Inevitable intellectual property will answer for you:

Application time of American invention patent:

1. The applicant receives the acceptance notice 1-2 months from the application date;

2. The applicant receives the public notice within 18 months from the application date (or priority date);

3. The applicant shall reply (substantive examination) after receiving the notice of examination opinions, and the substantive examination time is about 1 year;

4. authorization and announcement.

Application time of American design patent:

1. The applicant receives the acceptance notice within 1-2 months from the application date;

2. Notice of review opinions may be received within one year;

3. authorization (about 1.5 years).

to sum up, the application time for invention patents in the United States is about 2-3 years, and that for design patents in the United States is about 1.5 years.

I hope the above contents can help you.