A Russian IT company contacted me when they received preliminary rejections from the USPTO on their patent applications in the US. U.S. patent attorneys did not see any way to address the examination comments. After analyzing the files and relevant rules governing the conduct of patent examination in the U.S., we drafted responses to the preliminary rejections and obtained patents on both applications. In this case, one of the applications managed not to change the claims at all, the changes in the second application did not significantly affect the scope of patent protection.