The patents, yes but not the formulas. If Kodak really wants to say Kodachrome is dead, they should make the formulas available through something like a creative commons licence, with the only condition being that anyone who decides to use them must credit Eastman Kodak with the process design.
The formulas were published decades ago in the Dignan Newsletter. At one time all the newletters were available on microfiche.
A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.