2010 65438+February 21-20 20 10 65438+2+February 20.
This is the first year.
201165438+February 21-201265438+February 20.
That was the second year.
20 12 12 2 1 -20 13 12 20.
This is the third year.
20 13 12 2 1 -20 14 12 20.
This is the fourth year.
Since the patent annual fee needs to be paid before the expiration of the previous year, you need to pay the annual fee of the fourth year before the expiration of the third year.
The annual patent fee is only postponed for the first three times. Your annual fee for the first three years is paid as a delay fee, so you will not delay in the fourth year.
1-3 years old 600 yuan, a utility model, slowly became 90 yuan. 4-5 years is 900 yuan. I didn't recover, so I paid 900 yuan.
6-8 years is 1200,
9- 10 is 2000.