Connie Y. answered 06/14/19
M.A., J.D. TUTOR FOR ACADEMIC WRITING-K THRU GRAD/LAW SCHOOL-SPED/ND'S
It depends on the product and if you've filed your documents properly, but it can take months to years. However, your patent is good to protect you upon application--not final approval. That's why you often see "patent pending" which may or may not be true.