Patent US3226338A successfully refreshed from Google Patents.
US3752833A
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Phosphatide separation
Assignee: Lever Brothers Co
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Filing: 1971-08-27
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Granted: 1973-08-14
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Expires: 1991-08-27
Abstract
Abstract N-ACYLPHOSPHATIDES, FOR INSTANCE N-ACETYLCEPHALIN, ARE SEPARATED FROM PHOSPHATIDES WITHOUT AN ACYLATABE AMINO GROUP, FOR INSTANCE LECITHIN, BY MAKING A MIXTURE CONTAINING THEM ACID TO THE EQUIVALENT OF PH LESS THAN 3.5 UNDER AQUEOUS CONDITIONS AND SOLVENT-FRACTIONATING WITH ACETONE OR METHYL ACETATE.
Inventors
- 👤 R Aneja
- 👤 Chadha J Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:36
CPC Classifications
A; A23; A23J; A23J7/00; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/10; C07F9/103
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |