Funny how Coca-cola cannot patent it's recipe for Coca-cola. Funny.
Oh that's right, it's because you cannot patent a food recipe.
Actually, you can patent a recipe. See here and here. The second link gives examples, although some seem to be more about the process than the ingredients. But then, we don't know what's important about the Coke recipe either.
Amazing how Coca-cola is able to survive without food recipe patents.
Coca-Cola doesn't WANT to patent their recipe, because then it would become public.
That's why they rely on it being a trade secret instead, locked in a vault.