The short story here is that Sliders were first made by a hamburger chain called White Caslte. They were nicknamed Sliders and later on they copyrighted the name Slyders.

White Castle was founded in 1921 in Wichita, Kansas. Walter A. Anderson partnered with cook Edgar Waldo "Billy" Ingram to make White Castle into a chain of restaurants and market

White Castle. At the time, Americans were hesitant to eat ground beef after Upton Sinclair's 1906 novel The Jungle had publicized the poor sanitation practices of the meat packing industry. The founders set out to change the public's perception of the cleanliness of the industry.

They were very small burgers that were sold at five cents a piece until the 1940s, and remained at ten cents for years thereafter while growing smaller. For several years, when the original burgers sold for five cents, White Castle periodically ran promotional ads in local newspapers which contained coupons offering five burgers for ten cents, takeout only.