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Class Information
Number: 521/82
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. > Process of forming a cellular product subsequent to solid polymer formation in the presence of a stated ingredient, noncellular composition capable of forming a cellular product and containing a stated ingredient, or process of preparing same
Description: Subject matter wherein cells are formed subsequent to the formation of a solid polymer and wherein the cell formation is performed in the presence of a stated ingredient.










Sub-classes under this class:

Class Number Class Name Patents
521/85 Ingredient contains a boron or phosphorus atom 265
521/97 Ingredient contains a carbon atom double-bonded to oxygen, e.g., carbon dioxide, carboxylic acid, etc. 385
521/92 Ingredient contains a metal atom 465
521/91 Ingredient contains a silicon atom 316
521/89 Ingredient contains a sulfur atom 218
521/96 Ingredient contains an -o-o- group 142
521/98 Ingredient contains only c and h atoms, only c and halogen atoms, or only c, h, and halogen atoms 484
521/90 Ingredient is a heterocyclic compound 154
521/94 Ingredient is a nitrogen containing compound 292
521/87 Ingredient is aldehyde or ketone 58
521/83 Ingredient is asphaltic, bituminous, or water settable inorganic material, e.g., cement, plaster of paris, etc. 119
521/88 Ingredient is ether, alcohol, or inorganic alcoholate, e.g., phenol, etc. 364
521/86 Ingredient is organic silicon compound 93
521/84.1 Ingredient is protein, carbohydrate, or natural resin 284


Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8703863 Polyimide precursor, polyimide, and coating solution for under layer film for image formation Apr. 22, 2014
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
8680168 Method for filling wall cavities with expanding foam insulation Mar. 25, 2014
8629194 Formed article and process for the production thereof Jan. 14, 2014
8629192 Method for the production of high internal phase emulsion foams using ultraviolet light Jan. 14, 2014
8623930 Thermoplastic resin foam, method of producing the same, and light reflecting material thereof Jan. 7, 2014
8623932 Foamed polyolefin composition Jan. 7, 2014
RE44682 Fluoropolymer foams, process to make them and applications thereof Dec. 31, 2013
8569062 Cryogels of PVA-boronic acid containing co-polymers for cell culture Oct. 29, 2013
8546456 Fracture fixation systems Oct. 1, 2013
8524790 Starch film and method for manufacturing starch foam Sep. 3, 2013
8507568 Suspension polymerization and foaming of water containing activated carbon-nano/microparticulate polymer composites Aug. 13, 2013
8492446 Enhanced process for the production of expanded PVC and plastic materials based on expanded PVC obtained therewith Jul. 23, 2013
8415411 Filler composition Apr. 9, 2013
8389588 Bi-phasic compressed porous reinforcement materials suitable for implant Mar. 5, 2013
8378001 Polystyrene/polyethylene oxide copolymer for enhancing water vapor permeability in thermoplastic foam Feb. 19, 2013
8349909 Polystyrene/polyethylene oxide copolymer cell size enlarger for foam Jan. 8, 2013
8324287 Positive skew styrene-acrylonitrile copolymer foam Dec. 4, 2012
8318819 Compositions for compounding foamable, fluropolymer pellets for use in melt processing cellular or foamed fluoropolymer applications Nov. 27, 2012
8304466 Composite resin Nov. 6, 2012
8283390 Siloxane block copolymer nanoporous foams, methods of manufacture thereof and articles comprising the same Oct. 9, 2012
8277719 Process for the preparation of auxetic foams Oct. 2, 2012
8278366 Compositions for compounding, extrusion and melt processing of foamable and cellular fluoropolymers Oct. 2, 2012
8227547 Foamable thermoplastic reactor blends and foam article therefrom Jul. 24, 2012
8193397 Hydrofluoroether compounds and processes for their preparation and use Jun. 5, 2012
8173714 Expanded styrene polymers having a reduced thermal conductivity May. 8, 2012
8142695 Foam of polymers Mar. 27, 2012
8143323 Polyurethane foam for vehicle and method for manufacturing the same Mar. 27, 2012
8097274 Skin substitutes, preparation methods and uses thereof Jan. 17, 2012
8093308 Styrenic polymer compositions and methods of making and using same Jan. 10, 2012
8080589 Method for producing a bio-based polymeric shoe component Dec. 20, 2011
8080592 Extruded polymer foams containing brominated fatty acid-based flame retardant additives Dec. 20, 2011
8080596 Biodegradable plastic material and method for producing the same Dec. 20, 2011
8076380 Particulate expandable polystyrene (EPS), process for making particulate expandable polystyrene, as well as a particular application of polystyrene foam material Dec. 13, 2011
8071816 Hydrofluoroacetal compounds and processes for their preparation and use Dec. 6, 2011
8058321 Syntactic foam incorporating vapor-grown carbon fibers Nov. 15, 2011
7968613 Compositions for compounding, extrusion and melt processing of foamable and cellular fluoropolymers Jun. 28, 2011
7943676 Method of recycling waste plastic foam materials May. 17, 2011
7875656 Foamable sealant composition Jan. 25, 2011
7862749 Flame retardant polyurethanes and additives therefor Jan. 4, 2011
7863342 Fire resistant materials Jan. 4, 2011
7855239 Extruded propylene resin foam Dec. 21, 2010
7846987 Expanded and extruded biodegradable and reduced emission foams made with methyl formate-based blowing agents Dec. 7, 2010
7842735 Fluoropolymer foams, process to make them and applications thereof Nov. 30, 2010
7811502 Aqueous release agent and its use in the production of polyurethane moldings Oct. 12, 2010
7803849 Acrylic resin expanded beads, acrylic resin expandable beads, and method for manufacturing foamed molded article of acrylic resin expanded beads Sep. 28, 2010
7772294 Fire resistant materials Aug. 10, 2010
7743567 Fiberglass/cellulosic composite and method for molding Jun. 29, 2010
7736743 Heat curable, thermally expandable composition with high degree of expansion Jun. 15, 2010

1 2 3 4 5 6 7










 
 
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