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Class Information
Number: 521/919
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Sintered product
Description: Subject matter involving a product having voids therebetween and which products are usually formed by agglomerating or uniting particles together.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8349752 Plate brick and production method therefor Jan. 8, 2013
7758779 Reinforced resin-derived carbon foam Jul. 20, 2010
7282466 Sulfur-functionalized carbon nanoarchitectures as porous, high-surface-area supports for precious metal catalysts Oct. 16, 2007
7056455 Process for the preparation of nanostructured materials Jun. 6, 2006
6224961 Absorbent macrostructure made from mixtures of different hydrogel-forming absorbent polymers for improved fluid handling capability May. 1, 2001
6171532 Method of stabilizing sintered foam and of producing open-cell sintered foam parts Jan. 9, 2001
6136948 Sinterable semi-crystalline powder and near-fully dense article formed therewith Oct. 24, 2000
6074475 Thermosetting syntactic foams and their preparation Jun. 13, 2000
6068915 Thermosetting syntactic foams and their preparation May. 30, 2000
5990268 Sinterable semi-crystalline powder and near-fully dense article formed therewith Nov. 23, 1999
5989467 Ceramic foam precursor resin composition Nov. 23, 1999
5705538 Composition for obtaining foamed polyvinylchloride material and method of obtaining it Jan. 6, 1998
5677047 Process for producing microporous PTFE Oct. 14, 1997
5648450 Sinterable semi-crystalline powder and near-fully dense article formed therein Jul. 15, 1997
5643512 Methods for producing ceramic foams using pre-ceramic resins combined with liquid phenolic resin Jul. 1, 1997
5641442 Air- and water-permeable rubber and method for producing same Jun. 24, 1997
5527877 Sinterable semi-crystalline powder and near-fully dense article formed therewith Jun. 18, 1996
5514231 Process for producing microporous PTFE May. 7, 1996
5510176 Polytetrafluoroethylene porous film Apr. 23, 1996
5468543 Process for producing a ski coating strip made of ultra high molecular-weight polyethylene Nov. 21, 1995
5428076 Flexible, porous, absorbent, polymeric macrostructures and methods of making the same Jun. 27, 1995
5397759 Hollow porous microspheres made from dispersed particle compositions Mar. 14, 1995
5385780 Sinterable mass of polymer powder having resistance to caking and method of preparing the mass Jan. 31, 1995
5372766 Flexible, porous, absorbent, polymeric macrostructures and methods of making the same Dec. 13, 1994
5324753 Process for the preparation of foamed propylene polymer articles Jun. 28, 1994
5324561 Porous, absorbent macrostructures of bonded absorbent particles surface crosslinked with cationic amino-epichlorohydrin adducts Jun. 28, 1994
5225123 Methods for producing hollow microspheres made from dispersed particle compositions Jul. 6, 1993
5212143 Hollow porous microspheres made from dispersed particle compositions May. 18, 1993
5154866 Molding process for preparing porous polytetrafluoroethylene articles Oct. 13, 1992
5124364 Composite foams of low thermal conductivity Jun. 23, 1992
5124188 Porous, absorbent, polymeric macrostructures and methods of making the same Jun. 23, 1992
5102597 Porous, absorbent, polymeric macrostructures and methods of making the same Apr. 7, 1992
5035275 Method of controlling the pyrolysis rate of a plastic foam Jul. 30, 1991
4977196 Solid state polymerization of porous pills made by compacting polyester prepolymers Dec. 11, 1990
4957945 Preparation of ultra high molecular weight polyester Sep. 18, 1990
4942092 Extruded porous articles of polyimide and continuous preparation of the same Jul. 17, 1990
4925880 Composition and process for making porous articles from ultra high molecular weight polyethylene May. 15, 1990
4912176 Sintered polybenzimidazole/polyaryleneketone articles and method of manufacture Mar. 27, 1990
4882113 Heterogeneous elastomeric compositions containing a fluoroelastomer and PTFE and methods for manufacturing said compositions Nov. 21, 1989
4880843 Composition and process for making porous articles from ultra high molecular weight polyethylene Nov. 14, 1989
4870116 Dye-containing porous plastic element and method of making it Sep. 26, 1989
4863974 Bone growth matrix and process for making it Sep. 5, 1989
4849497 Solid state polymerization of porous pills made by compacting polyester prepolymers Jul. 18, 1989
4797243 Dye-containing porous plastic element and method of making it Jan. 10, 1989
4777154 Hollow microspheres made from dispersed particle compositions and their production Oct. 11, 1988
4772516 Stable methylpolydisilylazane polymers Sep. 20, 1988
4760102 Porous polytetrafluoroethylene material Jul. 26, 1988
4735626 Air freshener unit Apr. 5, 1988
4725392 Compression moldable aromatic polyamide powder and process for producing a compression molded article from the same Feb. 16, 1988
4716215 Compression moldable aromatic polyamide powder Dec. 29, 1987

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