| |
 |
|
Class Information
Number: 521/58
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. > Particle which is expandible, process of preparing an expandible particle, or process of expanding a particle to form a cellular product > Expanding utilizing plural expansion steps
Description: Subject matter wherein the expansion steps occur in a plurality of stages.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7456227 |
Polymer particles and related articles |
Nov. 25, 2008 |
| 7456228 |
Durable foam of olefin polymers, methods of making foam and articles prepared from same |
Nov. 25, 2008 |
| 7358280 |
Process for processing expandable polymer particles and foam article thereof |
Apr. 15, 2008 |
| 7202284 |
Foamed thermoplastic polyurethanes |
Apr. 10, 2007 |
| 7175728 |
Heat-peelable adhesive sheet |
Feb. 13, 2007 |
| 7067030 |
Heat-peelable adhesive sheet |
Jun. 27, 2006 |
| 6797734 |
Polypropylene resin pre-expanded particle and in-mold expanded article thereof |
Sep. 28, 2004 |
| 6723760 |
Method for producing expanded or expandable polyolefin particles |
Apr. 20, 2004 |
| 6627668 |
Process for preparing polyolefin pre-expanded particles |
Sep. 30, 2003 |
| 6596782 |
Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded molding |
Jul. 22, 2003 |
| 6593382 |
Polyolefin resin pre-expanded particles and process for preparing the same |
Jul. 15, 2003 |
| 6593383 |
Process for preparing polyolefin pre-expanded particles |
Jul. 15, 2003 |
| 6573306 |
Process for the preparation of expandable polyvinylarene particles |
Jun. 3, 2003 |
| 6538042 |
Porous polymer particles |
Mar. 25, 2003 |
| 6506807 |
Process for preparing pre-expanded particles of thermoplastic resin |
Jan. 14, 2003 |
| 6476089 |
Expandable olefin bead polymers |
Nov. 5, 2002 |
| 6455599 |
Process for the preparation of expanded polyvinylarene particles |
Sep. 24, 2002 |
| 6399665 |
Dry expansion of expandable polymer beads |
Jun. 4, 2002 |
| 6348511 |
Method and device for multifoaming of expandable plastics |
Feb. 19, 2002 |
| 6326409 |
In-mold foaming article of polypropylene resin composition |
Dec. 4, 2001 |
| 6297292 |
Water expanded polystyrene particles |
Oct. 2, 2001 |
| 6271272 |
Expandable polystyrene composition, expanded beads and moulded parts |
Aug. 7, 2001 |
| 6265463 |
Degradation of expandable polymer bead products |
Jul. 24, 2001 |
| 6239185 |
Method for producing expanded polyolefin particles |
May. 29, 2001 |
| 6214896 |
Water-containing polypropylene resin composition and pre-expanded particles made thereof |
Apr. 10, 2001 |
| 6167892 |
Method for washing prefoamed particles |
Jan. 2, 2001 |
| 6166096 |
Pre-expanded particles of polypropylene resin, process for producing the same and process for producing in-mold foamed articles therefrom |
Dec. 26, 2000 |
| 6130266 |
Pre-expanded particles of propylene resin, process for preparing the same and flow-restricting device |
Oct. 10, 2000 |
| 6034144 |
Molded article of foamed and expanded beads of propylene resin |
Mar. 7, 2000 |
| 6013687 |
Pre-expanded polyolefin foam beads |
Jan. 11, 2000 |
| 5942551 |
Non-crosslinked linear low density polyethylene preexpanded particles and manufacturing method therefor |
Aug. 24, 1999 |
| 5917011 |
Short-cycle removal of impurities from polymers |
Jun. 29, 1999 |
| 5905096 |
Continuous production process of expandable styrene polymer beads |
May. 18, 1999 |
| 5886061 |
Polymers capable of reversibly complexing acid gases and foamed polymers produced therefrom |
Mar. 23, 1999 |
| 5883141 |
Process for preparing polyolefin resin pre-expanded particles |
Mar. 16, 1999 |
| 5866641 |
Process for the production of lightweight cellular composites of wood waste and thermoplastic polymers |
Feb. 2, 1999 |
| 5830922 |
Process for post-expansion of pre-expanded polyolefins beads |
Nov. 3, 1998 |
| 5821272 |
Method for post-treatment of polyolefin resin pre-expanded particles |
Oct. 13, 1998 |
| 5798437 |
Thermoplastic block copolymers |
Aug. 25, 1998 |
| 5773481 |
Polyolefin particle foam |
Jun. 30, 1998 |
| 5763498 |
Moldable thermoplastic polymer foam beads |
Jun. 9, 1998 |
| 5744505 |
Prefoamed polyolefin beads produced by extrusion |
Apr. 28, 1998 |
| 5718968 |
Memory molded, high strength polystyrene |
Feb. 17, 1998 |
| 5716998 |
Pre-expanded particles of polypropylene resin and process of preparing the same |
Feb. 10, 1998 |
| 5693683 |
Expandable styrene resin beads and process for producing the same |
Dec. 2, 1997 |
| 5609954 |
Strippable pressure-sensitive adhesive and adhesive material using the same |
Mar. 11, 1997 |
| 5605937 |
Moldable thermoplastic polymer foam beads |
Feb. 25, 1997 |
| 5599850 |
Pre-expanded articles of a polyolefin resin having microcell and process for preparing thereof |
Feb. 4, 1997 |
| 5589519 |
Process of extruding lightly crosslinked polyolefin foam |
Dec. 31, 1996 |
| 5580656 |
Process for drying microspheres |
Dec. 3, 1996 |
|
|
|
