANGE OF 3.0 TO 4.5, PRECIPITATING THE PROTEINS WITH ETHANOL, AND COLLECTING THE RESULTING PRECIPITATE.
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |