The Stark's building still stands, now occupied by a cemetery marker company (you know, tombstones). I also acquired many of my baseball cards at the old Stark's. Most kids looked for a nice little snack like an ice cream sandwich.
In 1965 we saw the "Lost in Space" TV show come out. It seemed there was an obvious connection. This is the kind of thing lawyers can hash over. The TV show had no license to be derivative from the comic book. But just how derivative was it? People like me who remember both would cringe at the suggestion they were essentially identical. The TV series, especially toward the end, became a campy presentation drawing young kids as fans. Campy or farcical entertainment has its place (e.g. the "Mary Hartman" TV series), but Space Family Robinson was serious, artistic and intellectual. It never deviated from that.