In this paper, we present a characterization of the complement of the set of points of a hyperbolic quadric of PG(3, q). As a byproduct we obtain a generalization of a recent result of B. Sahu A characterisation of the planes meeting a hyperbolic quadric of PG(3, q) in a conic, Austral. J. Combin. 84 (1), (2022) 178-186 characterizing the set of non tangent planes to a hyperbolic quadric of PG(3, q).
Vito Napolitano (Wed,) studied this question.