(1) The borrower shall return the object borrowed at the time agreed upon by the parties.
(2) If no time for the return of the object borrowed has been stipulated by the parties, the borrower shall return the object when he has completed the use thereof and the taking of profits therefrom in conformity with the purpose specified in the contract or the nature of the subject matter; provided, the lender may rescind the contract for the future at any time after a reasonable period has elapsed to allow for the specified use of the object and the taking of profits therefrom.