Anionic sizes
Patent 4001193 Issued on January 4, 1977. Estimated Expiration Date: 
January 4, 1994. 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.
January 4, 1994. 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 References 3547898 3635915 InventorsAssigneeApplicationNo. 437209 filed on 01/28/1974US Classes:525/329.6, Butene dioic acid or derivative monomer162/168.1, Polymerized unsaturated compound162/168.7, Ester type525/329.5, Polymer derived from carboxylic acid or derivative monomer other than: vinyl acetate; or acrylic-or-methacrylic-acid, or derivatives525/339, Treating in the presence of an elemental metal or inorganic metallic compound525/378, Ammonia, ammonium hydroxide, or salts thereof525/379, Organic amine525/380, Amine contains a hydroxyl group525/382Two amine groupsExaminersPrimary: Kight, III, JohnAttorney, Agent or FirmForeign Application Priority Data1973-01-31 DTAbstractImproved anionic sizes of alkali metal or ammonium salts of copolymers of 0.5- 50% by weight of an aliphatic or cycloaliphatic half ester of ,ଲ-monoolefinisch unsaturated dicarboxylic acids, 6-40% by weight of acrylic and/or methacrylic acid and 40-85% by weight of an aromatic monovinyl compound such as styrene. | |
