US2683682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential inactivation of enzymes
Assignee: Research Corp
•
Filing: 1950-02-06
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Granted: 1954-07-13
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Expires: 1970-02-06
Abstract
No abstract record available.
Inventors
- 👤 Byron S Miller
- 👤 John A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:44
CPC Classifications
C; C12; C12N; C12N9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR RECOVERING ACTIVE ALPHA-AMYLOLYTIC ENZYMES SUBSTANTIALLY FREE OF ACTIVE PROTEOLYTIC ENZYMES FROM MIXTURES OF THE TWO WHICH COMPRISES ADJUSTING THE PH OF AN AQUEOUS SOLUTION CONTAINING ACTIVE PROTEOLYTIC ENZYMES AND ACTIVE AMYLOLYTIC ENZYMES TO BETWEEN 7.5 AND 10.5 AND MAINTAINING SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 5* AND 60* C. FOR BETWEEN ABOUT 1/2 AND 20 HOURS, SAID TIME BEING SHORTER THE HIGHER THE TEMPERATURE AND SUFFICIENT TO SUBSTANTIALLY FREE THE SOLUTION OF ACTIVE PROTOLYTIC ENZYMES WHILE RETAINING A PREPONDERANCE OF THE ACTIVE ALPHA-AMYLOLYTIC ENZYMES PRESENT IN SAID AQUEOUS SOLUTION.
Claim 2
Dependent Claim
93 words
A PROCESS FOR RECOVERING ACTIVE ALPHA-AMYLOLYTIC ENZYMES SUBSTANTIALLY FREE OF ACTIVE PROTEOLYTIC ENZYMES FROM MIXTURES OF THE TWO WHICH COMPRISES ADJUSTING THE PH OF AN AQUEOUS SOLUTION CONTAINING ACTIVE PROTEOLYTIC ENZYMES AND ACTIVE AMYLOLYTIC ENZYMES TO BETWEEN 7.5 AND 10.5 AND MAINTAINING SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 5* AND 60* C. FOR BETWEEN ABOUT 1/2 AND 20 HOURS, SAID TIME BEING SHORTER THE HIGHER THE TEMPERATURE AND SUFFICIENT TO SUBSTANTIALLY FREE THE SOLUTION OF ACTIVE PROTOLYTIC ENZYMES WHILE RETAINING A PREPONDERANCE OF THE ACTIVE ALPHA-AMYLOLYTIC ENZYMES PRESENT IN SAID AQUEOUS SOLUTION.
References Cited (Backward Citations)
US1634310A
Cited
US2466172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |