removing part of introduction per WP:LEAD - the introduction should summarize the content of the article, it should not introduce something that appears nowhere in the body of the article
'''First to file''' (FTF) and '''first to invent''' (FTI) are legal concepts that define who has the right to the grant of a [[patent]] for an [[invention]]. Since 16 March 2013, after the USA abandoned its "first to invent/document" system, all countries operate under "first-to-file" patent priority requirement.<ref>{{cite news |title=Patent Reform Refuses To Die, Congress Keeps Cashing In |author=Zach Carter |url=http://www.huffingtonpost.com/2011/09/06/patent-reform-drags-on_n_951128.html |newspaper=The Huffington Post |date=11 June 2011 |access-date=31 July 2013}}</ref>
There is an important difference between the strict nature of the FTF(First to file) under the [[European Patent Office|European Patent Office (EPO)]] and the FITF (First inventor to file) system of the [[United States Patent and Trademark Office|United States Patent and Trademark Office (USPTO)]]. The USPTO FITF system<ref name=usptopressrel>[http://www.patentdocs.org/2013/02/uspto-issues-first-inventor-to-file-examination-guidelines-and-final-rule.html Zuhn: "USPTO Issues First-Inventor-to-File Examination Guidelines and Final Rule"]</ref> affords early disclosers some "grace" time (1 year) before they need to file a patent,<ref name=kravets/> whereas the EPO does not recognise any grace period, so early disclosure under the FITF provisions is an absolute bar to later EPO patent.
