quotation averages and ranges
with US Patent Office fees for small entities (up to 250 employees):
patent searches $900 average; $600 - $1,200;
provisionals $690 average; $390 - $990 ($110 filing fee);
PCT conversions $900 average; Chapter I & II (+ >$4,300);
full US application $2,700 average; $1,800 - $3,600 (+ $462);
petition to expedite $570 average; $370 - $770 ($130 filing fee);
prosecution $600 average; $300 - $900 per full response;
issue fee $245 transmittal ($755).