Even before bankruptcy Kodak was trying to sell off these imaging patents. CEO Perez said over a year ago that they had a number of large tech companies interested in them. My guess he was trying to start up a bidding war, and didn't have any strong buyers. So this inability to sell assets is not a new thing.
The film sale might have a hard time attracting buyers, as the buyer would only control distribution and marketing, not production. So not an actual hard asset up for sale, and I have a hard time thinking of a company where this arrangement would fit well. Maybe MAC Group?