WD Sues Diamond Growers over CVD Patents

RAPAPORT... The companies behind WD Lab Grown Diamonds have filed three lawsuits against competitors, accusing them of infringing patents for diamond synthesis and treatment. The Carnegie Institution of Washington, a science organization, and M7D Corporation, which trades as WD Lab Grown Diamonds, took action Thursday again six companies that produce or sell diamonds made using chemical vapor deposition (CVD). One of the complaints targets Pure Grown Diamonds (PGD) and IIa Technologies, which produces CVD goods for PGD. A second filing is against Mahendra Brothers, a De Beers sightholder, and its affiliate, Fenix Diamonds. The third suit takes aim at Altr, another lab-grown supplier, and its owner, R.A. Riam.Carnegie invented and patented a version of CVD, known as microwave-plasma CVD (MPCVD), that can create a purer diamond because it doesn't involve electrodes, which often contaminate the product, according to the lawsuits. It also patented a method for enhancing a stone's visual characteristics through heat treatment at high pressure and temperature. M7D holds the license to both patents, the three similar lawsuits continued."The existence of the patents...are well-known in the lab-grown diamond industry, and in particular are well-known by lab-grown diamond manufacturers, importers and sellers," Carnegie and M7D claimed.Carnegie and M7D are seeking damages and a judgment declaring that the six companies violated their patents. The companies were not available for comment Sunday. Image: A 9.04-carat round brilliant produced by WD Lab Grown Diamonds in 2018 using chemical vapor deposition. (WD Lab Grown Diamonds)