Polyamide compositions for removal of polyphenols from liquids
Patent 5628910 Issued on May 13, 1997. Estimated Expiration Date: 
June 28, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 28, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 672860 filed on 06/28/1996US Classes:210/691, From aqueous material210/692, Utilizing synthetic resin426/330.3, Beverage or beverage concentrate426/330.4, Alcohol containing426/330.5, Fruit and vegetable juice426/422, Treatment of liquid with nongaseous material other than water per se426/423Inorganic silicon containing material, e.g., clay, etc.ExaminersPrimary: Nessler, Cynthia L.Attorney, Agent or FirmInternational ClassC02F 001/28AbstractAmide-containing polymers characterized by the presence of piperazine amide and/or substituted piperazine amide in the polymer chain are used as adsorbents to remove polyphenolic compounds from liquids. The compositions are especially useful in combination with protein removal agents such as silica gel or tannin. The amide-containing polymer compositions (alone or in combination with protein removal agents) are especially useful in the stabilization and/or chillproofing of plant derived liquids or beverages such as beer, wine, fruit juice and vegetable juice. | |
