Patent US2326287A successfully refreshed from Google Patents.
US2547429A
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Isolation of enzymes from aqueous solutions with lignin and gelatin and product obtained thereby
Assignee: Wallerstein Co Inc
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Filing: 1945-10-26
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Granted: 1951-04-03
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Expires: 1965-10-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph T Alba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2405; C12N9/2408; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/815; Y10S435/8215; Y10S435/911; Y10S435/913; Y10S435/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF SEPARATING FROM AQUEOUS SOLUTION AN ENZYME ACTIVE OF PH VALUES OF 5 AND ABOVE WITHOUT INACTIVATION THEREOF, WHICH COMPRISES PRECIPITATING THE ENZYME BY MEANS OF A WATER-SOLUBLE ALKALI-COOK LIGNIN AND GELATIN FROM AN AQUEOUS SOLUTION OF THE ENZYME UNDER ACID CONDITIONS BUT AT A PH VALUE NOT SUBSTANTIALLY BELOW 4 SO AS TO FORM A COMPLEX INSOLUBLE UNDER SUCH ACID CONDITIONS, BUT SOLUBLE AT HIGHER PH VALUES.
Claim 2
Independent Claim
70 words
THE METHOD OF SEPARATING FROM AQUEOUS SOLUTION AN ENZYME ACTIVE OF PH VALUES OF 5 AND ABOVE WITHOUT INACTIVATION THEREOF, WHICH COMPRISES PRECIPITATING THE ENZYME BY MEANS OF A WATER-SOLUBLE ALKALI-COOK LIGNIN AND GELATIN FROM AN AQUEOUS SOLUTION OF THE ENZYME UNDER ACID CONDITIONS BUT AT A PH VALUE NOT SUBSTANTIALLY BELOW 4 SO AS TO FORM A COMPLEX INSOLUBLE UNDER SUCH ACID CONDITIONS, BUT SOLUBLE AT HIGHER PH VALUES.
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) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |