I received the patent application acceptance letter (utility model) in October last year, but I haven't received any other news so far. Is it possible that the application was unsuccessful?

did you apply by yourself or through an agency? If you apply by yourself, log on to the patent inquiry website, search your own account and see the development of the patent. If the agency applies, call to ask what it is.

The utility model came down almost six months ago. Yours didn't come down. Maybe the payment was not made in time, or there was something wrong with the procedure.

if you have any questions, you can leave a message.

I hope I can help you, Fujian Kangyuan Intellectual Property Affairs Co., Ltd. Finally, I wish you a happy life.