US3470067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration and purification of viruses from particulate magnetic iron oxide-virus complexes
Assignee: Pfizer Inc
•
Filing: 1967-09-19
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Granted: 1969-09-30
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Expires: 1987-09-19
Abstract
No abstract record available.
Inventors
- 👤 Joel Warren
- 👤 Alan L Neal
- 👤 David A Rennels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:40
CPC Classifications
C; C12; C12N; C12N7/00; C02; C02F; C02F2103/00; C02F2103/42; C12N2760/00; C12N2760/00011; C12N2760/16011; C12N2760/16111; C12N2760/16151
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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US2999792A
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US3078224A
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US3139401A
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US3197374A
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US3256152A
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US3351203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |