Applying for a patent in the United States is a dialogue, largely in writing, between the applicant and the Patent and Trademark Office (PTO). The PTO must keep applications secret for at least 18 months after filing, following which most are published. Until the patent issues or the application is published, the dialogue is secret, conducted out of public view. Only the applicant, the applicant's lawyer(s) and an often overworked patent examiner know the application was filed or have a say in whether a patent will issue. Others knowledgeable about the invention's field have no opportunity to comment or present evidence and arguments on whether an invention deserves patent protection.