U.S. Gov't Patent Fees
large - small - micro
Filing fee (basic+search+exam.)$1600
Each claim over 20$80
Each independent claim over 3$420
Any multiple dependent claim?$780
Extension - 1 month$200
Extension - 2 months$600
Extension - 3 months$1400
R.C.E.$1200
Noting appeal$800
Issue fee$960
Maintenance 4th year$1600
Maintenance 8th year$3600
Maintenance 12th year$7400

For other fees, see the PTO's fee page