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Class Information
Number: 521/170
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 a -n=c=x containing reactant wherein x is a chalcogen atom > With -xh reactant wherein x is a chalcogen atom
Description: Subject matter wherein a -XH (X is a chalcogen containing material) is reacted with a -N=C=X containing material.










Sub-classes under this class:

Class Number Class Name Patents
521/174 -xh reactant contains a c-x-c group 1,057
521/172 -xh reactant contains a c=x group, e.g., carboxylic acid ester, etc. 540
521/171 -xh reactant contains a halogen atom 82


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
8093309 Light colored foam for use in marine applications Jan. 10, 2012
8076385 Use of flame retardant aqueous liquid composition in making flame retardant polyurethane foam article Dec. 13, 2011
8067476 Foamed thermoplastic polyurethanes Nov. 29, 2011
8067480 Porous polyisocyanate polyaddition products Nov. 29, 2011
8063113 Polyurethane foam-forming compositions containing polysilsesquioxane cell opening agents Nov. 22, 2011
8058322 Flame-retardant flexible polyurethane foam Nov. 15, 2011
8053484 Composition for polyurethane foam and polyurethane foam prepared therefrom Nov. 8, 2011
8053485 Polyurethane foam Nov. 8, 2011
8044109 Polyurethane foams containing silicone surfactants Oct. 25, 2011
8034848 Use of low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solutions containing polyethersiloxanes in the production of hot-cure flexible polyurethane foams Oct. 11, 2011
8030366 Use of polyethers containing urethane for urea groups for stabilizing polyurethane foams Oct. 4, 2011
8017663 Modified asphaltic foam materials Sep. 13, 2011
8017664 Process for preparing polymer polyols Sep. 13, 2011
7989516 Plastic composite elements and a process for the production thereof Aug. 2, 2011
7985468 Foam ear plug or earpiece utilizing recycled pulverized polyurethane foam Jul. 26, 2011
7985779 Manufacture of polyurethane foam ball Jul. 26, 2011
7985780 Cylindrical mouldings based on cellular polyurethane elastomers Jul. 26, 2011
7964653 Polyol composition for two-component curable abrasive foam, composition for two-component curable abrasive foam, abrasive foam, and method for producing abrasive foam Jun. 21, 2011
7947755 Polyurethane foam and method of manufacturing the same May. 24, 2011
7947756 Process for making visco-elastic foams May. 24, 2011
7943679 Method of molding rigid polyurethane foams with enhanced thermal conductivity May. 17, 2011
7943678 Method for the preparation of new segmented polyurethanes with high tear and tensile strengths and method for making porous scaffolds May. 17, 2011
7939574 Foamed isocyanate-based polymer having improved hardness properties and process for production thereof May. 10, 2011
7893124 Method for producing rigid polyurethane foams Feb. 22, 2011
7875657 Trans-1,2 dichloroethylene composition Jan. 25, 2011
7872055 Catalyst composition for water blown, low density, rigid polyurethane foam Jan. 18, 2011
7855240 Formulated resin component for use in spray-in-place foam system to produce a low density polyurethane foam Dec. 21, 2010
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
7795322 Prepolymers and cellular polyisocyanate polyaddition products produced therefrom Sep. 14, 2010
7790778 Prepolymer, polyol composition and process for making a flexible foam Sep. 7, 2010
7776934 One-component polyurethane foam compositions and methods for their use Aug. 17, 2010
7750058 Process for preparing closed-cell water-blown rigid polyurethane foams having improved mechanical properties Jul. 6, 2010
7749599 Cushioning material for a polishing pad Jul. 6, 2010
7750191 Method for producing polyether alcohols Jul. 6, 2010
7737192 Process for producing flexible polyurethane foam Jun. 15, 2010
7718102 Froth and method of producing froth May. 18, 2010
7714030 Attached, high reactivity rigid polyurethane foams containing oxazolidone groups May. 11, 2010
7709543 Flammable blowing agent control and blend systems for PUR/PIR foam May. 4, 2010
7700661 Prime foam containing vegetable oil polyol Apr. 20, 2010
7691913 Rigid polyurethane foam based on toluene diamine-initiated polyols Apr. 6, 2010
7691914 Polyurethane foams comprising oligomeric polyols Apr. 6, 2010
7678840 Reduction of MDI emissions in cavity filling NVH polyurethane foams Mar. 16, 2010
7670501 Carbon dioxide blown low density, flexible microcellular polyurethane elastomers Mar. 2, 2010
7671103 Use of block polyethersiloxanes as stabilizers in polyurethane foams Mar. 2, 2010
7671104 Fine cell, water-blown rigid polyurethane foams Mar. 2, 2010
7635723 Rigid foam compositions and methods employing alkyl alkanoates as a blowing agent Dec. 22, 2009
7622542 Plastic moldings from optionally filled polyurethanes and their use Nov. 24, 2009
7612120 Insulation boards and methods for their manufacture Nov. 3, 2009
H2233 Catalysts which stabilize hydrofluorocarbon blowing agents in polyurethane foam compositions Nov. 3, 2009

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