Patent US2952674A successfully refreshed from Google Patents.
US2952674A
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Method for the selective extraction of water soluble complex mixtures of biologically active flavonoid substances
Assignee: US Vitamin Corp
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Filing: 1958-08-08
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Granted: 1960-09-13
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Expires: 1978-08-08
Abstract
No abstract record available.
Inventors
- 👤 Merritt A Jay
- 👤 Freedman Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:39
CPC Classifications
A; A61; A61K; A61K36/00; A61K36/18; A61K36/185; A61K36/75; A61K36/752; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0446; B01D11/0492
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR SELECTIVELY EXTRACTING BIOLOGICALLYACTIVE WATER-SOLUBLE COMPLEX MIXTURES OF FLAVONOID SUBSTANCES FROM PLANT MATERIAL CONTAINING SUCH SUBSTANCES MIXED WITH NON-FLAVONOID SUBSTANCES, WHICH COMPRISES CONTACTING THE MATERIAL SIMULTANEOUSLY WITH B-BUTYL ALCOHOL AND WITH WATER IN SEPARATE PHASES, THE BUTYL ALCOHOL PHASE BEING SATURATED WITH WATER AND THE WATER PHASE BEING SATURATED WITH BUTYL ALCOHOL, THEREBY DISSOLVING THE WATER-SOLUBLE FLAVONOID SUBSTANCES IN THE BUTYL ALCOHOL PHASE AND DISSOLVING THE NON-FLAVONOID SUBSTANCES IN THE WATER PHASE, AND SEPARATING THE PHASES.
Claim 2
Dependent Claim
78 words
A PROCESS FOR SELECTIVELY EXTRACTING BIOLOGICALLYACTIVE WATER-SOLUBLE COMPLEX MIXTURES OF FLAVONOID SUBSTANCES FROM PLANT MATERIAL CONTAINING SUCH SUBSTANCES MIXED WITH NON-FLAVONOID SUBSTANCES, WHICH COMPRISES CONTACTING THE MATERIAL SIMULTANEOUSLY WITH B-BUTYL ALCOHOL AND WITH WATER IN SEPARATE PHASES, THE BUTYL ALCOHOL PHASE BEING SATURATED WITH WATER AND THE WATER PHASE BEING SATURATED WITH BUTYL ALCOHOL, THEREBY DISSOLVING THE WATER-SOLUBLE FLAVONOID SUBSTANCES IN THE BUTYL ALCOHOL PHASE AND DISSOLVING THE NON-FLAVONOID SUBSTANCES IN THE WATER PHASE, AND SEPARATING THE PHASES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |