US3554759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of beer
Assignee: Evonik Operations GmbH
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Filing: 1968-04-01
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Granted: 1971-01-12
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Expires: 1988-04-01
Abstract
Abstract BEER IS TREATED TO IMPROVE ITS STABILITY DURING STORAGE WHEREBY THE BEER IS CONTACTED WITH A MODIFIED FINELY DIVIDED SILICA OBTAINED BY PRECIPITATING SILICA FROM AN AQUEOUS ALKALI METAL SILICATE SOLUTION WITH AN ACID IN THE PRESENCE OF WATER SOLUBLE POLYVINYL PYRROLIDONE, POLYVINYL-3METHYL PYRRODIDONE OR VINYL PYRROLIDONE-VINYL ACETATE COPOLYMERS.
Inventors
- 👤 Helmut Beschke
- 👤 Helmut Reinhardt
- 👤 Bezirk Cologne
- 👤 Karl Achenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:26
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/187; C01B33/193; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C01P; C01P2006/00; C01P2006/12; C01P2006/80
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |