US2585954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of sterols
Assignee: Individual
•
Filing: 1949-10-10
•
Granted: 1952-02-19
•
Expires: 1969-10-10
Abstract
No abstract record available.
Inventors
- 👤 Mattikow Morris
- 👤 Perlman David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:27
CPC Classifications
C; C07; C07J; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD OF RECOVERING STEROLS FROM VEGETABLE OIL PHOSPHATIDIC MATERIAL, WHICH COMPRISES, TREATING SAID MATERIAL WITH AN EXCESS OF A STRONG NON-OXIDIZING ACID IN A LOWER ALIPHATIC ALCOHOL CONTAINING NOT MORE THAN 5 CARBON ATOMS AND AT A TEMPERATURE BETWEEN APPROXIMATELY 64* C. AND 150* C. FOR SUFFICIENT TIME TO DECOMPOSE THE PHOSPHATIDES OF SAID PHOSPHATIDIC MATERIAL AND LIBERATE SUBSTANTIALLY ALL OF THE STEROLS, THE AMOUNT OF ALCOHOL BEING SUFFICIENT TO DISSOLVE THE RESULTING PRODUCTS AT SAID TEMPERATURE, THEREAFTER COOLING THE RESULTING SOLUTION TO A TEMPERATURE BETWEEN APPROXIMATELY 0* AND 20* C. TO CAUSE CRYSTALLIZATION OF CRYSTALS OF SAID STEROLS, AND SEPARATING SAID CRYSTALS FROM THE COOLED SOLUTION.
Claim 2
Independent Claim
108 words
THE METHOD OF RECOVERING STEROLS FROM VEGETABLE OIL PHOSPHATIDIC MATERIAL, WHICH COMPRISES, TREATING SAID MATERIAL WITH AN EXCESS OF A STRONG NON-OXIDIZING ACID IN A LOWER ALIPHATIC ALCOHOL CONTAINING NOT MORE THAN 5 CARBON ATOMS AND AT A TEMPERATURE BETWEEN APPROXIMATELY 64* C. AND 150* C. FOR SUFFICIENT TIME TO DECOMPOSE THE PHOSPHATIDES OF SAID PHOSPHATIDIC MATERIAL AND LIBERATE SUBSTANTIALLY ALL OF THE STEROLS, THE AMOUNT OF ALCOHOL BEING SUFFICIENT TO DISSOLVE THE RESULTING PRODUCTS AT SAID TEMPERATURE, THEREAFTER COOLING THE RESULTING SOLUTION TO A TEMPERATURE BETWEEN APPROXIMATELY 0* AND 20* C. TO CAUSE CRYSTALLIZATION OF CRYSTALS OF SAID STEROLS, AND SEPARATING SAID CRYSTALS FROM THE COOLED SOLUTION.
References Cited (Backward Citations)
US1667767A
Cited
GB413923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |