Shenzhen Luhao's agency application process for invention patents is as follows:
From the date of application - 3 working days to get the acceptance notice - 3 to 7 months to pass the preliminary examination - —Notice of announcement of invention patent in about 8 months—Enter substantive examination stage in about 18 months—After passing the examination (reply to examination opinions during the examination period)—Issue the certificate in about two and a half to three years