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Class Information
Number: 521/134
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > Cellular products or processes of preparing a cellular product, e.g., foams, pores, channels, etc. > Cellular product derived from two or more solid polymers or from at least one solid polymer and at least one polymer-forming system
Description: Subject matter involving a cellular product derived from mixed solid polymers or from a solid polymer and at least one polymer-forming system or process of preparing such a cellular product; compositions containing mixed solid polymers or a solid polymer and a polymer-forming system or processes of preparing and which are capable of forming a cellular product; processes of treating a cellular product derived from mixed solid polymers or from a solid polymer and a polymer-forming system with a material which neither reacts with the cellular product to change or modify chemical bonds therein or neither forms a desired composition with the cellular product or products of such a treatment; processes of treating a cellular product derived from mixed solid polymers or from a solid polymer and a polymer-forming system without the addition of a material thereto whereby a physical or chemical change in the cellular product may be effected or products which are the result of such a treatment.










Sub-classes under this class:

Class Number Class Name Patents
521/137 At least one polymer is derived from a -n=c=x reactant wherein x is a chalcogen atom or wherein the polymer-forming system contains the same type of reactant 751
521/138 At least one polymer is derived from a polycarboxylic acid or derivative and a polyol or wherein the polymer-forming system containing the same type of reactants 314
521/136 At least one polymer is derived from an aldehyde or derivative or wherein the polymer-forming system contains the same type of reactant 180
521/139 At least one polymer is derived from an ethylenically unsaturated aromatic reactant or wherein the polymer-forming system contains the same type of reactant 579
521/140 At least one polymer is derived from reactant containing two or more ethylenic groups or wherein the polymer-forming system contains the same type of reactant 333
521/135 At least one polymer is derived from reactant containing two or more three membered heterocyclic rings having two carbon atoms and one chalcogen atom or polymer-forming system contains the same type of reactant 132


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
8691046 Energy-activated room temperature-pumpable polymer compositions and devices for activating and dispensing the same Apr. 8, 2014
8691883 Aerogel-foam composites Apr. 8, 2014
8691884 Crosslinked flame retardant thermoplastic elastomer gels Apr. 8, 2014
8686056 Durable foam of olefin polymers, methods of making foam and articles prepared from same Apr. 1, 2014
8664286 Vibration damping composition Mar. 4, 2014
8658707 Expandable functional TFE copolymer fine powder, the expanded functional products obtained therefrom and reaction of the expanded products Feb. 25, 2014
8642668 Polymer-dispersed polyol and process for producing flexible polyurethane foam Feb. 4, 2014
8629194 Formed article and process for the production thereof Jan. 14, 2014
8623932 Foamed polyolefin composition Jan. 7, 2014
8603681 Porous film material comprising at least one carbonaceous semimetal oxide phase, and use thereof as a separator material for electrochemical cells Dec. 10, 2013
8604094 Flexible polyurethane foam and method of producing same Dec. 10, 2013
8598241 Polypropylene resin pre-foamed particle and method for producing same, and polypropylene resin in-mold foaming molded article Dec. 3, 2013
8598242 Expanded polypropylene copolymer resin particles Dec. 3, 2013
8586643 Composition containing polyhydroxyalkanoate copolymer and polylactic acid used for preparing foaming material Nov. 19, 2013
8557885 Extruded thermoplastic resin foam Oct. 15, 2013
8546456 Fracture fixation systems Oct. 1, 2013
8546489 Polymer blend compositions Oct. 1, 2013
8536241 (Meth)acryloyl pressure-sensitive foam adhesives Sep. 17, 2013
8519049 Curable composition Aug. 27, 2013
8470951 Silicone composition suitable for cross-linking by dehydrocondensation in the presence of a metal catalyst Jun. 25, 2013
8461221 Silicone antifoam particles Jun. 11, 2013
8420746 Biodegradable composition and foam article made therefrom Apr. 16, 2013
8420707 Biomass composite composition and foaming method thereof Apr. 16, 2013
8404756 Foamable fluoropolymer composition Mar. 26, 2013
8399531 Foamable composition Mar. 19, 2013
8389589 Nanoporous media with lamellar structures Mar. 5, 2013
8378001 Polystyrene/polyethylene oxide copolymer for enhancing water vapor permeability in thermoplastic foam Feb. 19, 2013
8357727 Durable foam of olefin polymers, methods of making foam and articles prepared from same Jan. 22, 2013
8349909 Polystyrene/polyethylene oxide copolymer cell size enlarger for foam Jan. 8, 2013
8344037 Resin composition for cross-linked foam molding, cross-linked foam molded article, and method for production of cross-linked foam molded article Jan. 1, 2013
8318821 Rigid foamed synthetic resin and process for its production Nov. 27, 2012
8318863 Foaming polypropylene resin composition and process for producing injection-molded foams from the composition Nov. 27, 2012
8318823 Visco-elastic polyurethane foam Nov. 27, 2012
8309256 Microporous film and method for producing the same Nov. 13, 2012
8298465 Microporous film and method for producing the same Oct. 30, 2012
8293807 Method for the production of rigid polyurethane foam Oct. 23, 2012
8277719 Process for the preparation of auxetic foams Oct. 2, 2012
8263673 Closed-cell foamed rubber sheet, and method for production thereof Sep. 11, 2012
8242183 Brominated polymers as FR additives and polymer systems containing same Aug. 14, 2012
8211952 Curable sealing method and foamed composition Jul. 3, 2012
8211953 Polyolefin resin foam and process for production thereof Jul. 3, 2012
8178592 Foamable fluoropolymer composition May. 15, 2012
8173715 Polyurethane resin moulding for vehicle interior part and method of manufacturing the same May. 8, 2012
8133929 Method for incorporating long glass fibers into epoxy-based reinforcing resins Mar. 13, 2012
8124664 Flexible acrylic foam composition Feb. 28, 2012
8106121 Graft polyols with a bimodal particle size distribution and method for producing graft polyols of this type, in addition to the use thereof for producing polyurethanes Jan. 31, 2012
8097274 Skin substitutes, preparation methods and uses thereof Jan. 17, 2012
8039523 Resin composition for press foaming, foam and process for producing the foam Oct. 18, 2011
8026292 Cyanate-based, carbon-dioxide-filled structured foams and method for their production Sep. 27, 2011
8008398 Foamable polymeric compositions and articles containing foamed compositions Aug. 30, 2011

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