Custom Glass Products of Carolina Inc. has won patent-infringement cases against two competitors in Georgia over its Decralite product, a decorative window grid sealed between panes of glass.
Salisbury, N.C.-based Custom Glass holds two patents to make the seamless window grids, or muntins, by using a computer numerically controlled router to form grid patterns from a sheet of plastic. Custom Glass President Steve Reeder said Primex Plastics Corp. of Richmond, Ind., is the company's main supplier of polystyrene sheet. The muntins are then painted and heat cured to protect against ultraviolet light and chemical outgassing.
Custom Glass won patent cases against Infini-Lite LLC of Tucker, Ga., and Collins Custom Millworks Inc. of Marietta, Ga. The company won an $8 million judgment against Infini-Lite.
The rulings in U.S. District Court in Atlanta included permanent injunctions barring both companies from making the products.
Officials from Infini-Lite and Collins Custom Millworks could not be reached for comment.
Judge Richard Story handled both cases, which included requests to have the U.S. Patent and Trademark Office examine the patents.
Custom Glass sued Collins Custom Millworks in 2003. Collins countersued. Then in mid-2009, the judge issued a permanent injection against Collins.
Officials of Infini-Lite initiated the other court action, suing Custom Glass in 2004, saying Custom Glass officials had paid them a personal visit and sent a follow-up letter demanding that they stop making the Infini-Lite window muntin.
Custom Glass countersued, charging Infini-Lite with patent and trademark infringement. Custom Glass charged that the Infini-Lite brand name caused confusion in the market for Decralite.
The judge ruled in favor of Custom Glass and dismissed the case in 2009, saying that, since 2006, Infini-Lite had not been represented by a lawyer.
On May 10 of this year, the judge slapped an $8 million judgment against Infini-Lite and ordered a permanent injunction on the product and trademark issues.
Custom Glass issued a news release announcing its legal victories.