Four U.S. patents for developments in flexible graphite technology have been awarded to Graftech International Ltd., Wilmington, Del. The patents describe advances in three company specialties: fuel cells, electronic thermal management (ETM) and industrial heat management (IHM). The IHM development (U.S. Patent 6,413,601) is an insulation system for high-temperature furnaces that Graftech says combines the conductive properties of flexible graphite with the insulating properties of other materials.