Patent US3733401A successfully refreshed from Google Patents.
US3733401A
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US
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Highly attenuated newcastle disease virus vaccine and production thereof
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1970-11-30
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Granted: 1973-05-15
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Expires: 1990-11-30
Abstract
Abstract HIGHLY ATTENUATED NEWCASTLE DISEASE VIRUS VACCINE IS PROVIDED, AS WELL AS METHOD FOR PRODUCTION THEREOF BY (1) EITHER SUBJECTING NEWCASTLE DISEASE VIRUS (NDV) TO AT LEAST 20 SERIAL PASSAGES OF CULTIVATION IN A PORCINE TISSUE CULTURE, OR CULTIVATING THE VIROUS IN PORCINE STABLE CELL LINES FOR AT LEAST 2 MONTHS, (2) INOCULATING THE RESULTANT PORCINE CELLS CONTAINING ATTENUATED NDV ONTO A CHORIOALLANTOIC MEMBRANE OF A CHICK EMBRYO AND CULTIVATING THE INOCULATED CHICK EMBRYO, AND (3) SUBJECTING THE NDV RECOVERED FROM THE RESULTANT COMPLEX OF THE CHORIOALLANTOIC MEMBRANE AND PORCINE CELLS TO AT LEAST 2 SERIAL PASSAGES OF CULTIVATION IN THE ALLANTOIC CAVITY OF A CHICK EMBRYO.
Inventors
- 👤 H Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:45
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/12; A61K39/155; A61K39/17; A61K2039/51; A61K2039/525; A61K2039/5254; A61K2039/55; A61K2039/552; C; C12; C12N; C12N2760/00; C12N2760/00011; C12N2760/18011; C12N2760/18111; C12N2760/18134
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |