US3743720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry water-dispersible aluminum hydroxide gels
Assignee: Bayer Corp
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Filing: 1969-08-01
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Granted: 1973-07-03
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Expires: 1989-08-01
Abstract
Abstract DRY, WATER-DISPERSIBLE PREPARATION OF ANTIBODY-PRODUCING OR IMMUNIZING SUBSTANCES SUCH AS ALLERGENS, WITH ALUMINUM HYDROXIDE GELS ADSORBED THEREON PRODUCED BY A PROCESS OF FREEZE-DRYING A SUSPENSION OF THE GEL IN THE PRESENCE OF POLYHYDRIC ALCOHOLS.
Inventors
- 👤 A Fosker
- 👤 P Mill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:26
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/39; A61K2039/555; A61K2039/55505
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |