US2595499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of vitamin b12
Assignee: Merck and Co Inc
•
Filing: 1948-07-10
•
Granted: 1952-05-06
•
Expires: 1968-07-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Wood
- 👤 Hendlin David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
C; C07; C07H; C07H23/00; A; A23; A23K; A23K20/00; C12; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/42; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/842; Y10S435/886; Y10S435/888; Y10S435/897
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR THE PRODUCTION OF VITAMIN B12 WHICH COMNPRISES FERMENTING, UNDER SUBMERGED, AERATED CONDITIONS, AN AQUEOUS NUTRIENT MEDIUM CONTAINING COBALT EQUIVALENT TO APPROXIMATELY FROM 0.1 TO 2 PARTS PER MILLION PARTS OF MEDIUM, WHEN ADDED AS COBALT NITRATE, BY MEANS OF A VITAMIN B12 PRODUCING STRAIN OF STREPTOMYCES GRISEUS.
Claim 2
Dependent Claim
50 words
A PROCESS FOR THE PRODUCTION OF VITAMIN B12 WHICH COMNPRISES FERMENTING, UNDER SUBMERGED, AERATED CONDITIONS, AN AQUEOUS NUTRIENT MEDIUM CONTAINING COBALT EQUIVALENT TO APPROXIMATELY FROM 0.1 TO 2 PARTS PER MILLION PARTS OF MEDIUM, WHEN ADDED AS COBALT NITRATE, BY MEANS OF A VITAMIN B12 PRODUCING STRAIN OF STREPTOMYCES GRISEUS.
References Cited (Backward Citations)
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US2368074A
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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) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |