US2810677A
Expired / Lapsed
US
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Recovery and purification of enzymes
Assignee: Corn Products Refining Co
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Filing: 1955-06-24
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Granted: 1957-10-22
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Expires: 1975-06-24
Abstract
No abstract record available.
Inventors
- 👤 John S Gilkison
- 👤 Earl R Kooi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:56
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2405; C12N9/2408; C12N9/2411; C12N9/2414; C12N9/2417; C12N9/10; C12N9/1048; C12N9/1051; C12N9/2451; C12N9/2454; C12Y; C12Y302/00; C12Y302/01; C12Y302/01001; C12Y302/01011; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/816
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS OF RECOVERING AN ENZYME SELECTED FROM THE GROUP CONSISTING OF DEXTRAN-DEXTRINASE, FUNGAL ALPHAAMYLASES AND BACTERIAL ALPHA-AMYLESS FROM SOLUTIONS THEREOF WHICH COMPRISES PRECIPITATING THE ENZYMES IN THE PRESENCE OF DEXTRAN, ADDINT TO THE SOLUTION ABOUT 25 PERCENT TO ABOUT 70 PERCENT BY VOLUME OF AN ORGANIC SOLVENT MISCIBLE WITH WATER TO THE EXTENT OF AT LEAST ABOUT 30 PERCENT, AND SEPARATING THE PRECIPITATED ENZYMES.
Claim 2
Dependent Claim
65 words
A PROCESS OF RECOVERING AN ENZYME SELECTED FROM THE GROUP CONSISTING OF DEXTRAN-DEXTRINASE, FUNGAL ALPHAAMYLASES AND BACTERIAL ALPHA-AMYLESS FROM SOLUTIONS THEREOF WHICH COMPRISES PRECIPITATING THE ENZYMES IN THE PRESENCE OF DEXTRAN, ADDINT TO THE SOLUTION ABOUT 25 PERCENT TO ABOUT 70 PERCENT BY VOLUME OF AN ORGANIC SOLVENT MISCIBLE WITH WATER TO THE EXTENT OF AT LEAST ABOUT 30 PERCENT, AND SEPARATING THE PRECIPITATED ENZYMES.
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |