US2770616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of proteinaceous materials in blood plasma and liver tissue
Assignee: Protein Foundation Inc
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Filing: 1951-01-29
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Granted: 1956-11-13
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Expires: 1971-01-29
Abstract
No abstract record available.
Inventors
- 👤 Rebekah R Cohn
- 👤 Charles A Coolidge
- 👤 Seligman Eustace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:45
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/76; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83; Y10S530/831; Y10S530/843; Y10S530/846
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD FOR THE QUANTITATIVE SEPARATION OF ALBUMIN FROM THE FIBRINOGEN AND GAMMA GLOBULIN CONTENT OF BLOOD PLASMA COMPRISING EQUILIBRATING THE PLASMA AT A TEMPERATURE NEAR THE FREEZING POINT OF THE PLASMA AT A PH OF 6.8 TO 7.4 AND AN IONIC STRENGTH OF APPROXIMATELY 0.15, IN THE PRESENCE OF A SUFFICIENT QUANTITY OF ZINC IONS TO PRECIPITATE THE FIBRINOGEN AND GAMMA GLOBULIN CONTENT OF THE PLASMA IN THE FORM OF INSOLUBLE ZINC COMPLEXES WHILE RETAINING THE SOLUBILITY OF THE ALBUMINS AND THEREAFTER SEPARATING THE SOLUBLE ALBUMINS FROM THE INSOLUBILIZED FIBRINIGEN AND GAMMA GLOBULIN ZINC COMPLEXES.
Claim 2
Independent Claim
96 words
A METHOD FOR THE QUANTITATIVE SEPARATION OF ALBUMIN FROM THE FIBRINOGEN AND GAMMA GLOBULIN CONTENT OF BLOOD PLASMA COMPRISING EQUILIBRATING THE PLASMA AT A TEMPERATURE NEAR THE FREEZING POINT OF THE PLASMA AT A PH OF 6.8 TO 7.4 AND AN IONIC STRENGTH OF APPROXIMATELY 0.15, IN THE PRESENCE OF A SUFFICIENT QUANTITY OF ZINC IONS TO PRECIPITATE THE FIBRINOGEN AND GAMMA GLOBULIN CONTENT OF THE PLASMA IN THE FORM OF INSOLUBLE ZINC COMPLEXES WHILE RETAINING THE SOLUBILITY OF THE ALBUMINS AND THEREAFTER SEPARATING THE SOLUBLE ALBUMINS FROM THE INSOLUBILIZED FIBRINIGEN AND GAMMA GLOBULIN ZINC COMPLEXES.
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |