McDonald's loses "Big Mac" trademark as EU court sides with Irish rival Supermac's

McDonald's lost a European Union trademark dispute over the Big Mac name after a top European Union court sided Wednesday with Irish fast-food rival Supermac's in a long-running legal battle.

The EU General Court said in its judgment that the U.S. fast-food giant failed to prove that it was genuinely using the Big Mac label over a five-year period for chicken sandwiches, poultry products or restaurants.

The Big Mac is a hamburger made of two beef patties, cheese, lettuce, onions, pickles and Big Mac sauce. It was invented in 1968 by a Pennsylvania franchisee who thought the company needed a sandwich that appealed to adults.