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 |
