Corn flakes, or cornflakes, are a breakfast cereal made from toasting flakes of corn (maize). The cereal, originally made with wheat, was created by William Kellogg in 1894 for patients at the Battle Creek Sanitarium where he worked and his brother John Kellogg was superintendent. The breakfast cereal proved popular among the patients and Kellogg subsequently started what became the Kellogg Company to produce corn flakes for the wider public. A patent for the process was granted in 1896, after a legal battle between the two brothers.