US2650896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanide ion in production of vitamin b12
Assignee: Merck and Co Inc
•
Filing: 1950-05-11
•
Granted: 1953-09-01
•
Expires: 1970-05-11
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Mcdaniel
- 👤 Harold R Woodruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
C; C07; C07H; C07H23/00; C12; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/42; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/829; Y10S435/886; Y10S435/896; Y10S435/897
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN THE PRODUCTION OF VITAMIN B12 AND VITAMIN B12-LIKE MATERIALS BY FERMENTATION OF A NUTRIENT MEDIUM WITH A VITAMIN B12 PRODUCING ORGANISM, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE FERMENTATION IN THE PRESENCE OF A SUBSTANCE FURNISHING A SOURCE OF CYANIDE ION IN AN AMOUNT WITHIN THE RANGE OF ABOUT 0.1 TO 100 PARTS PER MILLION.
Claim 2
Dependent Claim
55 words
IN THE PRODUCTION OF VITAMIN B12 AND VITAMIN B12-LIKE MATERIALS BY FERMENTATION OF A NUTRIENT MEDIUM WITH A VITAMIN B12 PRODUCING ORGANISM, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE FERMENTATION IN THE PRESENCE OF A SUBSTANCE FURNISHING A SOURCE OF CYANIDE ION IN AN AMOUNT WITHIN THE RANGE OF ABOUT 0.1 TO 100 PARTS PER MILLION.
References Cited (Backward Citations)
US1763112A
Cited
US2530416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |