Filing a patent just to have a patent is a few $100 - even less if you only file provisionally and hope the new employer doesn't understand the difference!
But if you want a patent to be of value, then it needs professional drafting and filing in multiple countries with specialist lawyers who understand for instance why Taiwan is different. That and translation and renewal fees costs $10-100K
But if you want a patent to be of value, then it needs professional drafting and filing in multiple countries with specialist lawyers who understand for instance why Taiwan is different. That and translation and renewal fees costs $10-100K