The bailor cannot demand the return of the thing loaned till after the expiration of the period stipulated, or after the accomplishment of the use for which the commodatum has been constituted. However, if in the meantime, he should have urgent need of the thing, he may demand its return or temporary use. In case of temporary use by the bailor, the contract of commodatum is suspended while the thing is in the possession of the bailor. (1749a)