US2790793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining pur chestnutsaponin
Assignee: Honeywell Riedel de Haen AG
•
Filing: 1953-03-03
•
Granted: 1957-04-30
•
Expires: 1973-03-03
Abstract
No abstract record available.
Inventors
- 👤 Boedecker Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:25
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/20; C07H15/24; C07H15/256; A; A61; A61K; A61K36/00; A61K36/18; A61K36/185; A61K36/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR MANUFACTURING PURE, SOLID AND EAISLY PULVERIZABLE CHESTNUT-SAPONIN FROM AN AQUEOUS TOWER ALKANOL EXTRACT OF AESCULUS HIPPOCASTANUM WHICH COMPRISES THE STEPS OF REMOVING THE LOWER ALKANOL FROM THE CRUDE SOLUTION, TREATING THE AQUEOUS CONCENTRATED CHESTNUT-SAPONIN EXTRACT WITH METHYL ETHYL KETONE OF LIMITED WATER-MISCIBILITY OF EFFECT A STRATIFICATION WHEREIN THE IMPURITIES ARE PREFERNTIALLY CONTAINED IN LAYER, OF METHYL ETHYL KETONE, REMOVING SAID METHYL ETHYL KETONE LAYER, ADDING A SMALL AMOUNT OF A WATER-MISCIBLE LOWER ALKANOL TO REMAINING AQUEOUS LAYER CONTAINING THE CHESTNUTSAPONIN EXTRACT, AND EVAPORATING THE WATER TO OBTAIN A SOLID, LOOSE MASS OF PURE CHESTNUT-SAPONIN.
Claim 2
Dependent Claim
97 words
A PROCESS FOR MANUFACTURING PURE, SOLID AND EAISLY PULVERIZABLE CHESTNUT-SAPONIN FROM AN AQUEOUS TOWER ALKANOL EXTRACT OF AESCULUS HIPPOCASTANUM WHICH COMPRISES THE STEPS OF REMOVING THE LOWER ALKANOL FROM THE CRUDE SOLUTION, TREATING THE AQUEOUS CONCENTRATED CHESTNUT-SAPONIN EXTRACT WITH METHYL ETHYL KETONE OF LIMITED WATER-MISCIBILITY OF EFFECT A STRATIFICATION WHEREIN THE IMPURITIES ARE PREFERNTIALLY CONTAINED IN LAYER, OF METHYL ETHYL KETONE, REMOVING SAID METHYL ETHYL KETONE LAYER, ADDING A SMALL AMOUNT OF A WATER-MISCIBLE LOWER ALKANOL TO REMAINING AQUEOUS LAYER CONTAINING THE CHESTNUTSAPONIN EXTRACT, AND EVAPORATING THE WATER TO OBTAIN A SOLID, LOOSE MASS OF PURE CHESTNUT-SAPONIN.
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |