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Class Information
Number: 521/79
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
Description: Subject matter drawn to processes of cell formation wherein said cell formation is achieved or initiated by a step of extrusion of a molten or liquid material from a region of high pressure through an orifice into a region of lower pressure.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7455799 |
Method of producing polishing pad-use polyurethane foam and polyurethane foam |
Nov. 25, 2008 |
| 7435762 |
Fire resistant foam and foam products, method and dispersions for making same |
Oct. 14, 2008 |
| 7329360 |
Oil recovery and environmental cleanup compositions comprising a polyethylene/vinyl acetate copolymer |
Feb. 12, 2008 |
| 7312253 |
Insulating thermoplastic foams made with methyl formate-based blowing agents |
Dec. 25, 2007 |
| 7307105 |
Thermoplastic foams made with methyl formate-based blowing agents |
Dec. 11, 2007 |
| 7265160 |
Crosslinked biodegradable resin continuous foamed sheet and method for production thereof |
Sep. 4, 2007 |
| 7244380 |
Process for producing polystyrene resin foam by extrusion |
Jul. 17, 2007 |
| 7173070 |
Foam cushion and method of making and using the same |
Feb. 6, 2007 |
| 7173069 |
Polyolefin foams and methods of making the same |
Feb. 6, 2007 |
| 7166248 |
Reduced VOC emission alkenyl aromatic polymer foams and processes |
Jan. 23, 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 |
| 7113848 |
Human emulation robot system |
Sep. 26, 2006 |
| 7060736 |
Blowing agent solubility in polymers |
Jun. 13, 2006 |
| 7048878 |
Process of forming oil-absorbent bodies |
May. 23, 2006 |
| RE38993 |
Process for producing alkenyl aromatic foams using a combination of atmospheric and organic gases and foams produced thereby |
Feb. 28, 2006 |
| 6963001 |
Low shrinkage thermosetting resin compositions and methods of use therefor |
Nov. 8, 2005 |
| 6960616 |
Expanded porous thermoplastic polymer membranes |
Nov. 1, 2005 |
| 6958365 |
Manufacturing process for open celled microcellular foam |
Oct. 25, 2005 |
| 6956068 |
Microcellular foam dielectric for use in transmission lines |
Oct. 18, 2005 |
| 6949588 |
Perforated foams |
Sep. 27, 2005 |
| 6911489 |
Methods for preparing agglomerated pellets of polytetrafluoroethylene and molded articles and the agglomerated pellets of polytetrafluoroethylene and molded articles prepared thereby |
Jun. 28, 2005 |
| 6908950 |
Asphalt filled polymer foam |
Jun. 21, 2005 |
| 6908668 |
Foamed polyolefin resin sheet |
Jun. 21, 2005 |
| 6902693 |
Expanded porous thermoplastic polymer membranes and method for the production thereof |
Jun. 7, 2005 |
| 6893594 |
Extruded window and door composite frames |
May. 17, 2005 |
| 6884823 |
Injection molding of polymeric material |
Apr. 26, 2005 |
| 6872756 |
Foam comprising ethylene/vinyl acetate copolymer |
Mar. 29, 2005 |
| 6870003 |
Process for production of modified thermoplastic resin and modified thermoplastic resins |
Mar. 22, 2005 |
| 6852825 |
Polyester urethanes |
Feb. 8, 2005 |
| 6841581 |
Extruded styrene resin foam and process for producing the same |
Jan. 11, 2005 |
| 6831113 |
Amine-modified epoxy resin reacted in presence of latent hardener |
Dec. 14, 2004 |
| 6815047 |
Foamed thermoplastic resin sheet and manufacturing method of the same |
Nov. 9, 2004 |
| 6809124 |
Method for the production block foam |
Oct. 26, 2004 |
| 6800669 |
Propylene copolymer foams |
Oct. 5, 2004 |
| 6790870 |
Methods of making foamed materials of blended thermoplastic polymers using carbon dioxide |
Sep. 14, 2004 |
| 6773804 |
Extruded polymeric high transparency films |
Aug. 10, 2004 |
| 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 |
| 6765029 |
Method for production of porous cross-linked polymer sheet |
Jul. 20, 2004 |
| 6762212 |
Extruded styrene resin foams and methods for producing the same |
Jul. 13, 2004 |
| 6759445 |
Foam material comprising linear, isotactic polymers |
Jul. 6, 2004 |
| 6750264 |
Multimodal polymeric foam containing an absorbent clay |
Jun. 15, 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 |
| 6699421 |
Method for forming foamed polypropylene resin sheet and foamed formed article |
Mar. 2, 2004 |
| 6696504 |
Extruded styrene resin foams, and methods for producing the same |
Feb. 24, 2004 |
| 6667350 |
Calcium borate infused foam building materials and the like and method of making same |
Dec. 23, 2003 |
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