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Class Information
Number: 521/182
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 -c-c(=x)-x containing reactant wherein x is a chalcogen atom, e.g., phthalic acid, etc.
Description: Subject matter involving a cellular polymer derived from at least one reactant containing a-C X group (X is a chalcogen) or processes of preparing; composition containing a polymer derived from a -C X (X is a chalcogen) reactant or involving a polymerizable reactant and which composition is capable of forming a cellular product or processes of preparing same; processes of treating a cellular polymer derived from a -CX (X is a chalcogen) 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 without the addition of a material 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
521/183 Nitrogen containing reactant 151

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8691882 Organic-inorganic hybrid scaffolds with surface-immobilized nano-hydroxyapatite and preparation method thereof Apr. 8, 2014
8637583 Fiber or foil from polymers with high T.sub.g and process for their manufacture Jan. 28, 2014
8586643 Composition containing polyhydroxyalkanoate copolymer and polylactic acid used for preparing foaming material Nov. 19, 2013
8530532 Hydrogel contact lenses having improved wettability Sep. 10, 2013
8420746 Biodegradable composition and foam article made therefrom Apr. 16, 2013
8329770 Silicon-containing foams Dec. 11, 2012
8283389 Methods of manufacture of polylactic acid foams Oct. 9, 2012
8277719 Process for the preparation of auxetic foams Oct. 2, 2012
8273850 Polyester compositions from biologically-derived materials Sep. 25, 2012
8268901 Coated particulate expandable polylactic acid Sep. 18, 2012
8268905 Compositions containing poly(lactic acid), bacteriocin(s), plasticizers(s), and optionally pore forming agent(s), and methods or making Sep. 18, 2012
8148439 Foamed thermoplastic resin particles and method of producing the foamed particles Apr. 3, 2012
8093320 Compositions comprising polyphosphonates and additives that exhibit an advantageous combination of properties, and methods related thereto Jan. 10, 2012
8058321 Syntactic foam incorporating vapor-grown carbon fibers Nov. 15, 2011
7985423 Porous bodies and method of production thereof Jul. 26, 2011
7972669 Biodegradable resin foam sheet, biodegradable resin foam article and biodegradable resin molded container Jul. 5, 2011
7919540 Rigid, low density foam Apr. 5, 2011
7919539 Concentrate of polyfunctional compounds usable for the preparation of foamed polyester materials Apr. 5, 2011
7901764 Multi-layered polylactic acid resin foamed body and multi-layered polylactic acid resin foamed molded article Mar. 8, 2011
7696256 Flame retardants and flame retarded polymers Apr. 13, 2010
7674840 Isocyanate-free expandable mixtures exhibiting a fast hardening rate Mar. 9, 2010
7645810 Foamed sheet of polylactic acid resin, foam molding of polylactic acid resin and method of preparing foam molding Jan. 12, 2010
7615168 Flame retardants and flame retarded polymers Nov. 10, 2009
7361727 Copolymerization of 1,4-dioxan-2-one and a cyclic ester monomer producing thermal stabilized 1,4-dioxan-2-one (co)polymers Apr. 22, 2008
7151120 Degradable porous materials with high surface areas Dec. 19, 2006
7112417 Foam composite for the repair or regeneration of tissue Sep. 26, 2006
7056957 Formation of strong superporous hydrogels Jun. 6, 2006
7049348 Resorbable structure for treating and healing of tissue defects May. 23, 2006
6960617 Hydrogels having enhanced elasticity and mechanical strength properties Nov. 1, 2005
6867240 Porous composite materials Mar. 15, 2005
6833094 Dimensionally stable parts having good torsional stability and compositions and methods for making same Dec. 21, 2004
6797738 Open pore biodegradable matrices Sep. 28, 2004
6774208 Friction heat, cryogenic quench solid state polymerization Aug. 10, 2004
6766571 Adhesive composition comprising thermoplastic polyester and trapped gas bubbles Jul. 27, 2004
6723761 Microcellular foaming Apr. 20, 2004
6703431 Flexible open-celled microcellular polymer foams Mar. 9, 2004
6686400 Foamed and expanded beads of polyester-based resin and foam molding obtained therefrom Feb. 3, 2004
6630543 Method of making biodegradable polymer compositions Oct. 7, 2003
6596784 Strengthened thermoplastic for window coverings Jul. 22, 2003
6583189 Strengthened thermoplastic Jun. 24, 2003
6511650 Preparing porous hydrogel products Jan. 28, 2003
6486285 Water-swellable polymer gel and process for preparing the same Nov. 26, 2002
6479562 Blow-molded foamed films of polyester resin Nov. 12, 2002
6472443 Porous polymer media Oct. 29, 2002
6461732 Composites consisting of polyurethane and a thermoplastic material containing an inorganic polar additive Oct. 8, 2002
6458858 Biodegradable polyester material particles Oct. 1, 2002
6365249 Polyester resin foamed sheets Apr. 2, 2002
6339109 Method of pelletization of polymer Jan. 15, 2002
6313185 Polymers having backbones with reactive groups employed in crosslinking as precursors to nanoporous thin film structures Nov. 6, 2001
6306921 Foamed beads of polyester resin Oct. 23, 2001

1 2 3 4 5 6

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