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Patent US2661356A successfully refreshed from Google Patents.
US2661356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of bile acids
Assignee: Armour and Co
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Filing: 1951-06-13
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Granted: 1953-12-01
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Expires: 1971-06-13
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sifferd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:15
CPC Classifications
C; C07; C07J; C07J9/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A PROCESS FOR SEPARATING DESOXYCHOLIC ACID FROM AN AQUEOUS ALKALINE SOLUTION OF CHOLIC AND DESOXYCHOLIC ACIDS IN WHICH A NON-POLAR VOLATILE ORGANIC SUBSTANCE IS ADDED TO FORM A COORDINATION COMPOUND WITH THE DESOXYCHOLIC ACID IN THE SOLUTION, THE STEPS OF ACIDIFYING THE MIXTURE UNTIL CRYSTALLIZATION OF THE DESOXYCHOLIC COORDINATION COMPOUND BEGINS, MAINTAING THE PH AGAINST FURTHER SUBSTANTIAL DROP UNTIL THE BULK OF THE DESOXYCHOLIC ACID CRYSTALLIZES, AND SEPARATING THE CRYSTALLIZED DESOXYCHOLIC ACID.
Claim 2
Dependent Claim
73 words
IN A PROCESS FOR SEPARATING DESOXYCHOLIC ACID FROM AN AQUEOUS ALKALINE SOLUTION OF CHOLIC AND DESOXYCHOLIC ACIDS IN WHICH A NON-POLAR VOLATILE ORGANIC SUBSTANCE IS ADDED TO FORM A COORDINATION COMPOUND WITH THE DESOXYCHOLIC ACID IN THE SOLUTION, THE STEPS OF ACIDIFYING THE MIXTURE UNTIL CRYSTALLIZATION OF THE DESOXYCHOLIC COORDINATION COMPOUND BEGINS, MAINTAING THE PH AGAINST FURTHER SUBSTANTIAL DROP UNTIL THE BULK OF THE DESOXYCHOLIC ACID CRYSTALLIZES, AND SEPARATING THE CRYSTALLIZED DESOXYCHOLIC ACID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |