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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
6809124 Method for the production block foam Oct. 26, 2004
6802997 Method of manufacturing rigid polyurethane foam material, method of manufacturing refrigerator, and refrigerator Oct. 12, 2004
6803390 Rigid polyurethane foams Oct. 12, 2004
6797736 Method of forming high resilience slabstock polyurethane foam Sep. 28, 2004
6794420 Methods of producing stable novel black polyurethane articles with polymeric colorants Sep. 21, 2004
6790871 Isocyanate-based polymer foam and process for production thereof Sep. 14, 2004
6790820 Compositions of hydrofluorocarbons and trans-1,2-dichloroethylene Sep. 14, 2004
6787580 Water-free preparation process for multimodal thermoplastic polymer foam and foam therefrom Sep. 7, 2004
6787575 Method for processing a mineral fillers with a phosphate, said fillers and their uses Sep. 7, 2004
6784220 Polyurethane foam Aug. 31, 2004
6784219 Polyurethane cast elastomers based on durene diisocyanate Aug. 31, 2004
6784150 Composition of pentafluoropropane, pentafluoropropane and water Aug. 31, 2004
6784218 Method of forming high resilience slabstock polyurethane foam displaying latex-like characteristics Aug. 31, 2004
6777382 Compositions of hydrofluorocarbons and methanol Aug. 17, 2004
6776925 Process for the preparation of polyether polyols Aug. 17, 2004
6777455 Process for producing polyurethane foam Aug. 17, 2004
6777456 Method for producing a rigid polyurethane foam Aug. 17, 2004
6777457 Isocyanate-based polymer foam and process for production thereof Aug. 17, 2004
6767932 Method and apparatus for producing discretely striped multi-property foam Jul. 27, 2004
6767929 Process for producing polyurethane Jul. 27, 2004
6765031 Micropore open cell foam composite and method for manufacturing same Jul. 20, 2004
6765032 Treated mineral fillers suspensions of these fillers in polyols and their uses in polyurethane foams Jul. 20, 2004
6765034 Flame-resistant and sound- and vibration-insulating member for vehicles, and process of manufacturing the same Jul. 20, 2004
6765035 Process for making rigid and flexible polyurethane foams containing a fire-retardant Jul. 20, 2004
6762211 Tertiary amino alkyl amide polyurethane catalysts derived from long chain alkyl and fatty carboxylic acids Jul. 13, 2004
6759363 Activators for the production of polyurethane foams Jul. 6, 2004
6759443 Polyurethane foam composition and additive useful in shoe sole applications and methods of making same Jul. 6, 2004
6759444 Integral skin foams employing pentafluorobutane blowing agents Jul. 6, 2004
6759448 Flexible polyurethane foam, its production method and material system for its production Jul. 6, 2004
6759447 Physical properties of polyurethane foams using tertiary amino alkyl amide catalysts Jul. 6, 2004
6756415 Flexible polyurethane foam and method for its production Jun. 29, 2004
6753357 Rigid foam compositions and method employing methyl formate as a blowing agent Jun. 22, 2004
6747068 Hydrophobic polyurethane foam Jun. 8, 2004
6747069 Tertiary alkanolamine polyurethane catalysts derived from long chain alkyl and fatty carboxylic acids Jun. 8, 2004
6737446 Tertiary amino alkyl amide catalysts for improving the physical properties of polyurethane foams May. 18, 2004
6734220 Fine cell, high density viscoelastic polyurethane foams May. 11, 2004
6734219 Flexible polyurethane foam and method for its production May. 11, 2004
6727290 Process of making rigid polyurethane foam Apr. 27, 2004
6727292 Manufacture of MDI-TDI based flexible polyurethane foams Apr. 27, 2004
6716890 Polyurethane foams with fine cell size Apr. 6, 2004
6713522 Peelable foam coating composition Mar. 30, 2004
6713521 Method of preparing rigid polyurethane foam and composition of rigid polyurethane foam Mar. 30, 2004
6706776 Syntactic foams with improved water resistance, long pot life and short demolding times Mar. 16, 2004
6706775 Polyurethane foam products with controlled release of agents and additives Mar. 16, 2004
6699917 Low impact resilience polyurethane form that contains carbon powder, and producing thereof Mar. 2, 2004
6699916 Rigid hybrid polyurethane foams Mar. 2, 2004
6696505 Preparation of polyurethane foams Feb. 24, 2004
6689822 Azeotrope-like compositions of pentafluoropropane and water Feb. 10, 2004
6673848 Process for manufacturing a tire safety support and support obtained by this process Jan. 6, 2004
6670406 Process for producing polyether polyols Dec. 30, 2003

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