C21D9/44 - CPC Classification Index

ClassID:

119097 ⎘

C21D9/44 - CPC Classification

Classification description:

Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for equipment for lining mine shafts, e.g. segments, rings or props

Recent Application in this class:

20260117335

2026-04-30

Drill String Component With High Corrosion Resistance, And Method For The Production Of Same

20220033924

2022-02-03

DRILL STRING COMPONENT WITH HIGH CORROSION RESISTANCE, AND METHOD FOR THE PRODUCTION OF SAME

20180258515

2018-09-13

Enhanced wear resistant steel and methods of making the same

20170292515

2017-10-12

Precipitation hardened martensitic stainless steel and reciprocating pump manufactured therewith

20150101714

2015-04-16

Recrystallization, refinement, and strengthening mechanisms for production of advanced high strength metal alloys

20150090372

2015-04-02

Recrystallization, Refinement, and Strengthening Mechanisms For Production Of Advanced High Strength Metal Alloys

20100065168

2010-03-18

Fire resistant steel excellent in high temperature strength, toughness, and reheating embrittlement resistance and process for production of the same