Tampa — TradeMark Nitrogen, a manufacturer of liquid nitrogen products based in Tampa, Fla., is celebrating its 30th anniversary this year. “In any business, 30 years is a significant accomplishment, but this is a story that’s about much more than longevity,” said Rick Brandt, Trademark CEO. “This is a story about continuing to keep your eye on the market and evolving to delight your customers.” Formed in March 1983, TradeMark produces ammonium nitrate and magnesium nitrate solutions, with plans to expand into manganese and zinc solutions. The company’s roots go back to Southern Nitrogen Company, which was formed in 1954 and later merged with Kaiser Aluminum and Chemical Corporation in 1966. TradeMark Nitrogen Corporation was spun from Kaiser as an independent company in 1983. “You don’t last 30 years without staying in touch with your customers,” said Mike Barry, president of TradeMark Nitrogen. “We have to continue to look for new opportunities, questioning the status quo and looking for areas to improve our business activities.” TradeMark will mark its 30th with a commemorative paint scheme on the TMN #31 car at the NASCAR Nationwide Series race on July 5 in Daytona, Fla.