The [patentability] tag is supposed to be for questions about patentability law — i.e. Questions about what conditions must be met for a patent to be held valid. But the [patentability] tags is quickly becoming the go-to tag for any post asking about specific patents.
I suspect this is because folks try and tag their questions p-a-t-e-n-t … and this is the first thing that pops up.
I suggest renaming the [patentability] tag to disambiguate it as a "law-related" tag.