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Class Information
Number: 521/183
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. > Cellular product derived from a -c-c(=x)-x containing reactant wherein x is a chalcogen atom, e.g., phthalic acid, etc. > Nitrogen containing reactant
Description: Subject matter wherein at least one reactant contains a nitrogen atom.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7169339 |
Method for producing polymethacrylimide foams |
Jan. 30, 2007 |
| 7074880 |
Polyimide aerogels, carbon aerogels, and metal carbide aerogels and methods of making same |
Jul. 11, 2006 |
| 6960617 |
Hydrogels having enhanced elasticity and mechanical strength properties |
Nov. 1, 2005 |
| 6814910 |
Aromatic polyimide foam |
Nov. 9, 2004 |
| 6797738 |
Open pore biodegradable matrices |
Sep. 28, 2004 |
| 6670405 |
Method for producing block-shaped polymethacrylimide foamed materials |
Dec. 30, 2003 |
| 6576683 |
Aromatic polyimide foam |
Jun. 10, 2003 |
| 6565962 |
Polyimide porous film |
May. 20, 2003 |
| 6506808 |
Microcellular thermoset foams and method for producing the same |
Jan. 14, 2003 |
| 6472443 |
Porous polymer media |
Oct. 29, 2002 |
| 6465536 |
Superabsorbing fibers and films and processes for preparing same |
Oct. 15, 2002 |
| 6461732 |
Composites consisting of polyurethane and a thermoplastic material containing an inorganic polar additive |
Oct. 8, 2002 |
| 6414043 |
Hydrogel materials with crystalline colloidal array of watervoids for detection and macromolecule separations |
Jul. 2, 2002 |
| 6399669 |
Porous material and a method for producing the same |
Jun. 4, 2002 |
| 6342454 |
Electronic devices with dielectric compositions and method for their manufacture |
Jan. 29, 2002 |
| 6294588 |
Superabsorbing fibers and films and processes for preparing same |
Sep. 25, 2001 |
| 6281256 |
Open pore biodegradable matrices |
Aug. 28, 2001 |
| 6271278 |
Hydrogel composites and superporous hydrogel composites having fast swelling, high mechanical strength, and superabsorbent properties |
Aug. 7, 2001 |
| 6140380 |
Blowing agent and method for producing foamed polymers and related compositions |
Oct. 31, 2000 |
| 6133330 |
Aromatic polyimide foam |
Oct. 17, 2000 |
| 6084000 |
Hollow polyimide microspheres |
Jul. 4, 2000 |
| 6063826 |
Polyisocyanate based xerogels |
May. 16, 2000 |
| 5998491 |
Super-absorbing polymeric networks |
Dec. 7, 1999 |
| 5997791 |
Superabsorbing fibers and films and processes for preparing same |
Dec. 7, 1999 |
| 5998492 |
Super-absorbing polymeric networks |
Dec. 7, 1999 |
| 5994418 |
Hollow polyimide microspheres |
Nov. 30, 1999 |
| 5973014 |
Process for the preparation of porous, hydrophilic, highly swellable hydrogels |
Oct. 26, 1999 |
| 5968598 |
PPD-T structural composites |
Oct. 19, 1999 |
| 5928459 |
Process for the production of polymethacrylimide foam materials |
Jul. 27, 1999 |
| 5919833 |
Open celled foam and method of making an open celled foam |
Jul. 6, 1999 |
| 5900440 |
Open celled low density foam and method of making such an open celled foam |
May. 4, 1999 |
| 5898040 |
Microporous polymeric foams and microtextured surfaces |
Apr. 27, 1999 |
| 5889072 |
Process for preparing superabsorbing crosslinked polyaspartate salt |
Mar. 30, 1999 |
| 5864002 |
Process for coloring polymer resins and products thereof |
Jan. 26, 1999 |
| 5859179 |
Forming superabsorbent polymer |
Jan. 12, 1999 |
| 5847012 |
Microporous polymeric foams and microtextured surfaces |
Dec. 8, 1998 |
| 5847013 |
Superabsorbing polymeric networks |
Dec. 8, 1998 |
| 5830987 |
Amino-acrylate polymers and method |
Nov. 3, 1998 |
| 5804607 |
Process for making a foamed elastomeric polymer |
Sep. 8, 1998 |
| 5786397 |
Foamable molding compositions |
Jul. 28, 1998 |
| 5786404 |
Open celled low density foam and method of making such an open celled foam |
Jul. 28, 1998 |
| 5783610 |
High-strength synthetic resin foam and process of fabrication thereof |
Jul. 21, 1998 |
| 5770636 |
Open celled foam and method of making an open celled foam |
Jun. 23, 1998 |
| 5731359 |
Vibration-absorbing elements |
Mar. 24, 1998 |
| 5708041 |
Foamable molding compositions |
Jan. 13, 1998 |
| 5698605 |
Flame-resistant polymethacrylimide foams |
Dec. 16, 1997 |
| 5652276 |
Foaming resin composition, plastic foam formed from the composition, and method for forming the plastic foam |
Jul. 29, 1997 |
| 5612384 |
Superabsorbing polymeric networks |
Mar. 18, 1997 |
| 5525682 |
Superabsorbent polymer and process for producing same |
Jun. 11, 1996 |
| 5525644 |
Potted electrical components and methods of making the same |
Jun. 11, 1996 |
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