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Class Information
Number: 521/188
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 > Nitrogen reactant contains a -n-c(=x)-n group wherein x is a chalcogen atom, e.g.,urea, etc.
Description: Subject matter wherein the nitrogen reactant contains a -N N moiety wherein X is a chalcogen atom.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6613809 |
Metal-doped organic gels and method thereof |
Sep. 2, 2003 |
| 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 |
| 5705535 |
Method for the subcritical drying of aerogels |
Jan. 6, 1998 |
| 5338819 |
Solid isocyanate derivatives useful in one component polyurethane adhesives |
Aug. 16, 1994 |
| 5232955 |
Process for producing a high strength artificial (cast) stone with high permeability and filter effect |
Aug. 3, 1993 |
| 5190985 |
Stable aminoplast cellular foams and the process for their manufacture |
Mar. 2, 1993 |
| 5118722 |
Method of producing elastic foams having a base of polyurethane by microwave foaming |
Jun. 2, 1992 |
| 4986908 |
Organic-based porous microspheres for HPLC |
Jan. 22, 1991 |
| 4939182 |
Melamine-alkanolamine condensates and polyurethanes prepared therefrom |
Jul. 3, 1990 |
| 4902413 |
Organic-based porous microspheres for HPLC |
Feb. 20, 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 |
| 4655952 |
Detergent and method for producing the same |
Apr. 7, 1987 |
| 4604448 |
Moulding compositions from melamine-formaldehyde resoles |
Aug. 5, 1986 |
| 4576972 |
Closed cell phenolic foam |
Mar. 18, 1986 |
| 4546119 |
Closed cell phenolic foam |
Oct. 8, 1985 |
| 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 |
| 4530940 |
Stabilized melamine resin foams |
Jul. 23, 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 |
| 4489175 |
Method of producing a urea formaldehyde combination foam with a low content of formaldehyde |
Dec. 18, 1984 |
| 4480055 |
Process for manufacturing modified amino-resin products |
Oct. 30, 1984 |
| 4467054 |
Foams based on low formaldehyde-emission urea-formaldehyde resin and process for their preparation |
Aug. 21, 1984 |
| 4448687 |
Process for the production of semipermeable polybenzimidazole membranes with low temperature annealing |
May. 15, 1984 |
| 4403013 |
Thermosetting resin glues foamable to high density |
Sep. 6, 1983 |
| 4390643 |
Process for producing amine formaldehyde resin foam |
Jun. 28, 1983 |
| 4366264 |
Use of calcium metasilicate (wollastonite) as a formaldehyde suppressant for urea formaldehyde resins |
Dec. 28, 1982 |
| 4356275 |
Aminoplast foams |
Oct. 26, 1982 |
| 4346181 |
Method of reducing formaldehyde emissions from formaldehyde condensation polymers |
Aug. 24, 1982 |
| 4345061 |
Process for the preparation of phenol-urea-formaldehyde condensation products |
Aug. 17, 1982 |
| 4334971 |
Manufacture of resilient foams based on a melamine-formaldehyde condensate |
Jun. 15, 1982 |
| 4307201 |
Highly adsorptive macroporous polymers |
Dec. 22, 1981 |
| 4299925 |
Resin foams |
Nov. 10, 1981 |
| 4291128 |
Process for making urea-formaldehyde insulation |
Sep. 22, 1981 |
| 4273887 |
Process for preparation of foams by condensation reactions |
Jun. 16, 1981 |
| 4273883 |
Urea-formaldehyde polymers having reduced formaldehyde emission and cellular urea formaldehyde foam which is resistant to acid-induced hydrolysis |
Jun. 16, 1981 |
| 4267277 |
Method of producing urea-formaldehyde resin and foam having reduced formaldehyde emission |
May. 12, 1981 |
| 4264742 |
Opacifying agents and process for production |
Apr. 28, 1981 |
| 4256845 |
Porous sheets and method of manufacture |
Mar. 17, 1981 |
| 4239881 |
Phenal-urea-formaldehyde condensation product |
Dec. 16, 1980 |
| 4239646 |
Microspheric opacifying agents and method for their production |
Dec. 16, 1980 |
| 4234698 |
Method of making cured aminoplast foam |
Nov. 18, 1980 |
| 4225680 |
Urea formaldehyde foam with low shrinkage |
Sep. 30, 1980 |
| 4216295 |
Foamable resole resin composition |
Aug. 5, 1980 |
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