US2703302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitamin b12-active composition and process of preparing same
Assignee: Merck and Co Inc
•
Filing: 1952-12-08
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Granted: 1955-03-01
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Expires: 1972-12-08
Abstract
No abstract record available.
Inventors
- 👤 Edward L Rickes
- 👤 Thomas R Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/42; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/829; Y10S435/867; Y10S435/869; Y10S435/874; Y10S435/875; Y10S435/876; Y10S435/886; Y10S435/897; Y10S435/911
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
A VITAMINE B12-ACTIVE COMPOSITION COMPRISING RECOVERED ELABORATION PRODUCTS OF THE FERMENTATION OF A VITAMIN B12-ACTIVITY PRODUCING STRAIN OF FUNGI SELECTED FROM THE CLASS CONSISTING OF SCHIZOMYCETES, TORULA, AND EREMOTHECIUM, THE L.L.D. ACTIVITY OF SAID COMPOSITION BEING AT LEAST 440 L.L.D. UNITS PER MILLIGRAM AND LESS THAN 11 MILLION L.L.D. UNITS PER MILLIGRAM.
Claim 2
Dependent Claim
52 words
A VITAMINE B12-ACTIVE COMPOSITION COMPRISING RECOVERED ELABORATION PRODUCTS OF THE FERMENTATION OF A VITAMIN B12-ACTIVITY PRODUCING STRAIN OF FUNGI SELECTED FROM THE CLASS CONSISTING OF SCHIZOMYCETES, TORULA, AND EREMOTHECIUM, THE L.L.D. ACTIVITY OF SAID COMPOSITION BEING AT LEAST 440 L.L.D. UNITS PER MILLIGRAM AND LESS THAN 11 MILLION L.L.D. UNITS PER MILLIGRAM.
Claim 3
Dependent Claim
63 words
A PROCESS FOR THE PRODUCTION OF AN L.L.D.ACTIVE COMPOSITION WHICH COMPRISES FERMENTING AN AQUEOUS NUTRIENT MEDIUM UNDER SUBMERGED AERATED CONDITIONS BY MEANS OF AN L.L.D.-ACTIVITY PRODUCING STRAIN OF FUNGI SELECTED FROM THE CLASS CONSISTING OF SCHIZOMYCETES, TORULA, AND EREMOTHECIUM, EXTRACTING L.L.D.-ACTIVE SUBSTANCES THEREFROM, AND RECOVERING FROM THE RESULTING EXTRACT AN L.L.D.-ACTIVE COMPOSITION HAVING AN L.L.D. ACTIVITY OF AT LEAST 440 UNITS PER MILLIGRAM.
Claim 4
Dependent Claim
63 words
A PROCESS FOR THE PRODUCTION OF AN L.L.D.ACTIVE COMPOSITION WHICH COMPRISES FERMENTING AN AQUEOUS NUTRIENT MEDIUM UNDER SUBMERGED AERATED CONDITIONS BY MEANS OF AN L.L.D.-ACTIVITY PRODUCING STRAIN OF FUNGI SELECTED FROM THE CLASS CONSISTING OF SCHIZOMYCETES, TORULA, AND EREMOTHECIUM, EXTRACTING L.L.D.-ACTIVE SUBSTANCES THEREFROM, AND RECOVERING FROM THE RESULTING EXTRACT AN L.L.D.-ACTIVE COMPOSITION HAVING AN L.L.D. ACTIVITY OF AT LEAST 440 UNITS PER MILLIGRAM.
References Cited (Backward Citations)
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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) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |