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Class Information
Number: 521/61
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. > Process of preparing a cellular product by removal of material from a solid polymer-containing matrix without expanding the matrix; composition which is nonexpandible and is designed to form a cellular product by said process; or process of preparing said composition
Description: Subject matter wherein a cellular product is produced by removing a material from a polymeric composition containing a solid polymer and wherein removal is accomplished without the composition being expanded.

Sub-classes under this class:

Class Number Class Name Patents
521/63 Cellular product-forming process wherein the removable material is present or is produced in situ during the solid polymer formation step 311
521/62 Mixture of solid polymers present during cell formation 198
521/64 Removing a liquid to form a cellular product 654

Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8710111 Porous polymeric resins Apr. 29, 2014
8703834 Preparation of crosslinked organic porous particlesrelated applications Apr. 22, 2014
8703284 Aerogel/xerogel composite material amalgamated with single-walled carbon nanotubes for multipurpose usage Apr. 22, 2014
8691883 Aerogel-foam composites Apr. 8, 2014
8686056 Durable foam of olefin polymers, methods of making foam and articles prepared from same Apr. 1, 2014
8669002 Microporous film Mar. 11, 2014
8628673 Resin composition for pattern formation, pattern formation method and process for producing light-emitting element Jan. 14, 2014
8618183 Materials containing voids with void size controlled on the nanometer scale Dec. 31, 2013
8592496 Telechelic hybrid aerogels Nov. 26, 2013
8569391 Ordered porous mesostructured materials from nanoparticle-block copolymer self-assembly Oct. 29, 2013
8563620 High purity silica monoliths and process for the synthesis thereof Oct. 22, 2013
8557270 Interconnected porous non-degradable poly(vinyl) alcohol implant and method of manufacture Oct. 15, 2013
8487013 Production method of porous resin particle having hydroxyl group Jul. 16, 2013
8481603 Methods for making polymer beads Jul. 9, 2013
8470901 Organic aerogel and composition and method for manufacturing the organic aerogel Jun. 25, 2013
8460628 Spiro compounds Jun. 11, 2013
8436060 Organic aerogel and composition for the organic aerogel May. 7, 2013
8436061 Organic, open cell foam materials, their carbonized derivatives, and methods for producing same May. 7, 2013
8420704 Nano-structured polymer composites and process for preparing same Apr. 16, 2013
8415403 Mesoporous materials and reactants for preparing them Apr. 9, 2013
8410185 Porous polymeric materials for hydrogen storage Apr. 2, 2013
8399530 Polymer foams Mar. 19, 2013
8389589 Nanoporous media with lamellar structures Mar. 5, 2013
8388878 Method for producing microporous sheet Mar. 5, 2013
8383693 Aerogel, and composition and method for manufacturing the aerogel Feb. 26, 2013
8357728 Porous material and method of production thereof Jan. 22, 2013
8357727 Durable foam of olefin polymers, methods of making foam and articles prepared from same Jan. 22, 2013
8277719 Process for the preparation of auxetic foams Oct. 2, 2012
8268411 Materials containing voids with void size controlled on the nanometer scale Sep. 18, 2012
8247464 Method of selective foaming for porous polymeric material Aug. 21, 2012
8242182 Porous bodies and method of production thereof Aug. 14, 2012
8227518 Porous carbons Jul. 24, 2012
8222308 Porous polymer structures Jul. 17, 2012
8207236 Method for the production of porous particles Jun. 26, 2012
8193255 Porous infusible polymer parts Jun. 5, 2012
8173716 Open-cell foam modified with hydrophobines May. 8, 2012
8143322 Pump and pumping system for microfluidic lab-on-a-chip using porous structure and fabricating method thereof Mar. 27, 2012
8143337 Method of preparing a composite with disperse long fibers and nanoparticles Mar. 27, 2012
8119700 Organic aerogel, composition for forming the same, and method of preparing the same Feb. 21, 2012
8097657 Organic polymer porous material and method for producing the same Jan. 17, 2012
8080590 Porous polymeric matrices made of natural polymers and synthetic polymers and optionally at least one cation and methods of making Dec. 20, 2011
8076382 Porous polymeric materials for hydrogen storage Dec. 13, 2011
8076383 Porous resin particle having hydroxy group or primary amino group and production method thereof Dec. 13, 2011
8071657 Organic, open cell foam materials, their carbonized derivatives, and methods for producing same Dec. 6, 2011
8044108 Porous polymer blend structures Oct. 25, 2011
8022110 Porous polyimide Sep. 20, 2011
8007823 Microporous articles comprising biodegradable medical polymers, method of preparation thereof and method of use thereof Aug. 30, 2011
8003203 Resinous oil-retaining article and method for production thereof Aug. 23, 2011
7947752 Method of producing microporous high density polyethylene film 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

1 2 3 4 5 6 7

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