US2525785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for extracting alkaloidals from plants with aqueous ammoniaethylene dichloride mixture
Assignee: Individual
•
Filing: 1949-12-05
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Granted: 1950-10-17
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Expires: 1969-12-05
Abstract
No abstract record available.
Inventors
- 👤 Feinstein Louis
- 👤 Patrick J Hannan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR OBTAINING ALKALOIDAL SUBSTANCES FROM PLANT MATERIAL, COMPRISING: EXTRACTING THE PLANT MATERIAL WITH CONCENTRATED AQUEOUS AMMONIA AND ETHYLENE DICHLORIDE, DISTILLING THE EXTRACT TO REMOVE THE AMMONIA AND TO REMOVE PART OF THE ETHYLENE DICHLORIDE TO FORM A CONCENTRATED EXTRACT CONTACTING THE CONCENTRATED EXTRACT WITH AQUEOUS ALUMINUM SULFATE, THE LATTER BEING PRESENT IN GREATER VOLUME THAN THE CONCENTRATED EXTRACT DURING SAID CONTACTING, ADDING AMMONIA TO THE AQUEOUS EXTRACT TO BRING THE PH TO ABOUT 8 TO PRECIPITATE ALUMINUM HYDROXIDE, REMOVING THE ALUMINUM HYDROXIDE, ADDING ORE AMMONIA TO FREE THE ALKALOIDS, EXTRACTING THE ALKALOIDS FROM THE AQUEOUS EXTRACT WITH THEYLENE DICHLORIDE, AND REMOVING THE AMMONIA AND ETHYLENE DICHLORIDE.
Claim 2
Dependent Claim
108 words
A PROCESS FOR OBTAINING ALKALOIDAL SUBSTANCES FROM PLANT MATERIAL, COMPRISING: EXTRACTING THE PLANT MATERIAL WITH CONCENTRATED AQUEOUS AMMONIA AND ETHYLENE DICHLORIDE, DISTILLING THE EXTRACT TO REMOVE THE AMMONIA AND TO REMOVE PART OF THE ETHYLENE DICHLORIDE TO FORM A CONCENTRATED EXTRACT CONTACTING THE CONCENTRATED EXTRACT WITH AQUEOUS ALUMINUM SULFATE, THE LATTER BEING PRESENT IN GREATER VOLUME THAN THE CONCENTRATED EXTRACT DURING SAID CONTACTING, ADDING AMMONIA TO THE AQUEOUS EXTRACT TO BRING THE PH TO ABOUT 8 TO PRECIPITATE ALUMINUM HYDROXIDE, REMOVING THE ALUMINUM HYDROXIDE, ADDING ORE AMMONIA TO FREE THE ALKALOIDS, EXTRACTING THE ALKALOIDS FROM THE AQUEOUS EXTRACT WITH THEYLENE DICHLORIDE, AND REMOVING THE AMMONIA AND ETHYLENE DICHLORIDE.
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) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |