US3157584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of frangulin
Assignee: Droit et Pharmacie
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Filing: 1961-04-13
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Granted: 1964-11-17
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Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Pouchet Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:31
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/24; C07H15/244; Y; Y10; Y10S; Y10S435/00; Y10S435/803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR THE PREPARATION OF 1,3,8-TRIHYDOXY-6METHYLANTHRAQUINONE-1-RHAMNOSIDE BY SELECTIVE EXTRACTION OF RHAMNACEAE WHICH COMPRISES SUBJECTING SAID RHAMNACEAE TO ENZYMATIC AUTOHYDROLYSIS IN THE PRESENCE OF WATER AND AN ACIDIFY-NEUTRALIZING, INSOLUBLE NON-TOXIC CARBONATE ADDED IN A PROPORTION OF ABOUT 10% BY WEIGHT OF THE RHAMNACEAE, FILTERING THE RESULTING MIXTURES TO RECOVER A SOLID RESIDUE, WASHING SAID RESIDUE WITH COLD WATER AND RINSING SAID COLD WATER-WASHED RESIDUE WITH COLD WATER AND RINSING SAID COLD WATER-WASHED RESIDUE WITH BOILING WATER, DRYING THE RESULTANT WASHED RESIDUAL MATERIAL, EXTRACTING SAID RESIDUAL MATERIAL WITH A HOT SOLVENT COMPOSED OF A MIXTURE OF ETHYL ACETATE AND ETHYL ALCOHOL HAVING A VOLUME RATIO IN THE RANGE OF FROM ABOUT 1:1 TO ABOUT 3:1, RESPECTIVELY, TO PROVIDE AN EXTRACT CONTAINING REFINED FRANGULIN, AND RECOVERING ESSENTIALLY PURE FRANGULIN FROM SAID EXTRACT.
Claim 2
Dependent Claim
130 words
A PROCESS FOR THE PREPARATION OF 1,3,8-TRIHYDOXY-6METHYLANTHRAQUINONE-1-RHAMNOSIDE BY SELECTIVE EXTRACTION OF RHAMNACEAE WHICH COMPRISES SUBJECTING SAID RHAMNACEAE TO ENZYMATIC AUTOHYDROLYSIS IN THE PRESENCE OF WATER AND AN ACIDIFY-NEUTRALIZING, INSOLUBLE NON-TOXIC CARBONATE ADDED IN A PROPORTION OF ABOUT 10% BY WEIGHT OF THE RHAMNACEAE, FILTERING THE RESULTING MIXTURES TO RECOVER A SOLID RESIDUE, WASHING SAID RESIDUE WITH COLD WATER AND RINSING SAID COLD WATER-WASHED RESIDUE WITH COLD WATER AND RINSING SAID COLD WATER-WASHED RESIDUE WITH BOILING WATER, DRYING THE RESULTANT WASHED RESIDUAL MATERIAL, EXTRACTING SAID RESIDUAL MATERIAL WITH A HOT SOLVENT COMPOSED OF A MIXTURE OF ETHYL ACETATE AND ETHYL ALCOHOL HAVING A VOLUME RATIO IN THE RANGE OF FROM ABOUT 1:1 TO ABOUT 3:1, RESPECTIVELY, TO PROVIDE AN EXTRACT CONTAINING REFINED FRANGULIN, AND RECOVERING ESSENTIALLY PURE FRANGULIN FROM SAID EXTRACT.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |