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Class Information
Number: 521/109
Name: Synthetic resins or natural rubbers -- part of the class 520 series >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
521/	Synthetic resins (class 520, subclass 1)	0
521/901	Cellular polymer containing a carbodiimide structure	61
521/902	Cellular polymer containing an isocyanurate structure	293
521/903	Cellular polymer having reduced smoke or gas generation	55
521/904	Polyurethane cellular product having high resiliency or cold cure property	86
521/905	Hydrophilic or hydrophobic cellular product	181
521/906	Polyurethane cellular product containing unreacted flame-retardant material	174
521/907	Nonurethane flameproofed cellular product	212
521/908	Nucleating agent for cellular product	55
521/909	Blowing-agent moderator, e.g., kickers, etc.	65
521/910	Plural blowing agents for producing nonpolyurethane cellular products	134
521/911	Surfactant for other than polyurethane cellular product	24
521/912	Separated reactive materials utilized in preparing cellular product	8
521/913	Cell forming in absence of external heat	11
521/914	Polyurethane cellular product formed from a polyol which has been derived from at least two 1,2 epoxides as reactants	121
521/915	Utilizing electrical or wave energy during cell forming process	63
521/916	Cellular product having enhanced degradability	34
521/917	Specialized mixing apparatus utilized in cell forming process	97
521/918	Physical aftertreatment of a cellular product	167
521/919	Sintered product	68
521/920	Cellular product containing a dye or pigment	19
521/921	Preparing a nonpolyurethane cellular particle from a nonparticulate material	18