Önder, MEkinci, Z2025-04-102025-04-100170-4214http://hdl.handle.net/20.500.14701/35737In this study, by using the concepts and results on spherical curves in dual Lorentzian space, we give the criterions for ruled surfaces with non-lightlike ruling to be closed (periodic). Moreover, we obtain the necessary and sufficient conditions to guarantee that a timelike or a spacelike ruled surface is closed (periodic). Copyright (C) 2016 JohnWiley & Sons, Ltd.EnglishArticle1099-1476