Patent fees include official fees and agency fees (if they are not operated by themselves).
Official fees: The official fees of the three types of patents are different. See official website of Intellectual Property Office for details.
In addition, you can apply for partial fee reduction.
Agency fee: the current market price of the utility model is about 1500-2000, and the invention patent is more than 4000.
I can do it for you. The utility model only needs 600 yuan, invention patent 1500 yuan.
Work first, then collect money. This is a guarantee.
Time problem:
Utility model patents and design patents can generally be taken down in 6-8 months.
Invention patents generally take 2.5-3 years to come down.