Crucible Patents

"Crucible is the giant of the alloy tool steel producers. The importance of Crucible Steel, therefore, is portentous.  The last war (World War I), it has been said, was won by American machine tools. The tungsten-chromium-cobalt alloys so raised the speed of cutting tools that the capacity of shell-turning machines was jumped a spectacular 50%. " - Fortune, November 1939
 
This quotation from Fortune Magazine is a testament to Crucible’s tool steel patent portfolio.  For over 133 years our pioneering work in the development of tool steels and high speed steels not only shaped the future of our company but helped determine the future of our nation, as well.
 
Over the years, Crucible has been granted patents for a broad range of metallic materials including: Tool Steels, High Speed Steels, Bearing Steels, Stainless Steels, Mold Steels, Valve Steels, Nickel Base Alloys, Cobalt Base Alloys, Tungsten Base Alloys, Titanium Base Alloys, Magnetic Alloys and Composites.  In addition to these material patents, Crucible owns various process and product patents.

Crucible Industries patents include, but are not limited to, the following U.S. Patent Numbers: 5,435,824; 5,447.800; 5,522,914; 5,679,908: 5,830,287; 5,900,560; 5,936,169; 5,976,459; 5,989,490; 6,057,045; 6,077,476; 6,099,796; 7,288,157; 7,615,123; and 7,651,575 (jointly held).