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Patent US2811449A successfully refreshed from Google Patents.
US2811449A
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Process for the clarification of vegetable beverages
Assignee: GAF Chemicals Corp
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Filing: 1954-12-30
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Granted: 1957-10-29
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Daniel B Witwer
- 👤 Joseph M Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:38
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/70; A23L2/80; C; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12H1/0416; C12H1/0424
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE PROCESS FOR REMOVING TANNINS, TANNIC ACID AND PROTEIN-TANNIN COMPLEXES FROM VEGETABLE BEVERAGES, WHICH COMPRISES ADDING TO THE BEVERAGE CONTAINING AT LEAST ONE OF THE AFORESAID COMPOUNDS, A WATER-SOLUBLE COPOLYMER SUBSTANTIALLY CONSISTING OF N-VINYL PYRROLIDONE COPOLYMERIZED WITH A VINYL ESTER OF A MONOBASIC ALIPHATIC CARBOXYLIC ACID HAVING UP TO 4 CARBON ATOMS, AND SEPARATING THE RESULTING PRECIPITATE FROM THE BEVERAGE.
Claim 2
Dependent Claim
60 words
THE PROCESS FOR REMOVING TANNINS, TANNIC ACID AND PROTEIN-TANNIN COMPLEXES FROM VEGETABLE BEVERAGES, WHICH COMPRISES ADDING TO THE BEVERAGE CONTAINING AT LEAST ONE OF THE AFORESAID COMPOUNDS, A WATER-SOLUBLE COPOLYMER SUBSTANTIALLY CONSISTING OF N-VINYL PYRROLIDONE COPOLYMERIZED WITH A VINYL ESTER OF A MONOBASIC ALIPHATIC CARBOXYLIC ACID HAVING UP TO 4 CARBON ATOMS, AND SEPARATING THE RESULTING PRECIPITATE FROM THE BEVERAGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |