The McDonald’s product name trademarked in 1967 after being created in Pittsburgh was Big Mac.
Franchisee Jim Delligatti developed the sandwich at his McDonald’s restaurant in the Pittsburgh area. He wanted a larger burger that could compete with other substantial sandwiches being sold by nearby restaurants. The product used two beef patties, a middle bun layer, lettuce, cheese, pickles, onions, and sauce.
McDonald’s introduced the Big Mac nationally in 1968, after regional testing. Its stacked construction and distinctive name made it useful not only as a menu item but also as a durable international brand symbol.
The name is sometimes confused with the year of national launch. The trademark date is 1967, while the national introduction is generally dated 1968.