the claiming by an applicant in a nonprovisional application of a benefit of
an inventiondisclosed in a prior-filed copending (under examination at the same time)provisional or nonprovisional application, or international application designating the U.S. for the purposes of securing an earlier-effective filing date for the nonprovisional application.
-- see 35 USC § 119(e), 120, 121 and 365(c) for more