How much do American patents cost each year?

In order to maintain patents in any country, an annual fee must be paid to the intellectual property office of the corresponding country every year.

Among them, the annual fees for American patents are as follows:

In addition, for unauthorized U.S. patents, in addition to the official fees, the initial filing fees often need to be paid by the U.S. patent agency (calculated by time limit), so the fees are mainly spent in the early stage. Later, the annual maintenance fee will be less.