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Class Information
Number: 521/131
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 formation prior to or during solid polymer formation in the presence of a stated ingredient other than water > Ingredient contains only carbon and hydrogen atoms, only c and halogen atoms, or only c, h, and halogen atoms
Description: Subject matter wherein the stated ingredient contains (1) only carbon and hydrogen atoms, or (2) only carbon, hydrogen, and halogen atoms, or (3) only carbon and halogen atoms.










Sub-classes under this class:

Class Number Class Name Patents
521/132 Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc. 110


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
8680168 Method for filling wall cavities with expanding foam insulation Mar. 25, 2014
8658708 Foam-forming compositions containing azeotropic or azeotrope-like mixtures containing Z-1,1,1,4,4,4-hexafluoro-2-butene and methyl formate and their uses in the preparation of polyisocyanate-b Feb. 25, 2014
8642669 Foamable low-viscosity mixtures Feb. 4, 2014
8628681 Heat transfer compositions Jan. 14, 2014
8618183 Materials containing voids with void size controlled on the nanometer scale Dec. 31, 2013
8541478 Rigid polyurethane foam and system and method for making the same Sep. 24, 2013
8530533 Water-blown rigid foams for the insulation of liquefied natural gas tanks Sep. 10, 2013
8513318 Method for producing a rigid polyurethane foam Aug. 20, 2013
8481605 Rigid polyurethane foam and system and method for making the same Jul. 9, 2013
8466207 Method for providing a low density high strength polyurethane foam Jun. 18, 2013
8445555 Stabilized carbanions as trimerization catalysts May. 21, 2013
8445556 Cellular elastomer compositions May. 21, 2013
8382945 Expandable microspheres and methods of making and using the same Feb. 26, 2013
8329770 Silicon-containing foams Dec. 11, 2012
8324289 Flexible polyurethane foam, process for its production, and seat for automobile Dec. 4, 2012
8318821 Rigid foamed synthetic resin and process for its production Nov. 27, 2012
8318827 Insect resistant polyurethane foam Nov. 27, 2012
8314159 Blowing agent composition of hydrochlorofluoroolefin Nov. 20, 2012
8299137 Compositions and use of cis-1,1,1,4,4,4-hexafluoro-2-butene foam-forming composition in the preparation of polyisocyanate-based forms Oct. 30, 2012
8299138 Process for producing flexible polyurethane foam Oct. 30, 2012
8293807 Method for the production of rigid polyurethane foam Oct. 23, 2012
8268411 Materials containing voids with void size controlled on the nanometer scale Sep. 18, 2012
8258196 Method for producing rigid polyurethane foam, and rigid polyurethane foam Sep. 4, 2012
8148440 Process for making rigid urethane-modified polyisocyanurate foams Apr. 3, 2012
8148441 Polishing pad and manufacturing method thereof Apr. 3, 2012
8133930 Polyurethane foams made from hydroxymethyl-containing polyester polyols Mar. 13, 2012
8106106 Insulation boards and methods for their manufacture Jan. 31, 2012
8101671 Polyolefin resin foam and the process for producing the same Jan. 24, 2012
8101672 Azeotrope-like compositions of 1,1,2,3,3-pentafluoropropene Jan. 24, 2012
8097659 Flexible polyurethane foam and a method of producing the same Jan. 17, 2012
8076384 Free radical post-crosslinked adsorbent and method of preparation Dec. 13, 2011
8048935 Liquid foam systems and ASTM E-84 class 1 rated rigid, high-density polyurethane foams and articles prepared therefrom Nov. 1, 2011
8017663 Modified asphaltic foam materials Sep. 13, 2011
8008362 Nanoporous polymer foams of polycondensation reactive resins Aug. 30, 2011
8003708 Process for making rigid polyurethane foams Aug. 23, 2011
7985780 Cylindrical mouldings based on cellular polyurethane elastomers Jul. 26, 2011
7985779 Manufacture of polyurethane foam ball Jul. 26, 2011
7943679 Method of molding rigid polyurethane foams with enhanced thermal conductivity May. 17, 2011
7914696 Heat transfer compositions Mar. 29, 2011
7897652 Polyurethane composition useful as shock absorbers and a method for their preparation Mar. 1, 2011
7893124 Method for producing rigid polyurethane foams Feb. 22, 2011
7893123 Method for the production of expanded polymeric materials and expanded polymeric material obtained by the method Feb. 22, 2011
7875658 Expansible mixtures devoid of isocyanates exhibiting improved fire behaviour Jan. 25, 2011
7875657 Trans-1,2 dichloroethylene composition Jan. 25, 2011
7838568 Insulation boards and methods for their manufacture Nov. 23, 2010
7825166 Flexible polyurethane foam, process for its production, and seat for automobile using the flexible polyurethane foam Nov. 2, 2010
7776934 One-component polyurethane foam compositions and methods for their use Aug. 17, 2010
7759403 Flexible polyurethane foam, process for its production, and seat for automobile using the flexible polyurethane foam Jul. 20, 2010
7709543 Flammable blowing agent control and blend systems for PUR/PIR foam May. 4, 2010
7691913 Rigid polyurethane foam based on toluene diamine-initiated polyols Apr. 6, 2010

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