Not anymore than the BSD-no-nuclear clause insinuates that there's a version somewhere that is suitable for being run in the control system of nuclear power plants, it doesn't.
CC0 just makes it clear what is in-scope for the license – copyright, not patents, because it's intended as a formalization of public domain and that is not something that can be formalized re: patents – unlike BSD or GPLv2, which implicitly are about copyright but never actually come out and say so (and if you were looking to screw someone over with some patent you hold, you're better off with something that doesn't even mention it, like GPLv2, rather than prompting the lawyers to explicitly ask about patents because the license reminds them that they're not covered)