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Class Information
Number: 521/187
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 reactant which is an aldehyde or aldehyde derivative > 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 |
| 6960617 |
Hydrogels having enhanced elasticity and mechanical strength properties |
Nov. 1, 2005 |
| 6924322 |
Thio-,amine-,nitro-,and macrocyclic containing organic aerogels & xerogels |
Aug. 2, 2005 |
| 6828354 |
Hydrophilic open-cell, elastic foams with a melamine/formaldehyde resin base, production thereof and use thereof in hygiene products |
Dec. 7, 2004 |
| 6689836 |
Process for the preparation of thermoprecipitating affinity polymers |
Feb. 10, 2004 |
| 6608118 |
Melamine molded foam, process for producing the same, and wiper |
Aug. 19, 2003 |
| 6607817 |
Melamine resin foam with excellent oil repellency |
Aug. 19, 2003 |
| 6506808 |
Microcellular thermoset foams and method for producing the same |
Jan. 14, 2003 |
| 6486285 |
Water-swellable polymer gel and process for preparing the same |
Nov. 26, 2002 |
| 6399666 |
Insulative matrix material |
Jun. 4, 2002 |
| 6350511 |
Melamine resin foam |
Feb. 26, 2002 |
| 6271278 |
Hydrogel composites and superporous hydrogel composites having fast swelling, high mechanical strength, and superabsorbent properties |
Aug. 7, 2001 |
| 6110578 |
Expanded material and laminate |
Aug. 29, 2000 |
| 6087407 |
Flexible aerogel composite for mechanical stability and process of fabrication |
Jul. 11, 2000 |
| 5973015 |
Flexible aerogel composite for mechanical stability and process of fabrication |
Oct. 26, 1999 |
| 5962539 |
Process and equipment for drying a polymeric aerogel in the presence of a supercritical fluid |
Oct. 5, 1999 |
| 5916999 |
Process for producing filaments from melamine/formaldehyde condensation products |
Jun. 29, 1999 |
| 5731360 |
Compression molding of aerogel microspheres |
Mar. 24, 1998 |
| 5705535 |
Method for the subcritical drying of aerogels |
Jan. 6, 1998 |
| 5547996 |
Method of producing foamed polymer materials |
Aug. 20, 1996 |
| 5541234 |
Process for making low density hydrogel materials having high surface areas |
Jul. 30, 1996 |
| 5525644 |
Potted electrical components and methods of making the same |
Jun. 11, 1996 |
| 5514726 |
Polymer foams with inherent nonflammability and thermal stability and methods of preparation thereof |
May. 7, 1996 |
| 5494940 |
Low density materials having high surface areas and articles formed therefrom |
Feb. 27, 1996 |
| 5436278 |
Melamine resin foam, process for production thereof and melamine/formaldehyde condensate |
Jul. 25, 1995 |
| 5413853 |
Melamine resin foam |
May. 9, 1995 |
| 5360832 |
Hollow particles of crosslinked melamine resin having a uniform particle diameter and a process for producing the same |
Nov. 1, 1994 |
| 5328939 |
Rigid materials having high surface area and low density |
Jul. 12, 1994 |
| 5232955 |
Process for producing a high strength artificial (cast) stone with high permeability and filter effect |
Aug. 3, 1993 |
| 5190983 |
Hollow particles of crosslinked melamine resin having a uniform particles diameter and a process for producing the same |
Mar. 2, 1993 |
| 5190985 |
Stable aminoplast cellular foams and the process for their manufacture |
Mar. 2, 1993 |
| 5162487 |
Melamine resin moldings having increased elasticity |
Nov. 10, 1992 |
| 5118722 |
Method of producing elastic foams having a base of polyurethane by microwave foaming |
Jun. 2, 1992 |
| 5086085 |
Melamine-formaldehyde aerogels |
Feb. 4, 1992 |
| 5084488 |
Melamine resin moldings having increased elasticity |
Jan. 28, 1992 |
| 5081163 |
Melamine-formaldehyde aerogels |
Jan. 14, 1992 |
| 4945015 |
Intumescent material |
Jul. 31, 1990 |
| 4753746 |
Urea-formaldehyde foam detergent and method of manufacture using a thixotropic agent |
Jun. 28, 1988 |
| 4708967 |
Thermosetting resin binder particles and methods for making waferboard |
Nov. 24, 1987 |
| 4666948 |
Preparation of resilient melamine foams |
May. 19, 1987 |
| 4544676 |
Sound-insulating leather powder compositions |
Oct. 1, 1985 |
| 4540717 |
Resilient foam based on a melamine-formaldehyde condensate |
Sep. 10, 1985 |
| 4537913 |
Method of preparing a urea-formaldehyde combination foam that is low in formaldehyde |
Aug. 27, 1985 |
| 4532263 |
Expansible polymer molding process and the resultant product |
Jul. 30, 1985 |
| 4532094 |
Thermoplastic foam molding |
Jul. 30, 1985 |
| 4530940 |
Stabilized melamine resin foams |
Jul. 23, 1985 |
| 4525492 |
Modified phenolic foams |
Jun. 25, 1985 |
| 4522878 |
Material having high mechanical strength and density close to unity, the manufacture and uses thereof |
Jun. 11, 1985 |
| 4511678 |
Resilient foam based on a melamine-formaldehyde condensate |
Apr. 16, 1985 |
| 4490486 |
Formaldehyde immobilization method |
Dec. 25, 1984 |
| 4482648 |
Foamed ink composition and method of making the same |
Nov. 13, 1984 |
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