How long did it take for your patents in general to be approved ? Did you initially file the provisional one ? And later promoted to actual after getting a funding round ? How useful were the patents for funding rounds ?
What kind of patents take months and what kind take years ? For startups years is too much
With my limited knowledge I can tell Us vs international patent Very new vs some addition to existing technology
So US patents are quicker approved ? Very new makes sense to be approved quicker
International patent has to be approved by all selected countries
Partial answer: provisional is to lock the date of application. After that you have one year to change that to a patent application. Once applied it will get reviewed and awarded or rejected(may take months to years). All you need to do is pay the patent fee. Awarded Patents are generally useful in the funding rounds.