Patent US1483071A successfully refreshed from Google Patents.
Patent US2796383A successfully refreshed from Google Patents.
US2796383A
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Cobalamine analogs and process of preparing the same
Assignee: Merck and Co Inc
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Filing: 1955-07-08
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Granted: 1957-06-18
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Expires: 1975-07-08
Abstract
No abstract record available.
Inventors
- 👤 Franklin M Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:52
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; Y10S435/848; Y10S435/849
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
THE PROCESS WHICH COMPRISES INTIMATELY CONTACTING CELLS OF E. COLI 113-3 WITH FACTOR B AND 5-HYDROXYBENZIMIZOLE IN AN AQUEOUS MEDIUM TO PRODUCE THE 5(6)-HYDROXYBENZIMIDAZOLE ANALOG OF CYANO-COBALAMIN.
Claim 2
Dependent Claim
27 words
THE PROCESS WHICH COMPRISES INTIMATELY CONTACTING CELLS OF E. COLI 113-3 WITH FACTOR B AND 5-HYDROXYBENZIMIZOLE IN AN AQUEOUS MEDIUM TO PRODUCE THE 5(6)-HYDROXYBENZIMIDAZOLE ANALOG OF CYANO-COBALAMIN.
References Cited (Backward Citations)
US2595499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |