US2703779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing stable watersoluble catalase of high potency
Assignee: Armour and Co
•
Filing: 1953-10-23
•
Granted: 1955-03-08
•
Expires: 1973-10-23
Abstract
No abstract record available.
Inventors
- 👤 August L Lolli
- 👤 Edward F Cavanaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/0004; C12N9/0065; C12N9/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A METHOD OF PREPARING A STABLE WATER-SOLUBLE AMORPHOUS CATALASE OF HIGH POTENCY, THE STEPS OF EXTRACTING CATALASE-BEARING TISSUE WITH AQUEOUS ACETONE HAVING AN ACETONE CONCENTRATION RANGING BETWEEN 20 TO 30% BY VOLUME TO OBTAIN AN EXTRACT OF CATALASE WHILE RETARDING THE SOLUBILIZATION OF WATER-SOLUBLE CONTAMINANTS, INCREASING THE ACETONE CONCENTRATION IN THE EXTRACT TO ABOVE 30% BUT BELOW 40% BY VOLUME TO PRECIPITATE WATER-SOLUBLE CONTAMINANTS WHICH WERE SOLUBILIZED DURING THE EXTRACTION, SEPARATING THE EXTRACT FROM THE UNDISSOLVED MATERIAL, THEN FURTHER INCREASING THE ACETONE CONCENTRATION OF THE EXTRACT TO BETWEEN 45 AND 55% BY VOLUME TO PRECIPITATE THE CATALASE TOGETHER WITH WATER-INSOLUBLE CONTAMINANTS, SEPARATING THE PRECIPITATE THUS FORMED FROM THE SUPERNATANT SOLUTION, AND EXTRACTING THIS PRECIPITATE WITH WATER TO SELECTIVELY SOLUBILIZE THE CATALASE.
Claim 2
Dependent Claim
122 words
IN A METHOD OF PREPARING A STABLE WATER-SOLUBLE AMORPHOUS CATALASE OF HIGH POTENCY, THE STEPS OF EXTRACTING CATALASE-BEARING TISSUE WITH AQUEOUS ACETONE HAVING AN ACETONE CONCENTRATION RANGING BETWEEN 20 TO 30% BY VOLUME TO OBTAIN AN EXTRACT OF CATALASE WHILE RETARDING THE SOLUBILIZATION OF WATER-SOLUBLE CONTAMINANTS, INCREASING THE ACETONE CONCENTRATION IN THE EXTRACT TO ABOVE 30% BUT BELOW 40% BY VOLUME TO PRECIPITATE WATER-SOLUBLE CONTAMINANTS WHICH WERE SOLUBILIZED DURING THE EXTRACTION, SEPARATING THE EXTRACT FROM THE UNDISSOLVED MATERIAL, THEN FURTHER INCREASING THE ACETONE CONCENTRATION OF THE EXTRACT TO BETWEEN 45 AND 55% BY VOLUME TO PRECIPITATE THE CATALASE TOGETHER WITH WATER-INSOLUBLE CONTAMINANTS, SEPARATING THE PRECIPITATE THUS FORMED FROM THE SUPERNATANT SOLUTION, AND EXTRACTING THIS PRECIPITATE WITH WATER TO SELECTIVELY SOLUBILIZE THE CATALASE.
References Cited (Backward Citations)
US2635069A
Cited
US2614062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |