Filled-polystyrene laminates
Patent 4101050 Issued on July 18, 1978. Estimated Expiration Date: 
September 14, 1996. 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.
September 14, 1996. 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 3284542 3413249 3660849 3846360 3861994 3916076 Filled thermoplastic Receptacle of foamed plastic lined with unoriented polyolefin film Patent #: 4008347 InventorsAssigneeApplicationNo. 05/723285 filed on 09/14/1976US Classes:428/35.7, Polymer or resin containing (i.e., natural or synthetic)229/5.84, Box material coated, laminated, or permeated with a thermoplastic material264/321, Sponge-like or foamed work264/45.3, Incorporating particulate material, fibers, or batts in a random distribution within a foamed body264/45.9, Including extrusion428/158, Foamed or cellular component428/317.9, Void-containing component contains also a solid fiber or solid particle428/319.9, Hydrocarbon polymer428/441, Next to addition polymer from unsaturated monomers428/443, Of asbestos428/451, Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product428/454, Sand, clay or mica (silica excluded)428/494, Next to aldehyde or ketone condensation product or addition polymer from unsaturated monomers428/497, Of natural gum, rosin, natural oil or lac428/515, Next to second addition polymer from unsaturated monomers428/516, Monoolefin polymer428/517, Next to polyene polymer428/519, Including polyene monomers428/702, O-containing521/122, Ingredient contains a silicon atom521/123, Ingredient contains a metal atom524/423, Sulfate group, e.g., calcium sulfate, etc.524/424, Carbon atom DNRM524/427, Solid polymer derived from unsaturated hydrocarbon monomer524/430, A single type of metal atom and only oxygen atoms DNRM, e.g., metal oxide, etc.524/445, Clay, e.g., fullers earth, fire clay, etc.524/449, Mica524/450, Metal atom other than aluminum, e.g., zeolites, etc.524/451, Talc (soapstone) DNRM524/452, Asbestos DNRM525/71, Contains two or more graft or graft-type copolymers or a graft or a graft type copolymer and at least one block or block-type copolymer525/86, Mixture contains solid polymer derived from nonaromatic reactant containing plural ethylenically unsaturated groups525/87Solid polymer other than graft or graft-type derived from nonaromatic plural ethylenically unsaturated reactantExaminersPrimary: Ives, P. C.Attorney, Agent or FirmInternational ClassesB32B 27/30 (20060101)C08J 3/20 (20060101) C08J 3/22 (20060101) C08L 25/00 (20060101) C08L 25/06 (20060101) Foreign Application Priority Data1975-10-22 CAAbstractThermoplastic polystyrene laminates are disclosed, one of the layers of which comprises a filled polystyrene composition containing from about 5 to about 50 of filler, such as calcium carbonate, clay, asbestos, etc. The filled polystyrene composition is prepared from a filled polystyrene masterbatch of impact polystyrene, filler, rubber and mineral oil, cut back by mixing with other polystyrene, either crystal or impact polystyrene. Laminates may be prepared by coextrusion. The filled polystyrene layer may be foamed. The laminates may be used for making formed articles such as cups, containers, trays, plates, sheets, etc.Field of SearchFoamed or cellular componentNext to second addition polymer from unsaturated monomers Monoolefin polymer Next to polyene polymer Including polyene monomers Of metal Sand, clay or mica (silica excluded) Next to aldehyde or ketone condensation product or addition polymer from unsaturated monomers | |
