Prosecution Pointer 403 By Publisher on December 6, 2023 Email this postTweet this postLike this postShare this post on LinkedIn In the USPTO’s Patent Center, registered users can upload PDF, .docx, .txt and .zip files into Patent Center. For a PDF, the maximum file size is 25MB; for .docx, the maximum size is 10MB; and for .zip and .txt files, there is a maximum of 50MB. Read more