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Class Information
Number: 521/179
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 reactant containing two or more three membered heterocyclic rings wherein two of the ring members are carbon atoms and the remaining ring member is a chalcogen atom > With -c(=x)-x containing reactant wherein x is a chalcogen atom
Description: Subject matter wherein the said three-membered heterocyclic material is reacted with a X containing reactant and wherein X is a chalcogen atom.

Patents under this class:

Patent Number Title Of Patent Date Issued
8268905 Compositions containing poly(lactic acid), bacteriocin(s), plasticizers(s), and optionally pore forming agent(s), and methods or making Sep. 18, 2012
8247467 Process for producing flexible polyurethane foams Aug. 21, 2012
8217094 Monolith separation medium for chromatographic use and method of producing the same Jul. 10, 2012
6642284 Flame-retardant coating Nov. 4, 2003
6251961 Flame-retartant coating Jun. 26, 2001
6075064 Rigid hydrophobic polyurethanes Jun. 13, 2000
5900320 Foamed plastic and method of manufacturing the same May. 4, 1999
5759691 Phosphorus-modified coating compositions, a process for their preparation, and their use Jun. 2, 1998
5759692 Phosphorous-modified coating compositions, a process for their preparation, and their use as an intumescent coating Jun. 2, 1998
5514726 Polymer foams with inherent nonflammability and thermal stability and methods of preparation thereof May. 7, 1996
5405887 Porous film Apr. 11, 1995
4686244 Intumescent foamable compositions Aug. 11, 1987
4294785 Process of casting polyparabanic acid films from stabilized organic amide solvents Oct. 13, 1981
4272467 Method for producing an essentially gas and liquid impermeable low density, closed-cell, microcellular polyparabanic acid article Jun. 9, 1981
4198488 Polymer-polyols and polyurethanes based thereon Apr. 15, 1980
4194035 Modified polyisocyanates containing sulfonic acid ester groups Mar. 18, 1980
4192938 Modified polyisocyanates containing sulfonic acid ester groups Mar. 11, 1980
4090986 Thermoset epoxy foam compositions and a method of preparing the same May. 23, 1978
4086195 Bitumen filled polyester foams Apr. 25, 1978
4076626 High strength cast modules for supporting reverse osmosis membranes Feb. 28, 1978
4000096 Measuring and mixing process for the manufacture of foamed resins and installation and conglomerates obtained by using them Dec. 28, 1976
3940349 Compositions and process for making rigid plastic foams of modified vinyl ester resins and silicone compounds Feb. 24, 1976

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