Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2010-10-18
2011-11-15
Cheung, William (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S117000, C568S012000, C521S079000
Reexamination Certificate
active
08058332
ABSTRACT:
Phosphorus-sulfur compounds have flame retardant activity in organic polymer systems. The phosphorus-sulfur compounds can be represented by the structure:wherein X is oxygen or sulfur, T is a covalent bond, oxygen, sulfur or nitrogen, provided that at least one of X and T is sulfur, each X′ is independently oxygen or sulfur, each m is independently zero or 1 when X′ is oxygen and zero, 1 or 2 when X′ is sulfur, n is at least 1 and preferably at least 2, each R is independently an unsubstituted or inertly substituted hydrocarbyl group or the R groups together form an unsubstituted or inertly substituted divalent organic group and A is an organic linking group.
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Edmunson, “Cyclic Organophosphorus Compounds-III, Some Sterically Hindered Pyrophosphates”, Tetrahedron 1965, pp. 2379-2387.
Beach Mark W.
Beulich Inken
Hu Ing Feng
Hudack Michelle L.
King Bruce A.
Cheung William
Cohn PLLC Gary C.
Dow Global Technologies LLC
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