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US3655871A
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Inactivation of influenza viruses with lower alkyl esters of acetic acid
Assignee: Rhone Poulenc SA
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Filing: 1967-11-20
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Granted: 1972-04-11
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Expires: 1987-11-20
Abstract
Abstract VACCINES ARE PREPARED FROM MONOVALENT OR POLYVALENT INACTIVATED VIRAL SUSPENSIONS OF HUMAN, EQUINE, PORCINE, OR FOWL INFLUENZA VIRUSES, SAID SUSPENSIONS BEING PREPARED BY CULTIVATING IN THE ALLANTOIC CAVITY OF THE EMBRYONATED CHICKEN EGG A SAID VIRUS, SEPARATING THE ALLANOTIC LIQUID CONTAINING THE VIRUS, PURIFYING THE VIRAL SUSPENSION SO OBTAINED BY CENTRIFUGATION, AND TREATING A PURIFIED SUSPENSION OF THE VIRUS WITH DIETHYL ETHER OR ETHYL ACETATE TO INACTIVATE THE VIRUS, USING CONDITIONS WHICH MAINTAIN THE NEURAMINIDASE ACTIVITY OF THE VIRUS.
Inventors
- 👤 Georges Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:22
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/12; A61K39/145; A61K2039/51; A61K2039/525; A61K2039/5252; A61K2039/54; A61K2039/541; A61K2039/543; A61K2039/555; A61K2039/55511; A61K2039/55566; C; C12; C12N; C12N2760/00; C12N2760/00011; C12N2760/16011; C12N2760/16111; C12N2760/16134; C12N2760/16211; C12N2760/16234
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |