By Martinne Geller Reuters September 6, 2012 (Reuters) - LBP Manufacturing Inc, a supplier of packaging to coffee chains including Starbucks and Dunkin' Donuts, will soon sell filters for single-serve coffee, another move in the expected onslaught of competition for Green Mountain Coffee Roasters Inc. Matt Cook, president of the privately held company, said the product, called the UpShot, will launch in the fall. He declined to identify the brands that will use LBP's technology, saying it was premature. Cook said the UpShot would be recyclable and could be tailored to the needs of customers, which could range from private label manufacturers of single-serve coffee cups to other coffee brands not yet selling single-serve portions. The U.S. market for single-serve coffee is dominated by Green Mountain and its Keurig system, but the expiration this month of certain patents related to the design of its "K-Cups" has opened the door to a host of low...