How long will it take for the patent to come out?

Has your patent been published? Have you submitted a request for substantive examination? If all these processes are completed, you should see the publication date on the notice that the application for a patent for invention has entered the substantive examination procedure issued by the Patent Office. From which posting date, you need to wait 3- 18 months. It mainly depends on what field you are applying for, different fields and different time. Difficult field 18 months, difficult field for 3 months. As far as I know, the field of alloys is being reviewed quickly at present.