Patent Research Fees Knock-out Searches Fees start at $300 for US patent applications and grants for English language research on up to three independent claims. $150 per independent claim in excess of three. Additional fees for foreign jurisdictions and foreign language applications and grants. Fee credited towards follow-on research fees for Freedom to Operate or Patentability research if performed within 30 days of the Knock-out search. Freedom to Operate Fees start at $600 for US patent English language research. Fees vary depending upon technology, number of claims and patent class. Additional fees for foreign jurisdictions and foreign language applications and grants. Fee credited towards follow-on research fees for Patentability if performed within 30 days of the Freedom to Operate research. Patentability Research Fees typically range between $ 750 and $1,500 for US patent English language research. Additional fees for foreign jurisdictions and foreign language applications and grants. Patent Invalidity Research Fees start at $750 for US patent English language research on up to three independent claims. $150 per independent claim in excess of three. Fees vary depending upon technology area, depth or breadth of the technology and number of patent classes. Additional fees for scientific, technical, academic, trade, industrial and business publications research.