Why can x86 apply for a patent, so that others can't turn on the cpu?

Instruction set is an important technology to improve the running efficiency of CPU. Of course you can apply for a patent. The patent is not that others can't use it, but that others can't use it for free. When using this patent, you must pay the patent fee to Intel. If you use it without informing Intel and paying the patent fee, then Intel will sue with a professional team of lawyers. This CPU can't be listed before this lawsuit is finished. Of course, CPU technology is used a lot, and it is difficult to define technology. Intel can also use this to delay competitors' products.