US2654690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzyl alcohol extraction of antipernicious anemia concentrate
Assignee: Merck and Co Inc
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Filing: 1951-06-22
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Granted: 1953-10-06
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Expires: 1971-06-22
Abstract
No abstract record available.
Inventors
- 👤 Frank R Koniuszy
- 👤 Norman G Brink
- 👤 Folkers Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:05
CPC Classifications
A; A61; A61K; A61K31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE PROCESS FOR PREPARING A CONCENTRATE HAVING ENHANCED ACTIVITY FOR TREATING PERNICIOUS ANEMIA AND FOR PROMOTING THE GROWTH OF LACTOBACILLUS LACTIS DORNER FROM A CRUDE CONCENTRATE OF BIOLOGICAL ORIGIN CONTAINING SAID ACTIVE MATERIAL, WHICH COMPRISES SUBJECTING AN AQUEOUS SOLUTION OF THE CRUDE MATERIAL CONTAINING THE ACTIVE MATERIAL TO EXTRACTION WITH BENZYL ALCOHOL, AND RECOVERING FROM THE RESULTING BENZYL ALCOHOL EXTRACT A PURIFIED CONCENTRATE OF ENHANCED ACTIVITY.
Claim 2
Dependent Claim
66 words
THE PROCESS FOR PREPARING A CONCENTRATE HAVING ENHANCED ACTIVITY FOR TREATING PERNICIOUS ANEMIA AND FOR PROMOTING THE GROWTH OF LACTOBACILLUS LACTIS DORNER FROM A CRUDE CONCENTRATE OF BIOLOGICAL ORIGIN CONTAINING SAID ACTIVE MATERIAL, WHICH COMPRISES SUBJECTING AN AQUEOUS SOLUTION OF THE CRUDE MATERIAL CONTAINING THE ACTIVE MATERIAL TO EXTRACTION WITH BENZYL ALCOHOL, AND RECOVERING FROM THE RESULTING BENZYL ALCOHOL EXTRACT A PURIFIED CONCENTRATE OF ENHANCED ACTIVITY.
References Cited (Backward Citations)
US2134256A
Cited
US2607717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |