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Class Information
Number: 528/237
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > From aldehyde or derivative thereof as reactant > Polymerizing in the presence of a specified material other than a reactant > Material contains a metal atom > Material contains a heavy metal atom > Heavy metal is a group iva metal atom (ge, sn, pb)
Description: Subject matter wherein the specified material is a Group IVA metal atom, i.e., Ge, Sn, Pb.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6335304 |
Metal salts of phosphoric acid esters as cross linking catalysts |
Jan. 1, 2002 |
| 5770678 |
Polymerization of, and depolymerization to, cyclic ethers using selected metal compound catalysts |
Jun. 23, 1998 |
| 5728798 |
Process for preparing polyacetal copolymer |
Mar. 17, 1998 |
| 5641853 |
Polymerization of cyclic ethers using selected metal compound catalysts |
Jun. 24, 1997 |
| 5248762 |
Process for preparing cyclic polyoxymethylene |
Sep. 28, 1993 |
| 5124417 |
Initiators for cationic polymerization |
Jun. 23, 1992 |
| 4956445 |
Process for the preparation of acetal polymer or copolymer |
Sep. 11, 1990 |
| 4847332 |
Terminally unsaturated macromolecular monomers of polyformals and copolymers thereof |
Jul. 11, 1989 |
| 4789696 |
Catalyzed cationic paint binders |
Dec. 6, 1988 |
| 4677187 |
Furfuryl alcohol-aldehyde resins |
Jun. 30, 1987 |
| 4525573 |
Thermoset polymers and prepolymers obtained by polycondensation of alkyl pyridine with hydroxyl aromatic monoaldehydes |
Jun. 25, 1985 |
| 4405771 |
Organometallic polymers, their preparation and compositions containing them |
Sep. 20, 1983 |
| 4399272 |
Process for producing polyacetal copolymers |
Aug. 16, 1983 |
| 4398034 |
Process for the preparation of low molecular weight polyesters from hydroxypivaldehyde |
Aug. 9, 1983 |
| 4332930 |
Process for polymerizing formaldehyde |
Jun. 1, 1982 |
| 4220751 |
Preparation of soft and hard resins, and their use |
Sep. 2, 1980 |
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