Patent US2738346A successfully refreshed from Google Patents.
US2738346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the separation of flavonoid compounds
Assignee: Individual
•
Filing: 1952-12-01
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Granted: 1956-03-13
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Expires: 1972-12-01
Abstract
No abstract record available.
Inventors
- 👤 Simon H Wender
- 👤 Clark H Ice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:29
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/06; C07H17/065; C07H17/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
AN IMPROVED METHOD FOR THE SEPARATION OF FLAVONOID COMPOUNDS, WHICH COMPRISES PASSING A SOLUTION OF SAID COMPOUNDS IN A RELATIVELY LOW MOLECULAR WEIGHT, ANHYDROUS ALIPHATIC ORGANIC SOLVENT THROUGH A BED OF A COMMINUTED HYDROUS MAGNESIUM SILICATE ADSORBENT, CHROMATOGRAPHICALLY ELUTING THE RESULTING ADSORBED COMPOUND FROM SAID BED WITH AN AQUEOUS-RELATIVELY LOW MOLECULAR WEIGHT ALIPHATIC ORGANIC SOLVENT, AND SEPARATELY COLLECTING THE INDIVIDUAL FLAVONOID COMPOUNDS.
Claim 2
Dependent Claim
62 words
AN IMPROVED METHOD FOR THE SEPARATION OF FLAVONOID COMPOUNDS, WHICH COMPRISES PASSING A SOLUTION OF SAID COMPOUNDS IN A RELATIVELY LOW MOLECULAR WEIGHT, ANHYDROUS ALIPHATIC ORGANIC SOLVENT THROUGH A BED OF A COMMINUTED HYDROUS MAGNESIUM SILICATE ADSORBENT, CHROMATOGRAPHICALLY ELUTING THE RESULTING ADSORBED COMPOUND FROM SAID BED WITH AN AQUEOUS-RELATIVELY LOW MOLECULAR WEIGHT ALIPHATIC ORGANIC SOLVENT, AND SEPARATELY COLLECTING THE INDIVIDUAL FLAVONOID COMPOUNDS.
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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |