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Class Information
Number: 521/159
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 > N=c=x reactant having at least two c-nh-c(=x)- groups, e.g., prepolymers, etc.
Description: Subject matter wherein the -N=C=X (X is chalcogen) reactant contains at least two C-NH groups.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8673991 Two-part curable polyurethane foam resin composition, molded article using the same, and shoe sole Mar. 18, 2014
8642670 Coarse-cell polyurethane elastomers Feb. 4, 2014
8618337 Process for preparing polyether alcohols Dec. 31, 2013
8598297 Prepolymers made from hydroxymethyl-containing polyester polyols derived from fatty acids Dec. 3, 2013
8598247 Polyurethane elastomers from renewable resources Dec. 3, 2013
8592497 Process for preparing polyurethanes Nov. 26, 2013
8551201 Polyurethane composition for CMP pads and method of manufacturing same Oct. 8, 2013
8530535 Polishing pad Sep. 10, 2013
8501828 Cure rebond binder Aug. 6, 2013
8497316 Crosslinkable and foaming polyester-polyurethane (hybrid) resin moulding compositions, with foaming characteristics for closed mould applications Jul. 30, 2013
8476328 Polishing pad Jul. 2, 2013
8466207 Method for providing a low density high strength polyurethane foam Jun. 18, 2013
8465669 Monolith separation medium for chromatography and process for producing the same Jun. 18, 2013
8455101 Polyurethane lamination resin, laminate containing the polyurethane lamination resin, and skis or snowboards containing the laminate Jun. 4, 2013
8410019 Modifying agent for coating composition for producing protective layer in thermosensitive recording medium, coating composition for protective layer in thermosensitive recording medium, and th Apr. 2, 2013
8394868 Polyol prepolymers of natural oil based polyols Mar. 12, 2013
8389775 Process for preparing polyether alcohols Mar. 5, 2013
8372892 Attached, high reactivity rigid polyurethane foams Feb. 12, 2013
8349973 Thermosetting epoxy resin composition Jan. 8, 2013
8318825 Polishing pad and method of producing the same Nov. 27, 2012
8318823 Visco-elastic polyurethane foam Nov. 27, 2012
8304467 Polishing pad Nov. 6, 2012
8288448 Polyurethane polishing pad Oct. 16, 2012
8263100 Silver-containing foam structure Sep. 11, 2012
8236866 High resilience foams Aug. 7, 2012
8236868 Process for producing polyurethane elastomer foams Aug. 7, 2012
8232364 Gel masses based on polyurethane, their production and use Jul. 31, 2012
8217092 Multicomponent polyurethane/vinyl ester hybrid foam system and its use Jul. 10, 2012
8217093 Two-component polyurethane / vinyl ester hybrid foam system and its use as a flame retardant material and material for filling openings in buildings with foam Jul. 10, 2012
RE43432 Polyurethane foam composition May. 29, 2012
8183302 Visco-elastic polyurethane foam with castor oil May. 22, 2012
8178591 Carbon dioxide blown low density, flexible microcellular polyurethane elastomers May. 15, 2012
8158692 Polyurethane foam for steering wheel having improved water resistance Apr. 17, 2012
8148441 Polishing pad and manufacturing method thereof Apr. 3, 2012
8143364 Composition made from a diisocyanate and a monoamine and process for preparing it Mar. 27, 2012
8124662 Foamed polymer-inorganic binder hybrid material having controlled density and morphology, method for its preparation and uses thereof Feb. 28, 2012
8106106 Insulation boards and methods for their manufacture Jan. 31, 2012
8097657 Organic polymer porous material and method for producing the same Jan. 17, 2012
8067479 Polyurethane foam Nov. 29, 2011
8030366 Use of polyethers containing urethane for urea groups for stabilizing polyurethane foams Oct. 4, 2011
7989516 Plastic composite elements and a process for the production thereof Aug. 2, 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
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
7855240 Formulated resin component for use in spray-in-place foam system to produce a low density polyurethane foam Dec. 21, 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
7772352 Bioabsorbable and biocompatible polyurethanes and polyamides for medical devices Aug. 10, 2010

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