Filing and prosecuting patents is considered a strategic investment and is quite an expensive process. In the US, filing a provisional patent application can cost between $1,000 to $3,500 and filing a utility patent application can cost between $5,000 to $9,000 while prosecuting and obtaining an issued patent may grow closer to a total cost of $40,000 to $50,000. The fixed filing fees and the variable attorney fees are the biggest cost driver.
Furthermore, filing and obtaining patents in foreign countries will typically exceed the previously stated estimates. Usually, once a patent is issued in the US or in foreign countries, maintenance fees are required to be paid over the life of the patent to avoid the patent being considered “abandoned” and unenforceable.