Fans of this chain know they can get quite a burger at the place with the orange and white roof. Whataburger Restaurants is a leading regional hamburger chain with nearly 750 outlets in Texas and about 10 other states in the South and Southwest. The restaurants are open 24 hours a day and serve burgers and fries along with chicken sandwiches, salads, and a breakfast menu. About 600 of the restaurants are company-owned. Loyal Whataburger fans can also don the company's line of apparel sporting the chain's logo. The late Harmon Dobson founded the family-owned chain in Corpus Christi, Texas, in 1950 with a single roadside burger stand.