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Class Information
Number: 521/904
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Polyurethane cellular product having high resiliency or cold cure property
Description: Subject matter involving cellular polyurethane products having high resiliency or cold cure property.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8609740 Closed-loop recycled polyurethane foam, methods of manufacture and products therefrom Dec. 17, 2013
6784217 Process for making high resilience foams Aug. 31, 2004
6774153 Process for preparing a free rise or slabstock flexible polyurethane foam Aug. 10, 2004
6635203 Composite polymeric material having high resistance to impact energy Oct. 21, 2003
6617369 Process for making visco-elastic foams, polyols blend and reaction system useful therefor Sep. 9, 2003
6593387 Process for making high resilience foams Jul. 15, 2003
6417241 Process for preparing a flexible polyurethane foam Jul. 9, 2002
6326077 Composite polymeric material having high resistance to impact energy Dec. 4, 2001
6080353 Method of molding a heat-resistant container Jun. 27, 2000
5721035 Foam structure Feb. 24, 1998
5686187 Molded polyurethane SRIM articles Nov. 11, 1997
5194325 Molded polyurethane foam system utilizing HFC blowing agents Mar. 16, 1993
5070112 Process for making flexible polyurethane foam Dec. 3, 1991
5064870 Method for the production of highly elastic, cold-curing polyurethane foams Nov. 12, 1991
4945120 Process for the production of polyurethane foams using sterically hindered aromatic diamines Jul. 31, 1990
4904706 Soft polyurethane foam from hydroxyl urethane prepolymer and polyester ether polyol Feb. 27, 1990
4814360 High resiliency molded foam consisting of the reaction product of a polyisocyanate, a polyoxyalkylene polyether polyol, water and a halogenated monohydric alcohol Mar. 21, 1989
4791146 Method of preparing dimensionally stable, flexible urethane foam and the foam produced thereby Dec. 13, 1988
4751253 Method of preparing dimensionally stable, flexible urethane foam and the foam produced thereby Jun. 14, 1988
4717509 Reactive fire-protective formulation for rendering polyurethane rigid foam materials flame-resistant and process for preparing same Jan. 5, 1988
4647596 Microcellular polyurethane elastomer and manufacturing method of the same Mar. 3, 1987
4546122 Flexible polyurethane foams Oct. 8, 1985
4546116 Process for the production of highly elastic foams containing urethane groups and foams obtainable by this process Oct. 8, 1985
4517313 Method of making polyurethane foam May. 14, 1985
4500656 Process for the preparation of a cellular polyurethane Feb. 19, 1985
4497913 Process for preparing a stable dispersion of a polymer in a polyol and its use in the production of high resilience polyurethane foam Feb. 5, 1985
4478957 Process for the production of highly resilient, cold-curing polyurethane foams Oct. 23, 1984
4463050 Polyurethane catalyst system additive which permits the use of relatively "cold" molds Jul. 31, 1984
4454253 Polyurethane foam game ball, composition and process Jun. 12, 1984
4454252 Process of sealing and strengthening water-bearing geological formations by means of polyurethane-resin-forming compositions Jun. 12, 1984
4436843 High-resilience polyurethane foams having improved resistance to shrinkage Mar. 13, 1984
4384052 Polyurethanes produced from an adduct of an organic polyisocyanate and certain amines May. 17, 1983
4383079 Extension of polyurethane hydrogel cure time May. 10, 1983
4383050 Process for the preparation of low temperature flexible polyurethane elastomers May. 10, 1983
4380591 Novel amino catalyst mixture for stabilization of polyurethane foam Apr. 19, 1983
4379757 Tertiary amine catalyst mixtures useful in cellular polyurethane formation Apr. 12, 1983
4374934 Semi-flexible foam polymer used in packaging Feb. 22, 1983
4350780 Polyurethanes made with polymer/polyols prepared via preformed stabilizers Sep. 21, 1982
4338407 Stabilization of high resilience polyurethane foam Jul. 6, 1982
4309508 Siloxane copolymer mixtures useful as foam stabilizers in high resilience polyurethane foam Jan. 5, 1982
4304875 Polyurethane foaming composition comprising triorganosilylated polypentaerythritol stabilizer Dec. 8, 1981
4304872 Flexible polyurethane foams having substantial number of cells with internal residual cell surface of 60 to 90 percent Dec. 8, 1981
4302272 Process for heat sealing polyurethane foam Nov. 24, 1981
4299923 Alkyl-modified siloxane copolymers useful as foam stabilizers in high resilience polyurethane foam Nov. 10, 1981
4284728 HR foams made with reactive polyol compositions having improved stability Aug. 18, 1981
4278770 Stabilization of high resilience polyurethane foam by including in the reaction mixture a polyol containing an effectively dispersed finely divided solid particulate material Jul. 14, 1981
4276385 Process for preparing cold-cured molded polyurethane flexible from a high molecular weight siloxane and a solvent Jun. 30, 1981
4273881 Organo-phosphorus flame-retardant for polyurethane foams prepared from graft polyoxyalkylene polyether polyols Jun. 16, 1981
4254069 Heat stable reaction injection molded elastomers Mar. 3, 1981
4239856 Method for preparing high-resilient flexible urethane foams Dec. 16, 1980

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