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Class Information
Number: 420/36
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > Cobalt containing
Description: Alloy or metallic composition which additionally contains cobalt.

Sub-classes under this class:

Class Number Class Name Patents
420/37 Molybdenum or tungsten containing 39

Patents under this class:

Patent Number Title Of Patent Date Issued
8034197 Ultra-high strength stainless steels Oct. 11, 2011
7297214 Free cutting alloy Nov. 20, 2007
7294214 Medical devices Nov. 13, 2007
7211159 Ferritic heat-resistant steel and method for production thereof May. 1, 2007
6841122 Hot working die steel excelling in molten corrosion resistance and strength at elevated temperature and member for high temperature use formed of the hot working die steel Jan. 11, 2005
6737018 Corrosion-resistant chromium steel for architectural and civil engineering structural elements May. 18, 2004
6419878 Fe-Cr alloy having excellent initial rust resistance, workability and weldability Jul. 16, 2002
6355212 Alloy for corrosion-resistant coatings or surface coatings Mar. 12, 2002
6221183 High-strength and low-thermal-expansion alloy, wire of the alloy and method of manufacturing the alloy wire Apr. 24, 2001
6207103 Fe-Cr-Si steel sheets having excellent corrosion resistance and method for manufacturing the same Mar. 27, 2001
6174385 Ferritic heat resistant steels Jan. 16, 2001
5911842 Heat resisting steel and steam turbine rotor shaft and method of making thereof Jun. 15, 1999
5888318 Method of producing ferritic iron-base alloys and ferritic heat resistant steels Mar. 30, 1999
5514328 Cavitation erosion resistent steel May. 7, 1996
5501834 Nonmagnetic ferrous alloy with excellent corrosion resistance and workability Mar. 26, 1996
5350559 Ferrite steel which excels in high-temperature strength and toughness Sep. 27, 1994
5340534 Corrosion resistant austenitic stainless steel with improved galling resistance Aug. 23, 1994
5296054 Austenitic steel Mar. 22, 1994
5096514 Heat-resistant ferritic cast steel having excellent thermal fatigue resistance Mar. 17, 1992
5051233 Stainless wrought and cast materials and welding additives for structural units exposed to hot, concentrated sulfuric acid Sep. 24, 1991
4957550 Ultrasonic machining tool for machining orthodontic brackets Sep. 18, 1990
4948556 Piston ring material and piston ring Aug. 14, 1990
4933027 Iron-based shape-memory alloy excellent in shape-memory property, corrosion resistance and high-temperature oxidation resistance Jun. 12, 1990
4865661 Product of a high-strength nitrogen containing fully austenitic cobalt steel having yield strengths above 600 N/MM2 Sep. 12, 1989
4751046 Austenitic stainless steel with high cavitation erosion resistance Jun. 14, 1988
4720435 Nuclear grade steel articles Jan. 19, 1988
4668310 Amorphous alloys May. 26, 1987
4666733 Method of heat treating of wear resistant coatings and compositions useful therefor May. 19, 1987
4643767 Nuclear grade steels Feb. 17, 1987
4615658 Shroud for gas turbines Oct. 7, 1986
4616154 Cathode ray tube having an Fe-Co-Cr shadow mask and method of manufacturing such a shadow mask Oct. 7, 1986
4588440 Co containing austenitic stainless steel with high cavitation erosion resistance May. 13, 1986
4586969 Fe-Ni-Ti-Co alloy with shape memory effect and pseudo-elasticity and method of producing the same May. 6, 1986
4487630 Wear-resistant stainless steel Dec. 11, 1984
4434006 Free cutting steel containing controlled inclusions and the method of making the same Feb. 28, 1984
4362553 Tool steels which contain boron and have been processed using a rapid solidification process and method Dec. 7, 1982
4318733 Tool steels which contain boron and have been processed using a rapid solidification process and method Mar. 9, 1982
4236919 Magnetic alloy Dec. 2, 1980
4218243 Fully martensitic steel for a metal mold for molding glass and the metal mold Aug. 19, 1980
4207381 Bimetal and method for manufacturing the same Jun. 10, 1980
4171978 Iron/chromium/cobalt-base spinodal decomposition-type magnetic (hard or semi-hard) alloy Oct. 23, 1979

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