US2499430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obtaining sterols of high purity
Assignee: PPG Industries Inc
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Filing: 1947-07-30
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Granted: 1950-03-07
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Expires: 1967-07-30
Abstract
No abstract record available.
Inventors
- 👤 Henry A Vogel
- 👤 Roger M Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:25
CPC Classifications
C; C07; C07J; C07J9/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A PROCESS OF OBTAINING STEROLS OF 90 TO 100% PURITY FORM A CONCENTRATE OF SAID STEROLS CONTAINING ABOUT 20 TO 50% THEREOF IN ADMIXTURE WITH HIGHER ALCOHOLS, WHICH IS THE SAME AS THAT OBTAINED BY SAPONIFYING THE ROSIN ACIDS AND FATTY ACIDS OF TALL OIL AND EXTRACTING OUT THE UNSAPONIFIABLE MATTER FROM A WATER AND ISOPROPYL ALCOHOL SOLUTION THEREOF WITH NAPHTHA, THE STEPS WHICH COMPRISE DISSOLVING SAID CONCENTRATE IN NAPHTHA, EXTRACTING THE NAPHTHA SOLUTION WITH FURFURAL TO REMOVE THE STEROLS, THEN REMOVING THE FURFURAL FROM THE EXTRACTED MATERIAL.
Claim 2
Dependent Claim
89 words
IN A PROCESS OF OBTAINING STEROLS OF 90 TO 100% PURITY FORM A CONCENTRATE OF SAID STEROLS CONTAINING ABOUT 20 TO 50% THEREOF IN ADMIXTURE WITH HIGHER ALCOHOLS, WHICH IS THE SAME AS THAT OBTAINED BY SAPONIFYING THE ROSIN ACIDS AND FATTY ACIDS OF TALL OIL AND EXTRACTING OUT THE UNSAPONIFIABLE MATTER FROM A WATER AND ISOPROPYL ALCOHOL SOLUTION THEREOF WITH NAPHTHA, THE STEPS WHICH COMPRISE DISSOLVING SAID CONCENTRATE IN NAPHTHA, EXTRACTING THE NAPHTHA SOLUTION WITH FURFURAL TO REMOVE THE STEROLS, THEN REMOVING THE FURFURAL FROM THE EXTRACTED MATERIAL.
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) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |