US2742399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dextranase
Assignee: Individual
•
Filing: 1951-08-24
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Granted: 1956-04-17
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Expires: 1971-08-24
Abstract
No abstract record available.
Inventors
- 👤 Henry M Tsuchiya
- 👤 Allene R Jeanes
- 👤 Helen M Bricker
- 👤 Carl A Wilham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:56
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; Y10S435/933
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
METHOD COMPRISING CULTIVATING AN EXTRACELLULAR DEXTRANASE-PRODUCING STRAIN OF A MICROORGANISM OF THE GROUP CONSISTING OF PENICILLIUM LILACINUM NRRL 895, P. LILACINUM NRRL 1185, P. LILACINUM NRRL 1194, P. LILACINUM NRRL 1746, P. FUNICULOSUM NRRL 1033, P. FUNICULOSUM NRRL 1132, P. VERRUCULOSUM NRRL 2135, R. FUNICULOSUM NRRL 1032 A, P. FUNICULOSUM NRRL 1768, AND SPICARIA VIOLACEA NRRL 1691 IN A MEDIUM CONTAINING DETRAN AND A SOURCE OF ASSIMILABLE NITROGEN FOR 3 TO 6 DAYS AT A PH WITHIN THE RANGE 4.0 TO 9.0, AND SEPARATING THE CELLS FROM THE CULTURE MEDIUM, CONTACTING 15 TO 20% BY VOLUME OF THE RESULTING CELL-FREE CULTURE MEDIUM WITH A 2 TO 10% SOLUTION OF DEXTRAN AT PH 3.0 TO 6.5 AND AT A TEMPERATURE OF 30 TO 50* C. FOR A PERIOD OF 2 TO 6 HOURS, WHEREBY THE DEXTRANS IS HYDROLYZED, AND RECOVERING THE HYDROLYSIS PRODUCTS FROM THE SOLUTION.
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |