At first, Epperson named his frozen snack the "Epsicle", and it became popular with his school friends. In 1923, while running a lemonade stand at an amusement park in Oakland, California, Epperson realized that he could earn money from his invention. Epperson changed the name of his treat to "Popsicle", after his children always asked for "Pop’s ’sicle", and signed up for a patent. The patent for frozen ice on a stick was issued August 19, 1924.