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Class Information
Number: 521/81
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. > Extruding a solid polymer containing material to form a cellular product > System contains a mixture of solid polymer or at least one solid polymer and at least one solid polymer-forming system
Description: Subject matter wherein a mixture of polymers or polymer-forming ingredients is employed during the extrusion step.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7358282 |
Low-density, open-cell, soft, flexible, thermoplastic, absorbent foam and method of making foam |
Apr. 15, 2008 |
| 7285315 |
Closure in synthetic material for containers |
Oct. 23, 2007 |
| 7173069 |
Polyolefin foams and methods of making the same |
Feb. 6, 2007 |
| 7173070 |
Foam cushion and method of making and using the same |
Feb. 6, 2007 |
| 7166646 |
Asphalt-filled polymer foams |
Jan. 23, 2007 |
| 7160929 |
Nanocomposite and molecular-composite polymer foams and method for their production |
Jan. 9, 2007 |
| 7144925 |
Fire resistance acoustic foam |
Dec. 5, 2006 |
| 6958365 |
Manufacturing process for open celled microcellular foam |
Oct. 25, 2005 |
| 6956068 |
Microcellular foam dielectric for use in transmission lines |
Oct. 18, 2005 |
| 6908950 |
Asphalt filled polymer foam |
Jun. 21, 2005 |
| 6884823 |
Injection molding of polymeric material |
Apr. 26, 2005 |
| 6841581 |
Extruded styrene resin foam and process for producing the same |
Jan. 11, 2005 |
| 6770683 |
Foam comprising a blend of ethylene/styrene interpolymer and polyethylene |
Aug. 3, 2004 |
| 6767931 |
Foam compositions from blend of alkenyl aromatic polymers and alpha-olefin/vinyl or vinylidene aromatic interpolymers |
Jul. 27, 2004 |
| 6727291 |
Preparation of expandable propylene polymer beads |
Apr. 27, 2004 |
| 6720363 |
Preparation of a macrocellular acoustic foam |
Apr. 13, 2004 |
| 6720362 |
Perforated foams |
Apr. 13, 2004 |
| 6666998 |
Method and device for producing at least partially open-celled foam films from styrene polymers |
Dec. 23, 2003 |
| 6667350 |
Calcium borate infused foam building materials and the like and method of making same |
Dec. 23, 2003 |
| 6653360 |
Flexible foamed polyethylene |
Nov. 25, 2003 |
| 6632382 |
Extruded foam product with reduced surface defects |
Oct. 14, 2003 |
| 6613811 |
Microcellular thermoplastic elastomeric structures |
Sep. 2, 2003 |
| 6610755 |
Apparatus and process for making a corrugation-free foam |
Aug. 26, 2003 |
| 6610757 |
Foamable vinyl chloride resin composition |
Aug. 26, 2003 |
| 6602923 |
Process for producing alkenyl aromatic foams having increased thermal insulation using cycloalkane blowing agent and foams produced thereby |
Aug. 5, 2003 |
| 6596783 |
Process for producing foamed resin article |
Jul. 22, 2003 |
| 6590006 |
Macrocellular polyolefin foam having a high service temperature for acoustical applications |
Jul. 8, 2003 |
| 6586482 |
Uniform small cell foams and a continuous process for making same |
Jul. 1, 2003 |
| 6583188 |
Grafted thermoplastic compositions and fabricated articles therefrom |
Jun. 24, 2003 |
| 6573308 |
Biologically degradable foamed material particles |
Jun. 3, 2003 |
| 6559194 |
Polyolefin products and process additives therefor having reduced transfer to substrates |
May. 6, 2003 |
| 6541105 |
Acoustical open-cell polylefins and process for making |
Apr. 1, 2003 |
| 6528548 |
Synthetic thermoplastic resin extruded foams and methods for producing the same |
Mar. 4, 2003 |
| 6518320 |
Polyolefin products and process additives therefor having reduced transfer to substrates |
Feb. 11, 2003 |
| 6512013 |
Titanium dioxide nucleating agent systems for foamable polymer compositions |
Jan. 28, 2003 |
| 6512019 |
Polypropylene copolymer foams and their use |
Jan. 28, 2003 |
| 6506809 |
Titanium dioxide nucleating agent systems for foamable polymer compositions |
Jan. 14, 2003 |
| 6462101 |
Foam comprising a blend of low density polyethylene and high melt tension polypropylene |
Oct. 8, 2002 |
| 6420444 |
Tetrafunctional initiator |
Jul. 16, 2002 |
| RE37780 |
Method for the production of substantially open-cell polystyrene sheet |
Jul. 2, 2002 |
| 6399667 |
Process for producing foamed resin article |
Jun. 4, 2002 |
| 6395791 |
Grafted thermoplastic compositions and fabricated articles therefrom |
May. 28, 2002 |
| 6395795 |
Titanium dioxide nucleating agent systems for foamable polymer compositions |
May. 28, 2002 |
| 6391931 |
Uniform small cell foams and a continuous process for making same |
May. 21, 2002 |
| 6384095 |
Closed cell polymer foam |
May. 7, 2002 |
| 6376059 |
Polyethylene foams and methods of their production |
Apr. 23, 2002 |
| 6369120 |
Acoustical insulation foams |
Apr. 9, 2002 |
| 6355341 |
ENLARGED CELL SIZE FOAMS MADE FROM BLENDS OF ALKENYL AROMATIC POLYMERS AND ALPHA-OLEFIN/VINYL OR VINYLIDENE AROMATIC AND/OR STERICALLY HINDERED ALIPHATIC OR CYCLOALIPHATIC VINYL OR VINYLIDENE |
Mar. 12, 2002 |
| 6346556 |
Silicone rubber sponge composition, sponge, and process for making |
Feb. 12, 2002 |
| 6331576 |
Surface-decorated foam skin of cross-linked rubbery soft olefin resin |
Dec. 18, 2001 |
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