(1) The unpaid seller of goods loses his lien thereon—
(a) when he delivers the goods to a carrier or other bailee for the purpose of transmission to the buyer without reserving the right of disposal of the goods;
(b) when the buyer or his agent lawfully obtains possession of the goods;
(c) by waiver thereof.
(2) The unpaid seller of goods, having a lien thereon, does not lose his lien by reason only that he has obtained a decree for the price of the goods. Stoppage in transit