Patent US3597455A successfully refreshed from Google Patents.
US3597455A
Expired / Lapsed
US
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Process for manufacture of sterile lecithin
Assignee: ER Squibb and Sons LLC
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Filing: 1969-05-29
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Granted: 1971-08-03
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Expires: 1989-05-29
Abstract
Abstract STERILE LECITHIN IS OBTAINED BY SUBJECTING A SOLUTION OF LECITHIN IN A NON-AQUEOUS SOLVENT TO A STERILE FILTRATION FOLLOWED BY LYOPHILZATION OF THE FILTRATE.
Inventors
- 👤 Arnold Arons
- 👤 Lewis Cowen
- 👤 Friedrich Dursch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:48
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/66; A61K31/683; A61K31/685; A61K31/33; A61K31/395; A61K31/41; A61K31/425; A61K31/429; A61K31/43; A61L; A61L2/00; A61L2/02; A61L2/022
Claims Analysis
Total Claims: 0
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |