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Class Information
Number: 521/182
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.
Description: Subject matter involving a cellular polymer derived from at least one reactant containing a-C X group (X is a chalcogen) or processes of preparing; composition containing a polymer derived from a -C X (X is a chalcogen) reactant or involving a polymerizable reactant and which composition is capable of forming a cellular product or processes of preparing same; processes of treating a cellular polymer derived from a -CX (X is a chalcogen) reactant with a material which neither reacts with the cellular polymer to change or modify chemical bonds therein or neither forms a desired composition with the cellular polymer, or products of such a treatment; processes of treating a cellular polymer without the addition of a material whereby a physical or chemical change in the polymer may be effected or products which are the result of such a treatment.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7361727 |
Copolymerization of 1,4-dioxan-2-one and a cyclic ester monomer producing thermal stabilized 1,4-dioxan-2-one (co)polymers |
Apr. 22, 2008 |
| 7151120 |
Degradable porous materials with high surface areas |
Dec. 19, 2006 |
| 7112417 |
Foam composite for the repair or regeneration of tissue |
Sep. 26, 2006 |
| 7056957 |
Formation of strong superporous hydrogels |
Jun. 6, 2006 |
| 7049348 |
Resorbable structure for treating and healing of tissue defects |
May. 23, 2006 |
| 6960617 |
Hydrogels having enhanced elasticity and mechanical strength properties |
Nov. 1, 2005 |
| 6867240 |
Porous composite materials |
Mar. 15, 2005 |
| 6833094 |
Dimensionally stable parts having good torsional stability and compositions and methods for making same |
Dec. 21, 2004 |
| 6797738 |
Open pore biodegradable matrices |
Sep. 28, 2004 |
| 6774208 |
Friction heat, cryogenic quench solid state polymerization |
Aug. 10, 2004 |
| 6766571 |
Adhesive composition comprising thermoplastic polyester and trapped gas bubbles |
Jul. 27, 2004 |
| 6723761 |
Microcellular foaming |
Apr. 20, 2004 |
| 6703431 |
Flexible open-celled microcellular polymer foams |
Mar. 9, 2004 |
| 6686400 |
Foamed and expanded beads of polyester-based resin and foam molding obtained therefrom |
Feb. 3, 2004 |
| 6630543 |
Method of making biodegradable polymer compositions |
Oct. 7, 2003 |
| 6596784 |
Strengthened thermoplastic for window coverings |
Jul. 22, 2003 |
| 6583189 |
Strengthened thermoplastic |
Jun. 24, 2003 |
| 6511650 |
Preparing porous hydrogel products |
Jan. 28, 2003 |
| 6486285 |
Water-swellable polymer gel and process for preparing the same |
Nov. 26, 2002 |
| 6479562 |
Blow-molded foamed films of polyester resin |
Nov. 12, 2002 |
| 6472443 |
Porous polymer media |
Oct. 29, 2002 |
| 6461732 |
Composites consisting of polyurethane and a thermoplastic material containing an inorganic polar additive |
Oct. 8, 2002 |
| 6458858 |
Biodegradable polyester material particles |
Oct. 1, 2002 |
| 6365249 |
Polyester resin foamed sheets |
Apr. 2, 2002 |
| 6339109 |
Method of pelletization of polymer |
Jan. 15, 2002 |
| 6313185 |
Polymers having backbones with reactive groups employed in crosslinking as precursors to nanoporous thin film structures |
Nov. 6, 2001 |
| 6306921 |
Foamed beads of polyester resin |
Oct. 23, 2001 |
| 6296842 |
Process for the preparation of polymer-based sustained release compositions |
Oct. 2, 2001 |
| 6291539 |
Flexible, low density thermoplastic foams and methods for lowering the density and increasing the flexibility of thermoplastic foams |
Sep. 18, 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 |
| 6258924 |
Biodegradable polymers, the preparation thereof, and the use thereof for producing biodegradable moldings |
Jul. 10, 2001 |
| 6214897 |
Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom |
Apr. 10, 2001 |
| 6191178 |
Polycarbonate resin foam and shock absorber using the same |
Feb. 20, 2001 |
| 6172128 |
Nanoporous polymers crosslinked via cyclic structures |
Jan. 9, 2001 |
| 6156812 |
Nanoporous material fabricated using polymeric template strands |
Dec. 5, 2000 |
| 6140380 |
Blowing agent and method for producing foamed polymers and related compositions |
Oct. 31, 2000 |
| 6100307 |
Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom |
Aug. 8, 2000 |
| 6100359 |
Ablative polyurea foam and prepolymer |
Aug. 8, 2000 |
| 6063826 |
Polyisocyanate based xerogels |
May. 16, 2000 |
| 6054500 |
Flexible polyester foams |
Apr. 25, 2000 |
| 6046248 |
Biodegradable polymers, the preparation thereof and the use thereof for producing biodegradable moldings |
Apr. 4, 2000 |
| 6037384 |
Expanded material and laminate |
Mar. 14, 2000 |
| 6025405 |
Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom |
Feb. 15, 2000 |
| 6020393 |
Biodegradable foamable co-polyester compositions |
Feb. 1, 2000 |
| 5994423 |
Urine absorber, method for producing it, urine absorbing method utilizing it and portable toilet |
Nov. 30, 1999 |
| 5973014 |
Process for the preparation of porous, hydrophilic, highly swellable hydrogels |
Oct. 26, 1999 |
| 5955511 |
Manufacturing ultramicrocellular polymer foams at low pressure |
Sep. 21, 1999 |
| 5948829 |
Process for preparing an absorbent foam |
Sep. 7, 1999 |
| 5948830 |
Mixtures of liquid-crystal polymers and polyarylene sulfoxides, foams made of such mixtures, process for their producing the same and their use |
Sep. 7, 1999 |
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