I found it interesting, though I didn't even know the fake history. The article says the Post R&D department used some of the technology for semi-moist dog foo

I found it interesting, though I didn't even know the fake history. The article says the Post R&D department used some of the technology for semi-moist dog food to make Country Squares, and six months later Kellogg introduced Pop-Tarts. Was Kellogg using the same technology as Post? If so, did they get it from reverse-engineering Country Squares? Did Post file a patent on it? If not, do you know why not?