Here you go. The inventor on all of them is Ernest L. Baxter, and the assignee is Eastman Kodak. The latest patent builds on the prior ones, so I have listed all of the numbers I found:
2751309, 2646366, 2646365, 2262986, and RE21268
P.S. When you see the term "transparent zein" mentioned in the patents, some further research seems to indicate that it is another name for confectioner's glaze, of all things. This needs further checking.