Patent US3514579A successfully refreshed from Google Patents.
Patent US2738301A successfully refreshed from Google Patents.
US2738301A
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US
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Hydroxy analog of vitamin b12 and processes for preparing the same
Assignee: Merck and Co Inc
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Filing: 1950-07-20
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Granted: 1956-03-13
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Expires: 1970-07-20
Abstract
No abstract record available.
Inventors
- 👤 Edward A Kaczka
- 👤 Donald E Wolf
- 👤 Folkers Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:42
CPC Classifications
C; C07; C07H; C07H23/00; C12; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
THE HYDROXY ANALOG OF VITAMIN B12 WHEREIN THE CYANIDE GROUP OF THE VITAMIN B12 MOLECULE IS REPLACED BY A HYDROXY GROUP WHICH IS A RED CRYSTALLINE SUBSTANCE EFFECTIVE IN THE TREATMENT OF ANEMIAS SUBSTANTIALLY FREE FROM CYANIDE GROUPS CONTAINING THE ELEMENTS CARBON, HYDROGEN, NITROGEN, PHOSPHOROUS, COBALT AND OXYGEN, FURTHER CHARACTERIZED BY HAVING ULTRAVIOLET ABSORPTION MAXIMA AT ABOUT 273 MU, 351 MU, 525 MU, BEING SOLUBLE IN WATER, METHANOL AND ETHANOL, BEING INSOLUBLE IN ETHER, ACETONE, CHLOROFORM AND TOLUENE, BEING CONVERTIBLE INTO VITAMIN B12 BY REACTION WITH SOLUTIONS CONTAINING CYANIDE IONS, AND BY HAVING AN LLD ACTIVITY OF AT LEAST 6,600,000 UNITS PER MILLIGRAM.
References Cited (Backward Citations)
US1872775A
Cited
US2563794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |