US3189596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fractionating aqueous extracts from barks of trees
Assignee: Weyerhaeuser Co
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Filing: 1961-10-03
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Granted: 1965-06-15
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Expires: 1981-10-03
Abstract
No abstract record available.
Inventors
- 👤 David L Brink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:53
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/10; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/26; C07D311/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE PROCESS OF FRACTIONATING AN AQUEOUS EXTRACT DERIVED BY TREATING COMMINUTED TREE BARK WITH WATER AT ELEVATED TEMPERATUES AND CONTAINING IN SOLUTION, AROMATIC SUBSTANCES INCLUDING DIHYDROQUERCETIN, POLYPHENOLS, PHENOLS AND PHENOLIC POLYMERS AND CARBOHYDRATE SUBSTANCES INCLUDING REDUCING SUGARS, COMPRISING ADJUSTING THE PH OF SAID EXTRACT TO AT LEAST 10, AND TREATING SAID EXTRACT WITH AT LEAST 20%, BASE ON THE WEIGHT OF THE DISSOLVED SOLIDS, OF A WATER DISSOCIABLE ALKALINE EARTH METAL COMPOUND, CALCULATED AS THE OXIDE OF THE ALKALINE EARTH METAL, UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS TO FORM A PRECIPITATE PHASE CONTAINING THE AROMATIC SUBSTANCES AND A SOLUTE PHASE CONTAINING THE CARBOHYDRATE SUBSTANCES, AND SEPARATING THE RESPECTIVE PHASES.
Claim 2
Dependent Claim
107 words
THE PROCESS OF FRACTIONATING AN AQUEOUS EXTRACT DERIVED BY TREATING COMMINUTED TREE BARK WITH WATER AT ELEVATED TEMPERATUES AND CONTAINING IN SOLUTION, AROMATIC SUBSTANCES INCLUDING DIHYDROQUERCETIN, POLYPHENOLS, PHENOLS AND PHENOLIC POLYMERS AND CARBOHYDRATE SUBSTANCES INCLUDING REDUCING SUGARS, COMPRISING ADJUSTING THE PH OF SAID EXTRACT TO AT LEAST 10, AND TREATING SAID EXTRACT WITH AT LEAST 20%, BASE ON THE WEIGHT OF THE DISSOLVED SOLIDS, OF A WATER DISSOCIABLE ALKALINE EARTH METAL COMPOUND, CALCULATED AS THE OXIDE OF THE ALKALINE EARTH METAL, UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS TO FORM A PRECIPITATE PHASE CONTAINING THE AROMATIC SUBSTANCES AND A SOLUTE PHASE CONTAINING THE CARBOHYDRATE SUBSTANCES, AND SEPARATING THE RESPECTIVE PHASES.
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |