Cannot find the patent electronic bill.

Then prove that it is not in your account, or because the other party's transfer information is wrong, the transferee can't receive it. Under normal circumstances, the patent fee e-ticket is usually found within 7 working days after you apply, but it depends on when your patent fee e-ticket was uploaded. If it is uploaded on a working day, it can be found on the same day. If it is a rest day, it may take several days.