头十一年是5200， 后九年是7400，总共1.2万，一年六百，似乎不是很贵

估计贵的是律师费，不知道怎么被涮了，还年年缴费？

https://www.uspto.gov/learning-and-resources/fees-and-payment/uspto-fee-schedule

 

551/2551/3551	1.20(e)	Due at 3.5 years	1,600.00	800.00	400.00
1552/2552/3552	1.20(f)	Due at 7.5 years	3,600.00	1,800.00	900.00
1553/2553/3553	1.20(g)	Due at 11.5 years	7,400.00	3,700.00	1,850.00