I filled a patent in France. That was denied by the French office as being a conceptual method More than an invention. I accepted that decision. But there is a completely unexpected side effect, explained to me by a patent advisor. I probably now can oppose that nullified patent to any patent that would implement a version of that conceptual method. Not sure of the reality of that statement, but that’s a funny backfire.
it makes perfect sense. inventions implementing some abstract concept thats already known with prior art (like your rejected patent) cant really count as novel.
otherwise an evil law firm could spam adaptations of your idea to every relevant industry and get rights over your invention without your consent. that would be a complete perversion of what the patent system is supposed to do.