US3390685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for extracting substances from plant particles
Assignee: Eresta Warenhandels GmbH
•
Filing: 1966-03-09
•
Granted: 1968-07-02
•
Expires: 1986-03-09
Abstract
No abstract record available.
Inventors
- 👤 Bethmann Max Freiherr Von
- 👤 Lipp Gerhard
- 👤 Bayer Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:36
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/18; A24B15/24; A24B15/241; A24B15/243; A24B15/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS OF SELECTIVELY REMOVING A PARTICULAR WATERAND ORGANIC SOLVENT-SOLUBLE SUBSTANCE OF ACID AND/OR BASIC REACTION FROM SOLID PLANT PARTICLES CONTAINING A PLURALITY OF WATER- AND ORGANIC SOLVENT-SOLUBLE SUBSTANCES WHICH COMPRISES: (A) EXTRACTING THE PLANT PARTICLE S WITH AN ORGANIC SOLVENT WHICH IS ESSENTIALLY INSOLUBLE IN WATER, WHEREBY A SOLUTION OF SAID SUBSTANCES IN SAID SOLVENT IS OBTAINED; (B) EXTRACTING SAID PARTICULAR SUBSTANCE FROM SAID SOLUTION WITH ATER WHICH IS ESSENTIALLY SATURATED WITH SAID SUBSTANCES EXCEPT FOR SAID PARTICULAR SUBSTANCE, WHEREBY AN AQUEOUS SOLUTION OF SAID PARTICULAR SUBSTANCE IS OBTAINED; AND (C) REMOVING SAID PARTICULAR SUBSTANCE FROM THE AQUEOUS SOLUTION BY ION EXCHANGE.
Claim 2
Dependent Claim
103 words
A PROCESS OF SELECTIVELY REMOVING A PARTICULAR WATERAND ORGANIC SOLVENT-SOLUBLE SUBSTANCE OF ACID AND/OR BASIC REACTION FROM SOLID PLANT PARTICLES CONTAINING A PLURALITY OF WATER- AND ORGANIC SOLVENT-SOLUBLE SUBSTANCES WHICH COMPRISES: (A) EXTRACTING THE PLANT PARTICLE S WITH AN ORGANIC SOLVENT WHICH IS ESSENTIALLY INSOLUBLE IN WATER, WHEREBY A SOLUTION OF SAID SUBSTANCES IN SAID SOLVENT IS OBTAINED; (B) EXTRACTING SAID PARTICULAR SUBSTANCE FROM SAID SOLUTION WITH ATER WHICH IS ESSENTIALLY SATURATED WITH SAID SUBSTANCES EXCEPT FOR SAID PARTICULAR SUBSTANCE, WHEREBY AN AQUEOUS SOLUTION OF SAID PARTICULAR SUBSTANCE IS OBTAINED; AND (C) REMOVING SAID PARTICULAR SUBSTANCE FROM THE AQUEOUS SOLUTION BY ION EXCHANGE.
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |