Patent Applications for HPHT

Both General Electric and De Beers have filed for world patents on the high-pressure, high-temperature diamond-treatment process. GE's two patents include one for creating fancy yellowish-green, greenish-yellow, and neon yellow-green diamonds from brownish type Ia diamonds (#WO 0114050 High Pressure/High Temperature Production of Colored Diamonds). These are the types of colors formerly produced by NovaDiamond in Provo, Utah, before it left the gem diamond market. A second patent filing is for the identification process of HPHT diamonds (#WO 0133203 Method of Detection of Natural Diamonds That Have Been Processed at High Pressure and High Temperatures). Michelle Kalina, marketing director for GE's Gem Technologies division, says the jewelry industry shouldn't be concerned about patents filed by General Electric. "GE, as a technological leader in many industries, has thousands of patent
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