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Class Information
Number: 521/155
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
Description: Subject matter involving a cellular polymer derived form at least one reactant which contains a -N=C=X group (X is a chalcogen)or process of preparing; composition containing a polymer derived from a reactant containing a -N=C=X group or involving a polymerizable reactant containing a -N=C=X (X is a chalcogen)group and which composition is capable of preparing a cellular product or processes of preparing same; processes of treating a cellular polymer derived from a -N=C=X (X is a chalcogen)containing reactant with a material which neither reacts with the cellular polymer to change or modify chemical bonds therein or neither forms a desired composition with the cellular polymer or products of such a treatment; processes of treating a cellular polymer derived from a -N=C=X reactant without the addition of a material thereto whereby a physical or chemical change in the polymer may be effected or products which are the result of such a treatment.

Sub-classes under this class:

Class Number Class Name Patents
521/161 N=c=x reactant contains a heterocyclic ring 63
521/162 N=c=x reactant contains atoms other than carbon and hydrogen and other than nitrogen and chalcogen as part of the n=c=x group 66
521/159 N=c=x reactant having at least two c-nh-c(=x)- groups, e.g., prepolymers, etc. 686
521/160 Two or more n=c=x reactants 313
521/170 With -xh reactant wherein x is a chalcogen atom 759
521/157 With a c-c(=x)-xh or c-c(=x)-x-c(=x)-c- reactant wherein x is a chalcogen atom, e.g., carboxylic acid or anhydride, etc. 126
521/158 With ketone, aldehyde, or aldehyde derivative 68
521/163 With nitrogen containing reactant 467
521/168 With phosphorus containing reactant 71
521/156 With three-membered heterocyclic reactant containing two carbon atoms and a hetero atom (i.e., nitrogen or a chalcogen atom) 57

Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13

Patent Number Title Of Patent Date Issued
8691883 Aerogel-foam composites Apr. 8, 2014
8673992 Polyurethane gel foams Mar. 18, 2014
8658709 Process for making a polyurethane foam Feb. 25, 2014
8623931 Protein-containing foams, manufacture and use thereof Jan. 7, 2014
8623984 Compositions containing polyether-polysiloxane copolymers Jan. 7, 2014
8618337 Process for preparing polyether alcohols Dec. 31, 2013
8609740 Closed-loop recycled polyurethane foam, methods of manufacture and products therefrom Dec. 17, 2013
8598248 Flexible polyurethane foams made from alkoxylated natural oil Dec. 3, 2013
8598247 Polyurethane elastomers from renewable resources Dec. 3, 2013
8598245 Insulating materials comprising polysilazane, methods of forming such insulating materials, and precursor formulations comprising polysilazane Dec. 3, 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
8551611 Joint seal and method for the production thereof Oct. 8, 2013
8552079 Water-blown, flame retardant rigid polyurethane foam Oct. 8, 2013
8512642 Apparatus for producing hard polyurethane foam by froth process Aug. 20, 2013
8497316 Crosslinkable and foaming polyester-polyurethane (hybrid) resin moulding compositions, with foaming characteristics for closed mould applications Jul. 30, 2013
8487014 Silica filler pretreated with bio-based polyol and elastomer composition containing the same Jul. 16, 2013
8465669 Monolith separation medium for chromatography and process for producing the same Jun. 18, 2013
8436064 Open-cell polyurethane foam and process for its manufacture May. 7, 2013
8389775 Process for preparing polyether alcohols Mar. 5, 2013
8367870 Autocatalytic polyols Feb. 5, 2013
8357730 Process for producing flexible polyurethane foam Jan. 22, 2013
8349973 Thermosetting epoxy resin composition Jan. 8, 2013
8338355 Azeotrope or azeotrope-like composition comprising 1,1,2,2-tetrafluoro-1-methoxyethane Dec. 25, 2012
8318829 Methylene bis(cyclohexylamine)-initiated polyols and rigid polyurethane foam made therefrom Nov. 27, 2012
8318828 1,3- or 1,4-bis(aminomethyl)cyclohexane-initiated polyols and rigid polyurethane foam made therefrom Nov. 27, 2012
8318820 Degradable polyurethane foams Nov. 27, 2012
8282851 Anisotropic cellular elastomers Oct. 9, 2012
8277719 Process for the preparation of auxetic foams Oct. 2, 2012
8247466 Variable felted polyurethane foams for sponges and wipes Aug. 21, 2012
8217094 Monolith separation medium for chromatographic use and method of producing the same Jul. 10, 2012
8193257 Amine-initiated polyols and rigid polyurethane foam made therefrom Jun. 5, 2012
8188029 Hydrophilic polyurethane foam articles comprising an antimicrobial compound May. 29, 2012
8188156 Polyol composition, foaming composition and polyurethane foam May. 29, 2012
8129457 Flame retardant blends for flexible polyurethane foam Mar. 6, 2012
8124663 Foamed isocyanate-based polymer having improved hardness properties and process for production thereof Feb. 28, 2012
8124662 Foamed polymer-inorganic binder hybrid material having controlled density and morphology, method for its preparation and uses thereof Feb. 28, 2012
8114519 Derivatized solid epoxy resin and uses thereof Feb. 14, 2012
8097660 Rigid polyurethane foams with low thermal conductivity and a process for their production Jan. 17, 2012
8097657 Organic polymer porous material and method for producing the same Jan. 17, 2012
8093320 Compositions comprising polyphosphonates and additives that exhibit an advantageous combination of properties, and methods related thereto Jan. 10, 2012
8053484 Composition for polyurethane foam and polyurethane foam prepared therefrom Nov. 8, 2011
8022110 Porous polyimide Sep. 20, 2011
7985423 Porous bodies and method of production thereof Jul. 26, 2011
7947756 Process for making visco-elastic foams May. 24, 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
7879922 Rigid, closed-cell, graft-polymer foam; rigid flexible cellular foam; rigid flexible cellular foam mixtures; and method for manufacturing a rigid, closed-cell, graft-polymer foam Feb. 1, 2011
7799874 Catalytic compositions Sep. 21, 2010
7776955 Polyurethane-graphite oxide composite material, method for its preparation and its use as a flame retardant and as a fire-proof seal Aug. 17, 2010

1 2 3 4 5 6 7 8 9 10 11 12 13

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