Surface sizing compositions for paper
Patent 4115331 Issued on September 19, 1978. Estimated Expiration Date: 
January 11, 1997. 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 11, 1997. 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 2999038 3726822 3865765 3876452 3925328 Surface sizing of paper with an acrylic copolymer where scum formation is minimized Patent #: 4030970 InventorsAssigneeApplicationNo. 05/758480 filed on 01/11/1977US Classes:524/53, At least one carboxylic acid ester524/272, Solid polymer derived from at least one ethylenic compound containing a carboxylic acid or derivative524/28, Algin or derivative524/45, Carboxyalkyl or alkali metal salt thereof524/499, Solid polymer derived from monomer from unsaturated petroleum hydrocarbon fraction or product thereof524/558, Acid or ester contains an oxygen atom which is other than part of a free carboxyl group or carboxylic acid ester group524/560, From ester derived from at least one unsaturated carboxylic acid and a saturated alcohol, e.g., methyl methacrylate, etc.525/201, Solid polymer derived from metal-containing ethylenic reactant525/217, Solid polymer derived from reactant containing nitrogen atom other than from (meth)acrylonitrile525/221, Solid polymer derived from reactant containing a carboxylic acid group525/57, With solid polymer derived from ethylenic reactants only526/240, From metal containing monomer528/201Fused- or bridged-ring-containing reactant other than solely as a polycarboxylic acid anhydride groupExaminersPrimary: Levin, Stanford M.Attorney, Agent or FirmInternational ClassesD21H 17/00 (20060101)D21H 17/43 (20060101) Foreign Application Priority Data1973-05-31 JPAbstractA paper surface-sized with a surface sizing composition, which comprises a copolymer of acrylic or methacrylic ester, alkai metal salts of acrylic or methacrylic acid, and acrylic or methacrylic acid, or lower alkyl amine salts thereof. | |
