Patent US2566291A successfully refreshed from Google Patents.
US2566291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glucosides from strophanthus sarmentosus and process of making same
Assignee: CIBA PHARM PROD Inc
•
Filing: 1948-03-02
•
Granted: 1951-08-28
•
Expires: 1968-03-02
Abstract
No abstract record available.
Inventors
- 👤 Reichstein Tadeus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:30
CPC Classifications
C; C07; C07J; C07J19/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR THE MANUFACTURE OF NEW GLUCOSIDES FROM STROPHANTHUS SARMENTOSUS WHICH COMPRISES SUBJECTING AN ALCOHOL-FREE EXTRACT, WHICH IS OBTAINED FROM THE SEEDS OF STROPHANTHUS SARMENTOSUS WITH THE AID OF WATER AND A NEUTRAL WATER-SOLUBLE ORGANIC SOLVENT CONTAINING AT THE MOST 4 CARBON ATOMS, TO EXTRACTION BY MEANS OF AN ALIPHATIC CHLORINATED SOLVENT CONTAINING NOT MORE THAN TWO CARBON ATOMS WHEREBY UNDESIRED GLUCOSIDES ARE REMOVED, AND THEN SUBJECTING THE RESIDUAL AQUEOUS SOLUTION CONTAINING THE DESIRED DIFFICULTLY HYDROLYZABLE GLUCOSIDES SARMENTOSIDE A AND SAMETOSIDE B TO EXTRACTION WITH AN ALCOHOL OF LOW MOLECULAR WEIGHT WHEREBY THE SAID DESIRED GLUCOSIDES ARE EXTRACTED FROM SAID SOLUTION, AND ISOLATION FROM THE EXTRACT SOLUTION SO OBTAINED THE SAID DIFFICULTLY HYDROLYZABLE GLUCOSIDES SARMENTOSIDE A AND SARMENTOSIDE B.
Claim 2
Dependent Claim
120 words
A PROCESS FOR THE MANUFACTURE OF NEW GLUCOSIDES FROM STROPHANTHUS SARMENTOSUS WHICH COMPRISES SUBJECTING AN ALCOHOL-FREE EXTRACT, WHICH IS OBTAINED FROM THE SEEDS OF STROPHANTHUS SARMENTOSUS WITH THE AID OF WATER AND A NEUTRAL WATER-SOLUBLE ORGANIC SOLVENT CONTAINING AT THE MOST 4 CARBON ATOMS, TO EXTRACTION BY MEANS OF AN ALIPHATIC CHLORINATED SOLVENT CONTAINING NOT MORE THAN TWO CARBON ATOMS WHEREBY UNDESIRED GLUCOSIDES ARE REMOVED, AND THEN SUBJECTING THE RESIDUAL AQUEOUS SOLUTION CONTAINING THE DESIRED DIFFICULTLY HYDROLYZABLE GLUCOSIDES SARMENTOSIDE A AND SAMETOSIDE B TO EXTRACTION WITH AN ALCOHOL OF LOW MOLECULAR WEIGHT WHEREBY THE SAID DESIRED GLUCOSIDES ARE EXTRACTED FROM SAID SOLUTION, AND ISOLATION FROM THE EXTRACT SOLUTION SO OBTAINED THE SAID DIFFICULTLY HYDROLYZABLE GLUCOSIDES SARMENTOSIDE A AND SARMENTOSIDE B.
References Cited (Backward Citations)
US2179204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |