US2687368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis of crude dextran fermentates
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1951-08-06
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Granted: 1954-08-24
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Expires: 1971-08-06
Abstract
No abstract record available.
Inventors
- 👤 George S Stoycos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
A; A23; A23B; A23B4/00; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021; C12; C12P; C12P19/00; C12P19/04; C12P19/08; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PROCESS FOR PRODUCING HYDROLYZED DEXTRAN DIRECTLY FROM NATIVE DEXTRAN AS CONTAINED IN A CRUDE FERMENTATE RESULTING FROM THE CULTIVATION OF BACTERIA SELECTED FROM THE GROUP CONSISTING OF LEUCONOSTOC MESENTEROIDES AND LEUCONOSTOC DEXTRANICUM IN A SUCROSE-CONTAINING MEDIUM, WHICH CONSISTS OF THE STEPS OF DILUTING THE FERMENTATE WITH WATER AND ACIDIFYING IT TO A NORMALITY OF BETWEEN 1 AND ABOUT 5, HEATING THE ACIDIFIED FERMENTATE AT A TEMPERATURE BETWEEN ABOUT 37 DEGREES C AND 85 DEGREES C, FOR BETWEEN ABOUT 35 MINUTES AND 60 HOURS, THE PH, TEMPERATURE AND HEATING TIME BEING CORRELATED SO THAT NO SUBSTANTIAL COLORATION DEVELOPS IN THE FERMENTATE DURING HEATING THEREOF, ADDING ALKALI TO THE FERMENTATE WHILE IT IS IN THE HEATED CONDITION TO ADJUST THE PH THEREOF TO ABOUT 6.8-7.0, COOLING THE RESULTING SOLUTION, DE-COLORIZING, DE-IONIZING AND CLARIFYING THE SAME, PRECIPITATING THE HYDROLYZED DEXTRAN DIRECTLY FROM THE COOLED CLARIFIED SOLUTION AND FILTERING OFF THE PRECIPITATED DEXTRAN.
Claim 2
Dependent Claim
150 words
A PROCESS FOR PRODUCING HYDROLYZED DEXTRAN DIRECTLY FROM NATIVE DEXTRAN AS CONTAINED IN A CRUDE FERMENTATE RESULTING FROM THE CULTIVATION OF BACTERIA SELECTED FROM THE GROUP CONSISTING OF LEUCONOSTOC MESENTEROIDES AND LEUCONOSTOC DEXTRANICUM IN A SUCROSE-CONTAINING MEDIUM, WHICH CONSISTS OF THE STEPS OF DILUTING THE FERMENTATE WITH WATER AND ACIDIFYING IT TO A NORMALITY OF BETWEEN 1 AND ABOUT 5, HEATING THE ACIDIFIED FERMENTATE AT A TEMPERATURE BETWEEN ABOUT 37 DEGREES C AND 85 DEGREES C, FOR BETWEEN ABOUT 35 MINUTES AND 60 HOURS, THE PH, TEMPERATURE AND HEATING TIME BEING CORRELATED SO THAT NO SUBSTANTIAL COLORATION DEVELOPS IN THE FERMENTATE DURING HEATING THEREOF, ADDING ALKALI TO THE FERMENTATE WHILE IT IS IN THE HEATED CONDITION TO ADJUST THE PH THEREOF TO ABOUT 6.8-7.0, COOLING THE RESULTING SOLUTION, DE-COLORIZING, DE-IONIZING AND CLARIFYING THE SAME, PRECIPITATING THE HYDROLYZED DEXTRAN DIRECTLY FROM THE COOLED CLARIFIED SOLUTION AND FILTERING OFF THE PRECIPITATED DEXTRAN.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |