Maeil Economic Daily, June 24, 2003SK chemicals＇ Trademark "SKY" Brings A Cash Windfall.On the 23rd, SK chemicals announced that it had sold some of the SKY brands it owns to SKYTEAM, the airline alliance formed by Korea Air, Delta Airlines and Air France, for USD 50,000.SKY brand has been a registered trademark by SK chemicals since 1968, when the company, then still operating under the name of Sunkyung Synthetic Fiber Manufacturing Co., Ltd. obtained exclusivity rights to the brand, in conjunction with its launching of SKYRON, a polyester fiber, in collaboration with SK."SKY brand is protected in 90% of all existing product and service categories in Korea,? a company official says. ?The estimated worth of the trademark is 10 to 50 billion won.??If another company wishes to use this brand, it must request permission from SK chemicals,? he stressed.