| http://www.w3.org/ns/prov#value | - United States Pat. No. 3,954,693, issued May 4, 1976, to C.C. Fong, is representative of prior art coating compositions for aircraft utilizing an epoxy resin binder with a polyisocyanate hardener of specific type, pigments such as zinc, cobalt, and strontium chromates, a suspending agent which may comprise pyrogenic silica in amounts up to 4% by weight of the epoxy resin, a catalyst, an epoxy-cont
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