Processes for making stabilized divalent germanium and tin...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...

Reexamination Certificate

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C556S021000

Reexamination Certificate

active

08053545

ABSTRACT:
Processes for making ivalent germanium and tin compounds are provided. The divalent germanium and tin compounds have been found to be efficient catalysts for the formation of polyurethanes.

REFERENCES:
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patent: 7371879 (2008-05-01), Ionkin
patent: 2007/0243390 (2007-10-01), Ionkin
patent: 2007/0244292 (2007-10-01), Ionkin
Advanced Inorganic Chemistry: A Comprehensive Text, 4th Edition, p. 381, 1980.
Ivan J. Boyer, Toxicity of Dibutyltin, Tributyltin and Other Organotin Compounds to Humans and to Experimental Animals, Toxicology, 1989,vol. 55:253-298.
Thomas F. Lytle et. al., Life-Cycle Toxicity of Dibutyltin to the Sheepshead Minnow (Cyprinodon Variegatus) and Implications of the Ubiquitous Tributyltin Impurity in Test Material, Appl. Organomet. Chem., 2003, vol. 17:653-661.
Bernard Jousseaume et. al., Air Activated Organtoin Catalysts for Silicone Curing and Polyurethane Preparation, Organometallics, 1994, vol. 13:1034-1038.
U.S. Appl. No. 11/407,007, filed Apr. 18, 2006, Alex Ionkin.
U.S. Appl. No. 11/407,009, filed Apr. 18, 2006, Alex Ionkin.
U.S. Appl. No. 11/407,003, filed Nov. 11, 2006, Alex Ionkin.

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