instantaneous seisin

The doctrine that a transitory seisin for an instant, when the same act which conveys an estate to a person conveys it away from him, is not a seisin to "abide" in him, that is, to be in him "beneficially for his own use," which will permit such a right as dower, homestead, mechanic's lien or vendor's lien, to attach to the land. Lassen v Vance, 8 Cal 271; Libbey v Tidden, 192 Mass 175, 183.