Thanks a lot this is right up my alley. Thanks to Dell4C I have been able to add a lot of PD Dell to CB+. Dell did not renew. I have been searching copyrights to see what has been renewed of their licenses books. Some features are all renewed and we can not touch Disney stuff. If the comics are not renewed I have to check story titles to see if they are episode adaptations. If they are adaptations that are renewed then the comic is not PD. Very few are adaptations. I have found some so I have to keep looking. Strangely enough according to
http://cocatalog.loc.gov/ an issue in the middle of Sugarfoot was not renewed. Good for readers when they make those kind of mistakes.