US3702805A
Expired / Lapsed
US
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Process for the production of a dextran-degrading enzyme
Assignee: Sankyo Co Ltd
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Filing: 1971-12-15
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Granted: 1972-11-14
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Expires: 1991-12-15
Abstract
Abstract AN IMPROVED PROCESS FOR THE PRODUCTION OF DEXTRANASE WHICH COMPRISES CULTURING A DEXTRANASE-PRODUCING MICROORGANISM SELECTED FROM THE GENERA CHAETOMIUM, HUMICOLA, SPOROTRICHUM, ANIXIELLA, MACROSPORIUM, STREPTOMYCES, GIBBERELLA, GLOESOPORIUM AND GLOMERELLA, PARTICULARLY CHAETOMIUM SPIRALE, CHAETOMIUM GRACILE, SPOROTRICHUM ASTEROIDES, OR GIBBERALLA FUJIKUORI IN A FERMENTATION MEDIUM AND RECOVERING FROM SAID MEDIUM THE DEXTRANASE WHICH ACCUMULATES THEREIN. DEXTRANASE ITSELF IS KNOWN TO BE USEFUL, FOR EXAMPLE AS ENZYMETIC PREPARATIONS FOR PREVENTION OF TOOTH DECAY OR SCALE DEPOSIT.
Inventors
- 👤 Keijiro Ishibashi
- 👤 Tokio Okaniwa
- 👤 Atsushi Hattori
- 👤 Masetoshi Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:07
CPC Classifications
C; C12; C12N; C12N9/00; C12N9/14; C12N9/24; C12N9/2402; C12N9/2405; C12N9/2451; C12N9/2454; Y; Y10; Y10S; Y10S435/00; Y10S435/814; Y10S435/816; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/911
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |