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Class Information
Number: 420/65
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > 0.25 percent or more nitrogen containing
Description: Alloy or metallic composition which additionally contains 0.25 percent or more nitrogen.










Sub-classes under this class:

Class Number Class Name Patents
420/66 Group iv or v transition metal containing 22


Patents under this class:

Patent Number Title Of Patent Date Issued
8623108 Wear-resistant material Jan. 7, 2014
8562758 Austenitic-ferritic stainless steel Oct. 22, 2013
8440136 Steel alloy and tools or components manufactured out of the steel alloy May. 14, 2013
8337748 Lean austenitic stainless steel containing stabilizing elements Dec. 25, 2012
8313691 Lean austenitic stainless steel Nov. 20, 2012
8182963 Low-cost manganese-stabilized austenitic stainless steel alloys, bipolar plates comprising the alloys, and fuel cell systems comprising the bipolar plates May. 22, 2012
8025839 Steel alloy and tools or components manufactured out of the steel alloy Sep. 27, 2011
7892366 Duplex stainless steel alloy and use thereof Feb. 22, 2011
7658883 Interstitially strengthened high carbon and high nitrogen austenitic alloys, oilfield apparatus comprising same, and methods of making and using same Feb. 9, 2010
7601230 Medical devices Oct. 13, 2009
7455811 Brazing material and brazed products manufactured therewith Nov. 25, 2008
7347903 Duplex stainless steel for urea manufacturing plants Mar. 25, 2008
7181847 Process for manufacturing a cylindrical hollow body and hollow body made thereby Feb. 27, 2007
6783727 Austenitic steel Aug. 31, 2004
6761777 High chromium nitrogen bearing castable alloy Jul. 13, 2004
6749697 Duplex stainless steel Jun. 15, 2004
6689231 Use of stainless steel alloy as umbilical tubes in seawater environment Feb. 10, 2004
6673165 High-hardness martensitic stainless steel excellent in corrosion resistance Jan. 6, 2004
6620377 High hardness stainless steel for screws used in magnetic memory devices Sep. 16, 2003
6551420 Duplex stainless steel Apr. 22, 2003
6488786 High-strength, high-toughness martensitic stainless steel sheet Dec. 3, 2002
6093233 Ferritic stainless steel and external part for a watch made thereof Jul. 25, 2000
6051081 Austenitic-ferritic steel of the superduplex type applicable to the fabrication of seamless tubes Apr. 18, 2000
5882584 Interdental brush wire and interdental brush Mar. 16, 1999
5714115 Austenitic steel alloy Feb. 3, 1998
4957700 High strength non-magnetic stainless steel Sep. 18, 1990
4865661 Product of a high-strength nitrogen containing fully austenitic cobalt steel having yield strengths above 600 N/MM2 Sep. 12, 1989
4832765 Duplex alloy May. 23, 1989
4814140 Galling resistant austenitic stainless steel alloy Mar. 21, 1989
4798635 Ferritic-austenitic stainless steel Jan. 17, 1989
4765953 High nitrogen containing duplex stainless steel having high corrosion resistance and good structure stability Aug. 23, 1988
4711677 High temperature bushing alloy Dec. 8, 1987
H326 Mn-Fe base and Mn-Cr-Fe base austenitic alloys Sep. 1, 1987
4675156 Structural austenitic stainless steel with superior proof stress and toughness at cryogenic temperatures Jun. 23, 1987
4116683 Nickel-free austenitic corrosion-resistant steel Sep. 26, 1978
3990892 Wear resistant and heat resistant alloy steels Nov. 9, 1976
3969109 Oxidation and sulfidation resistant austenitic stainless steel Jul. 13, 1976











 
 
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