US2772297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sterol recovery
Assignee: Individual
•
Filing: 1953-02-16
•
Granted: 1956-11-27
•
Expires: 1973-02-16
Abstract
No abstract record available.
Inventors
- 👤 Kathleen M Laquer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:40
CPC Classifications
C; C07; C07J; C07J9/00; A; A61; A61K; A61K36/00; A61K36/18; A61K36/185; A61K36/48; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A METHOD OF OBTAINING SITOSTREOL FROM A BY-PRODUCT OF THE REFINING OF A SITOSTEROL-CONTAINING OIL AND SELECTED FROM THE CLASS CONSISTING OF THE ACIDULATED FOOTS AND STILL BOTTOM PITCHES OF SUCH AN OIL, WHICH METHOD COMPRISES TREATING SUCH A BY-PRODUCT UNDER SAPONIFYING CONDITIONS WITH SUFFICIENT OF A WATER-SOLUBLE ALKALINE SAPONIFYING AGENT TO SAPONIFY ITS SAPONIFIABLE CONSTITUENTS, IN PRESENCE OF A WATER-SOLUBLE LOWER ALIPHATIC ALCOHOL; THEN MIXING THE SAPONIFICATION PRODUCTS WITH SUFFICIENT OF A FINELY DIVIDED, WATER-INSOLUBLE DRYING-AND-EXTRACTION-AID, NON-RE ACTIVE WITH THE ORGANIC PORTION OF SAID PRODUCTS AND INERT TO, AND INSOLUBLE IN, THE SOLVENT TO BE USED IN THE SUBSEQUENT EXTRACTION STEP, AT LEAST TO FORM A THICK SLURRY; THEREAFTER DRYING THE SLURRY UNDER CONDITIONS TO AVOID SIGNIFICANT DECOMPOSITION OF THE SITOSTEROL; AND EXTRACTING THE STEROLS FROM THE DRY MIXTURE WITH A SITOSTEROLSOLVENT WHICH IS AT LEAST ONE MEMBER OF THE CLASS CONSISTING OF ACETONE, ETHYLENE DICHLORIDE, METHANOL, MIXTURES OF METHANOL AND ETHYLENE DICHLORIDE, AND ETHYL ACETATE; AND SEPARATING THE SITOSTEOL FROM THE SOLVENT.
Claim 2
Independent Claim
164 words
A METHOD OF OBTAINING SITOSTREOL FROM A BY-PRODUCT OF THE REFINING OF A SITOSTEROL-CONTAINING OIL AND SELECTED FROM THE CLASS CONSISTING OF THE ACIDULATED FOOTS AND STILL BOTTOM PITCHES OF SUCH AN OIL, WHICH METHOD COMPRISES TREATING SUCH A BY-PRODUCT UNDER SAPONIFYING CONDITIONS WITH SUFFICIENT OF A WATER-SOLUBLE ALKALINE SAPONIFYING AGENT TO SAPONIFY ITS SAPONIFIABLE CONSTITUENTS, IN PRESENCE OF A WATER-SOLUBLE LOWER ALIPHATIC ALCOHOL; THEN MIXING THE SAPONIFICATION PRODUCTS WITH SUFFICIENT OF A FINELY DIVIDED, WATER-INSOLUBLE DRYING-AND-EXTRACTION-AID, NON-RE ACTIVE WITH THE ORGANIC PORTION OF SAID PRODUCTS AND INERT TO, AND INSOLUBLE IN, THE SOLVENT TO BE USED IN THE SUBSEQUENT EXTRACTION STEP, AT LEAST TO FORM A THICK SLURRY; THEREAFTER DRYING THE SLURRY UNDER CONDITIONS TO AVOID SIGNIFICANT DECOMPOSITION OF THE SITOSTEROL; AND EXTRACTING THE STEROLS FROM THE DRY MIXTURE WITH A SITOSTEROLSOLVENT WHICH IS AT LEAST ONE MEMBER OF THE CLASS CONSISTING OF ACETONE, ETHYLENE DICHLORIDE, METHANOL, MIXTURES OF METHANOL AND ETHYLENE DICHLORIDE, AND ETHYL ACETATE; AND SEPARATING THE SITOSTEOL FROM THE SOLVENT.
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |