US3636191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vaccine against viral hepatitis and process
Assignee: The Institute of Cancer Research: Royal Cancer Hospital
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Filing: 1969-10-08
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Granted: 1972-01-18
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Expires: 1989-10-08
Abstract
Abstract A VACCINE AGAINST VIRAL HEPATITIS IS DERIVED FROM BLOOD CONTAINING AUSTRALIA ANTIGEN, HAVING PARTICLES RESEMBLING VIRUSES WHICH ARE SUBSTANTIALLY FREE FROM NULELIC ACID, OF A SIZE RANGE OF 180 TO 210 A., SUBSTANTIALLY FREE FROM INFECTIOUS PARTICLES. THE VACCINE EHERE REQUIRED IS ATTENUATED OR ALTERED. THE PREFERRED PROCEDURE FOR REMOVING IMPURTIES INCLUDING INFECTIOUS COMPONENTS INVOLVES CENTRIFUGATION, ENZYME DIGESTION, COLUMN GEL FILTRATION, DIFFERENTIAL DENSITY CENTRIFUGATION IN A SOLUTION OF SUCROSE, DIALYSIS, DIFFERENTIAL DENSITY CENTRIFUGATION IN A SOLUTION OF CESIUM CHLORIDE, AND DIALYSIS.
Inventors
- 👤 Baruch S Blumberg
- 👤 Irving Millman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:17
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/12; A61K39/29; A61K39/292; C; C12; C12N; C12N2730/00; C12N2730/00011; C12N2730/10011; C12N2730/10111; C12N2730/10134; Y; Y10; Y10S; Y10S530/00; Y10S530/806
Claims Analysis
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |