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Class Information
Number: 521/174
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 > -xh reactant contains a c-x-c group
Description: Subject matter wherein the -XH reactant contains a -C-X-C group (X is a chalcogen).

Sub-classes under this class:

Class Number Class Name Patents
521/177 C-x-c reactant contains a carbocyclic ring, e.g., aromatic, etc. 70
521/175 C-x-c reactant contains a carbohydrate group 127
521/176 With non -c-x-c- containing reactant 266

Patents under this class:

Patent Number Title Of Patent Date Issued
8692030 Biobased-petrochemical hybrid polyols Apr. 8, 2014
8686058 Natural resource based viscoelastic foams Apr. 1, 2014
8673992 Polyurethane gel foams Mar. 18, 2014
8673991 Two-part curable polyurethane foam resin composition, molded article using the same, and shoe sole Mar. 18, 2014
8658709 Process for making a polyurethane foam Feb. 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
8648124 Weather-resistant polyurethane casting compounds, a process for preparation thereof and use thereof Feb. 11, 2014
8642670 Coarse-cell polyurethane elastomers Feb. 4, 2014
8623933 Process for producing polyether polyol and process for producing rigid foamed synthetic resin using same Jan. 7, 2014
8618337 Process for preparing polyether alcohols Dec. 31, 2013
8618184 Polyurethane foams containing branched poly(trimethylene ether) polyols Dec. 31, 2013
8604094 Flexible polyurethane foam and method of producing same Dec. 10, 2013
8604093 Fire-resistant polyurethane foam and fabrication method thereof Dec. 10, 2013
8598248 Flexible polyurethane foams made from alkoxylated natural oil Dec. 3, 2013
8575226 Vegetable oil-based coating and method for application Nov. 5, 2013
8557887 Process for producing rigid polyurethane foams Oct. 15, 2013
8557886 Storage-stable polyol compositions for producing rigid polyisocyanurate foam Oct. 15, 2013
8557005 Polyurethane foam and polishing pad Oct. 15, 2013
8552079 Water-blown, flame retardant rigid polyurethane foam Oct. 8, 2013
8551201 Polyurethane composition for CMP pads and method of manufacturing same Oct. 8, 2013
8541479 Low resilience flexible polyurethane foam and process for its production Sep. 24, 2013
8541478 Rigid polyurethane foam and system and method for making the same Sep. 24, 2013
8530535 Polishing pad Sep. 10, 2013
8530533 Water-blown rigid foams for the insulation of liquefied natural gas tanks Sep. 10, 2013
8524791 Process for the preparation of flexible, resilient polyurethane foam and the resulting foam Sep. 3, 2013
8513318 Method for producing a rigid polyurethane foam Aug. 20, 2013
8501828 Cure rebond binder Aug. 6, 2013
8501826 Process for the production of polyurethane products Aug. 6, 2013
8487015 Flexible polyurethane foam and process for its production Jul. 16, 2013
8481605 Rigid polyurethane foam and system and method for making the same Jul. 9, 2013
8476330 Polyurethane foam containing synergistic surfactant combinations and process for making same Jul. 2, 2013
8476329 Bioresin composition for use in forming a rigid polyurethane foam article Jul. 2, 2013
8476328 Polishing pad Jul. 2, 2013
8470902 Continuous pore elastomer and process for producing the same, and water-absorbing roller and swab Jun. 25, 2013
8466207 Method for providing a low density high strength polyurethane foam Jun. 18, 2013
8445556 Cellular elastomer compositions May. 21, 2013
8445555 Stabilized carbanions as trimerization catalysts May. 21, 2013
8426482 Method for producing viscoelastic polyurethane flexible foams Apr. 23, 2013
8404348 Resilient, water dispersible polyurethane foams and products incorporating same Mar. 26, 2013
8394868 Polyol prepolymers of natural oil based polyols Mar. 12, 2013
8389775 Process for preparing polyether alcohols Mar. 5, 2013
8389590 Process and installation for the production of foam in a continuous foaming process Mar. 5, 2013
8372893 Polyurethane foam Feb. 12, 2013
8372892 Attached, high reactivity rigid polyurethane foams Feb. 12, 2013
8367870 Autocatalytic polyols Feb. 5, 2013
8362099 Method for producing polyrethane soft foam materials Jan. 29, 2013
8362098 Process for producing viscoelastic polyurethane foams Jan. 29, 2013
8357730 Process for producing flexible polyurethane foam Jan. 22, 2013
8357729 Conductive toner supply roller, method of manufacturing supply roller, and electrostatic recording apparatus having the supply roller Jan. 22, 2013
8324289 Flexible polyurethane foam, process for its production, and seat for automobile Dec. 4, 2012

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