Do the paternal uncles receive their brother's share of his son's inheritance (the questioner's father), while he is unconscious and close to death, knowing that his wife (the questioner's grandmother) has passed away?

The paternal uncles are not entitled to take their father's (the grandfather's) money and divide his inheritance before his death, because a living person cannot be inherited from. It is more appropriate to divide the father's inheritance and give the grandfather his share from it, which is one-sixth due to the presence of a lineal descendant. If the grandfather dies, his inheritance will be divided among his heirs, and it is not permissible to divide it during his lifetime.