Patent US2716237A successfully refreshed from Google Patents.
US2716237A
Expired / Lapsed
US
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Production of endo-dextranase by aspergillus wenth
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1953-01-28
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Granted: 1955-08-23
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Expires: 1973-01-28
Abstract
No abstract record available.
Inventors
- 👤 Whiteside-Carlson Virginia
- 👤 Warner W Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:38
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2405; C12N9/2451; C12N9/2454; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/913; Y10S435/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF PRODUCING A DEXTRAN-ACCLIMATED ENDO-DEXTRANASE HAVING THE CAPACITY TO SPLIT THE GLUCOSIDIC LINKAGES OF DEXTRAN OF RELATIVELY HIGH MOLECULAR WEIGHT INITIALLY PREFERENTIALLY AT THE LINKAGES REMOVED FROM THE ENDS OF THE CHAINS AND WITHOUT ANY SUBSTANTIAL CLEVAGE OF DEPENDING GROUPS WHICH COMPRISES GROWING ASPERGILLUS WENTII IN A NUTRIENT MEDIUM CONSISTING ESSENTIALLY OF AN AQUEOUS COMPOSITION OF MATTER HAVING A CONTROLLED PH BETWEEN 7.0 AND 7.5 AND CONTAINING DISSOLVED METALLIC SALTS AND, PER LITER OF WATER FROM ABOUT 2.0 GMS. TO ABOUT 6.0 GMS. OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF AMINO ACIDS AND PROTEIN SOURCES OF AMINO ACIDS, AND FROM ABOUT 5.0 GMS. TO ABOUT 50.0 GMS. OF DEXTRAN, AND ISOLATING THE ENDO-DEXTRANASE FROM THE NUTRIENT MEDIUM.
Claim 2
Independent Claim
121 words
THE METHOD OF PRODUCING A DEXTRAN-ACCLIMATED ENDO-DEXTRANASE HAVING THE CAPACITY TO SPLIT THE GLUCOSIDIC LINKAGES OF DEXTRAN OF RELATIVELY HIGH MOLECULAR WEIGHT INITIALLY PREFERENTIALLY AT THE LINKAGES REMOVED FROM THE ENDS OF THE CHAINS AND WITHOUT ANY SUBSTANTIAL CLEVAGE OF DEPENDING GROUPS WHICH COMPRISES GROWING ASPERGILLUS WENTII IN A NUTRIENT MEDIUM CONSISTING ESSENTIALLY OF AN AQUEOUS COMPOSITION OF MATTER HAVING A CONTROLLED PH BETWEEN 7.0 AND 7.5 AND CONTAINING DISSOLVED METALLIC SALTS AND, PER LITER OF WATER FROM ABOUT 2.0 GMS. TO ABOUT 6.0 GMS. OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF AMINO ACIDS AND PROTEIN SOURCES OF AMINO ACIDS, AND FROM ABOUT 5.0 GMS. TO ABOUT 50.0 GMS. OF DEXTRAN, AND ISOLATING THE ENDO-DEXTRANASE FROM THE NUTRIENT MEDIUM.
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) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |