In 1962, roughly two years after the introduction of the Super Blue blade, Wilkinson Sword introduced the world's first razor blade made from stainless steel. According to users, the blade stayed sharp about three times longer than the best carbon steel blades – including Gillette's. Wilkinson's introduction took Gillette by surprise and the company struggled to respond as its smaller rivals, Schick and the American Safety Razor Company, came out with their own stainless steel blade. However, during the development of the silicon coating for the Super Blue blade, Gillette had also discovered the method of producing coated stainless steel blades that Wilkinson Sword was using and managed to patent it before Wilkinson did. The English company was forced to pay royalty to Gillette for each blade it sold.