Ian;
I think that you discount Kodak's R&D effort too much. They were the first with the best digital sensors, and they were the first and best with masked color negative and dispersed couplers. They were first in slide coating and they are currently at the head of the pack in a new generation of sensors and OLEDs. Their senstizing dye technology is second to none!
When Land could not make an instant product, he turned to Kodak to make him one and then give him the formula. For years, Kodak had to make it for him, as he could not build a plant capable of its manufacture in an economical manner until the SX-70 came along and he built a new plant.
Yes, they bought technology, but before Mannes and Godowsky, they had a 2 color film and a lenticular color film.
Kodak's R&D Labs gets thousands of useful patents each year, and the engineers publish many research papers. I think that your viewpoint is sadly lacking in information.
PE