US2528482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of sterols from wool fat
Assignee: JBS USA LLC
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Filing: 1947-05-08
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Granted: 1950-10-31
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Expires: 1967-05-08
Abstract
No abstract record available.
Inventors
- 👤 Harland H Young
- 👤 Edward F Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:11
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/16; C; C07; C07J; C07J9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A PROCESS OF TREATING CRUDE WOOL FAT CONTAINING A SUBSTANTIAL AMOUNT OF STEROLS AND STEROL ESTERS OBTAINED FROM WOOL SCOURING WATERS TO PRODUCE A FRACTION RICH IN STEROLS AND STEROL ESTERS, WHICH COMPRISES SUBJECTING THE CRUDE WOOL FAT TO A TWO-STAGE LIQUID PHASE SOLVENT TREATMENT IN THE PRESENCE OF A LIQUEFIED NORMALLY GASEOUS HYDROCARBON SOLVENT, MAINTAINING CONDITIONS OF TEMPERATURE WITHIN THE RANGE OF ABOUT 160*F. TO 170*F. AND PRESSURE WITHIN THE RANGE OF ABOUT 550 TO 600 POUNDS PER SQUARE INCH IN THE FIRST STAGE WHEREBY COLOR BODIES ARE SEPARATED AND THE WOOL FAT IS SUBSTANTIALLY DECOLORIZED, MAINTAINING CONDITIONS OF TEMPERATURE WITHIN THE RANGE OF ABOUT 190*F. TO 200*F. AND PRESSURE WITHIN THE RANGE OF ABOUT 600 TO 700 POUNDS PER SQUARE INCH IN THE SECOND STAGE WHEREBY A FRACTION RELATIVELY RICH IN THE STEROLS AND STEROL ESTERS IS SEPARATED FROM THE DECOLORIZED PRODUCT, AND RECOVERING SAID FRACTION RICH IN STEROLS AND STEROL ESTERS FROM SAID SECOND STAGE.
Claim 2
Dependent Claim
158 words
A PROCESS OF TREATING CRUDE WOOL FAT CONTAINING A SUBSTANTIAL AMOUNT OF STEROLS AND STEROL ESTERS OBTAINED FROM WOOL SCOURING WATERS TO PRODUCE A FRACTION RICH IN STEROLS AND STEROL ESTERS, WHICH COMPRISES SUBJECTING THE CRUDE WOOL FAT TO A TWO-STAGE LIQUID PHASE SOLVENT TREATMENT IN THE PRESENCE OF A LIQUEFIED NORMALLY GASEOUS HYDROCARBON SOLVENT, MAINTAINING CONDITIONS OF TEMPERATURE WITHIN THE RANGE OF ABOUT 160*F. TO 170*F. AND PRESSURE WITHIN THE RANGE OF ABOUT 550 TO 600 POUNDS PER SQUARE INCH IN THE FIRST STAGE WHEREBY COLOR BODIES ARE SEPARATED AND THE WOOL FAT IS SUBSTANTIALLY DECOLORIZED, MAINTAINING CONDITIONS OF TEMPERATURE WITHIN THE RANGE OF ABOUT 190*F. TO 200*F. AND PRESSURE WITHIN THE RANGE OF ABOUT 600 TO 700 POUNDS PER SQUARE INCH IN THE SECOND STAGE WHEREBY A FRACTION RELATIVELY RICH IN THE STEROLS AND STEROL ESTERS IS SEPARATED FROM THE DECOLORIZED PRODUCT, AND RECOVERING SAID FRACTION RICH IN STEROLS AND STEROL ESTERS FROM SAID SECOND STAGE.
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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |