Rocketman was a Farrell comic from 1952, which looks to have been drawn several years earlier. The Grand Comics Database claims it is an Iger Shop job.
"Rocketman" has been inserted in the balloons and captions where another shorter name was whited out. Although claiming it as a shop job, GCD also guesses it's drawn by Chas. ("Cat-Man") Quinlan.
OK, I'm getting away from the story, which is totally silly science fiction hokum. It's set in the year 25,000 (!), and includes a girl getting away from her captor by slamming his nose in a steamer trunk lid. I kid you not.