US2643213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of vitamin b12 by streptomyces olivaceus
Assignee: United States Department of Agriculture
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Filing: 1951-03-23
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Granted: 1953-06-23
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Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
- 👤 Harlow H Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:02
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/42; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
METHOD COMPRISING CULTIVATING STREPTOMYCES OLIVACEUS IN AN AQUEOUS NUTRIENT MEDIUMCOMPRISING AN ASSIMILABLE FEREMENTABLE CARBOHYDRATE SURFACE, AN ASSIMILABLE NITROGEN SOURCE, AND A SOURCE OF COBALT ION, INCUBATING THE CULTURE UNDER SUBMERGED AEROBIC CONDITIONS,THE INITIAL PH OF THE FERMENTATION BEING AT NO LOWER THAN ABOUT PH 6.5, THE TEMPERATURE IN THE RANGE 25* TO 30* C., TO PRODUCE VITAMIN B12.
Claim 2
Dependent Claim
58 words
METHOD COMPRISING CULTIVATING STREPTOMYCES OLIVACEUS IN AN AQUEOUS NUTRIENT MEDIUMCOMPRISING AN ASSIMILABLE FEREMENTABLE CARBOHYDRATE SURFACE, AN ASSIMILABLE NITROGEN SOURCE, AND A SOURCE OF COBALT ION, INCUBATING THE CULTURE UNDER SUBMERGED AEROBIC CONDITIONS,THE INITIAL PH OF THE FERMENTATION BEING AT NO LOWER THAN ABOUT PH 6.5, THE TEMPERATURE IN THE RANGE 25* TO 30* C., TO PRODUCE VITAMIN B12.
References Cited (Backward Citations)
US2595499A
Cited
US2530416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |