Patent US3933789A successfully refreshed from Google Patents.
US3933789A
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Extraction of sterolins from plant material
Assignee: Roecar Holdings Netherlands Antilles NV
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Filing: 1973-03-05
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Granted: 1976-01-20
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Expires: 1993-03-05
Abstract
Abstract A method of obtaining a sterolin-rich product useful in the treatment of geriatric complaints such as benign hypertrophy of the prostate, comprising pulping a plant product containing sterolin, boiling the pulp in water, filtering the material thus obtained, and concentrating the filtrate to dryness, preferably at least in part by spray drying.
Inventors
- 👤 Karl Heinrich Pegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:32
CPC Classifications
A; A61; A61K; A61K36/00; A61K36/18; A61K36/88; A61K36/896
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
In a method for manufacturing a sterolin-rich product consisting essentially of the steps of, comminuting a plant material containing sterolins, and deactivating the sterolin-specific degradative enzymes systems by heating the material at a stage not later than immediately following comminution to a temperatuare of at least 60°C.: the improvement comprising extracting the sterolins from the comminuted material in aqueous solution by boiling the comminuted material in water for a continuous period of at least thirty minutes, separating the extract solution from the comminuted material, and concentrating the extract solution.
Claim 2
Dependent Claim
89 words
In a method for manufacturing a sterolin-rich product consisting essentially of the steps of, comminuting a plant material containing sterolins, and deactivating the sterolin-specific degradative enzymes systems by heating the material at a stage not later than immediately following comminution to a temperatuare of at least 60°C.: the improvement comprising extracting the sterolins from the comminuted material in aqueous solution by boiling the comminuted material in water for a continuous period of at least thirty minutes, separating the extract solution from the comminuted material, and concentrating the extract solution.
Claim 3
Dependent Claim
33 words
The method of claim 1 in which the heating step is performed immediately following comminution, the temperature of the material being raised rapidly to a level at least of the order of 60°C.
Claim 4
Dependent Claim
24 words
The method of claim 1 in which the heating and extraction steps coincide, the comminuted material being added to boiling water immediately following comminution.
Claim 5
Dependent Claim
22 words
The method of claim 1, in which the product is a powder, the concentration step comprising concentrating the extract solution to dryness.
Claim 6
Dependent Claim
12 words
The method of claim 4 in which the extract solution is spray-dried.
References Cited (Backward Citations)
US2534260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |