US3629470A
Expired / Lapsed
US
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Process for purification of animal rna viruses
Assignee: SmithKline Beecham Corp
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Filing: 1968-04-08
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Granted: 1971-12-21
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Expires: 1988-04-08
Abstract
Abstract A PROCESS FOR THE PURIFICATION OR CONCENTRATION OF ANIMAL RNA VIRUSES OF THE MYXOVIRUS OR PARAMYXOVIRUS GROUP OR THE RESPIRATORY SYNCYTIAL OR REBELLA VIRUSES WHICH INCLUDES THE STEPS OF PRECIPITATING THE VIRUS FROM SOLUTION BY MEANS OF A WATER SOLUBLE POLYALKYLENE GLYCOL IN THE PRESENCE OF AN ELECTROLYTE HAVING A PARTICULAR CONVENTRATION IN A SUBSTANTIALLY NEUTRAL MEDIUM AND SEPARATING THE PRECIPITATE CONTAINING THE VIRUS.
Inventors
- 👤 Alexander David Kanarek
- 👤 George William Tribe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
C; C12; C12N; C12N7/00; C12N2760/00; C12N2760/00011; C12N2760/16011; C12N2760/16111; C12N2760/16151; C12N2760/16211; C12N2760/16251; C12N2760/18011; C12N2760/18611; C12N2760/18651
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |