Patent US2762749A successfully refreshed from Google Patents.
US2762749A
Expired / Lapsed
US
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Production of lactase
Assignee: NAT DAIRY RES LAB Inc
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Filing: 1951-05-02
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Granted: 1956-09-11
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Expires: 1971-05-02
Abstract
No abstract record available.
Inventors
- 👤 Myers Robert Page
- 👤 Edwin G Stimpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:01
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/78; C12N9/86; C12N9/24; C12N9/2402; C12N9/2468; C12N9/2471; C12Y; C12Y302/00; C12Y302/01; C12Y302/01023; C12Y305/00; C12Y305/02; C12Y305/02006; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/921; Y10S435/94; Y10S435/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS OF PRODUCING A LACTASE-ACTIVE YEAST ENZYME PREPARATION WHICH COMPRISES PROPAGATING YEAST OF A LACTASE-PRODUCING STRAIN UNDER GROWTH-FAVORING CONDITIONS AT A TEMPERATURE WITHIN THE RANGE FROM 80-100* F, IN A NUTRIENT MEDIUM COMPRISING A DEPROTEINATED WHEY IN WHICH LACTOSE IS THE CHIEF SOURCE OF CARBOHYDRATE AND HAVING A PH WITHIN THE RANGE FROM 3.5 TO 7.5, HARVESTING YEAST FROM THE MEDIUM AND THEN DRYING THE HARVESTED YEAST TO OBTAIN A LACTASE-ACTIVE YEAST ENZYME PRODUCT.
Claim 2
Dependent Claim
75 words
A PROCESS OF PRODUCING A LACTASE-ACTIVE YEAST ENZYME PREPARATION WHICH COMPRISES PROPAGATING YEAST OF A LACTASE-PRODUCING STRAIN UNDER GROWTH-FAVORING CONDITIONS AT A TEMPERATURE WITHIN THE RANGE FROM 80-100* F, IN A NUTRIENT MEDIUM COMPRISING A DEPROTEINATED WHEY IN WHICH LACTOSE IS THE CHIEF SOURCE OF CARBOHYDRATE AND HAVING A PH WITHIN THE RANGE FROM 3.5 TO 7.5, HARVESTING YEAST FROM THE MEDIUM AND THEN DRYING THE HARVESTED YEAST TO OBTAIN A LACTASE-ACTIVE YEAST ENZYME PRODUCT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |