Alden Francis Leo Harris

Washington Mills Group, Inc. manufactures and distributes of abrasive materials and fused mineral products. Its products are alumina bubble, and zircinia, brown fused aluminium oxide, cryolite, emery, ferro silicon, iron pyrite, magnesia chrome, silicon carbide, spinel, sulfur cake, ultra high purity silicon carbide, and zirconia. The company was founded in 1868 and is headquartered in North Grafton, MA.

Washington Mills Co., Inc. manufactures and distributes abrasive materials and fused mineral products. The company offers abrasive grains and specialty electro-fused minerals ranging from macro grits to micro grits and custom specialty fusions. Washington Mills was founded in 1868 and is headquartered in North Grafton, MA.

Washington Mills AS manufactures and processes silicon carbide crude and micro grits. The company was founded on June 13, 2006 and is headquartered in Orkanger, Norway.

Washington Mills Hennepin, Inc. produces and distributes metallurgical grade silicon carbide. It manufactures and distributes a range of products in different grains and powder sizes: alumina bubbles, alumina-silica fines, alumina-zirconia, boron carbide, brown aluminum oxide and chrome-alumina. The firm’s services include laboratory testing service, new product development and recycling. The company was founded in 1868 and is headquartered in Hennepin, IL.