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Class Information
Number: 521/172
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 group, e.g., carboxylic acid ester, etc.
Description: Subject matter wherein XH reactant contains a (X is a chalcogen atom) group.










Sub-classes under this class:

Class Number Class Name Patents
521/173 With non -c=x containing reactant 324


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11

Patent Number Title Of Patent Date Issued
8686057 Polyurethanes made from hydroxy-methyl containing fatty acids or alkyl esters of such fatty acids Apr. 1, 2014
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
8637584 Polyester polyol-containing polyurethane systems having improved hydrolytic stability Jan. 28, 2014
8633257 Bio-based foam from natural oils Jan. 21, 2014
8629195 Production of polyurethane foams Jan. 14, 2014
8618337 Process for preparing polyether alcohols Dec. 31, 2013
8604093 Fire-resistant polyurethane foam and fabrication method thereof Dec. 10, 2013
8598247 Polyurethane elastomers from renewable resources Dec. 3, 2013
8598253 Polypropylene carbonate paint composition Dec. 3, 2013
8598297 Prepolymers made from hydroxymethyl-containing polyester polyols derived from fatty acids Dec. 3, 2013
8575226 Vegetable oil-based coating and method for application Nov. 5, 2013
8557005 Polyurethane foam and polishing pad Oct. 15, 2013
8557886 Storage-stable polyol compositions for producing rigid polyisocyanurate foam Oct. 15, 2013
8557887 Process for producing rigid polyurethane foams Oct. 15, 2013
8551201 Polyurethane composition for CMP pads and method of manufacturing same Oct. 8, 2013
8552080 Polyurethane foams Oct. 8, 2013
8552079 Water-blown, flame retardant rigid polyurethane foam Oct. 8, 2013
8530535 Polishing pad Sep. 10, 2013
8497316 Crosslinkable and foaming polyester-polyurethane (hybrid) resin moulding compositions, with foaming characteristics for closed mould applications Jul. 30, 2013
8481606 Process for the production of polyester polyols with low volumes of dioxane waste Jul. 9, 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
8426482 Method for producing viscoelastic polyurethane flexible foams Apr. 23, 2013
8389775 Process for preparing polyether alcohols Mar. 5, 2013
8357729 Conductive toner supply roller, method of manufacturing supply roller, and electrostatic recording apparatus having the supply roller Jan. 22, 2013
8334035 Polyester polyols from terephthalic acid and oligoalkylene oxides Dec. 18, 2012
8318827 Insect resistant polyurethane foam Nov. 27, 2012
8318822 Vibration damping and sound absorbing material and production process thereof Nov. 27, 2012
8318821 Rigid foamed synthetic resin and process for its production Nov. 27, 2012
8304467 Polishing pad Nov. 6, 2012
8299136 Polyurethane composite materials Oct. 30, 2012
8293808 Flexible polyurethane foams prepared using modified vegetable oil-based polyols Oct. 23, 2012
8288448 Polyurethane polishing pad Oct. 16, 2012
8283389 Methods of manufacture of polylactic acid foams Oct. 9, 2012
8247466 Variable felted polyurethane foams for sponges and wipes Aug. 21, 2012
8247467 Process for producing flexible polyurethane foams Aug. 21, 2012
8236866 High resilience 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
8188156 Polyol composition, foaming composition and polyurethane foam May. 29, 2012
8182909 Energy absorbing padding for sports application May. 22, 2012
8178591 Carbon dioxide blown low density, flexible microcellular polyurethane elastomers May. 15, 2012
8178593 Urethane formulation May. 15, 2012
8173719 Polyurethane foam, method for the production and use thereof May. 8, 2012
8148440 Process for making rigid urethane-modified polyisocyanurate foams Apr. 3, 2012
8148437 Integral polyurethane foams comprising dialkyl cyclohexanedicarboxylates as internal mold release agent Apr. 3, 2012

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