4002 Treatment or processing of metal materials (Class 40 similar group): items and numbers

Notes on similar group 4002

Official notes (CNIPA Table of Similar Goods and Services, 2026 text; J&C reference translation)

1. This similar group is similar to polishing, milling, laminating, grinding, grinding and polishing, sandblasting services, material-planing treatment and material-sawing services in 4001;

2. tin-plating is similar to retinning in 3713.

Practice notes (J&C)

This group is electroplating, chromium-plating, tin-plating, soldering, metal treatment, metal tempering, magnetising, etc. Official notes: this group is similar to polishing, milling, laminating and grinding in 4001; tin-plating is similar to retinning in 3713. Custom manufacture of metal is filed under “metal treatment” (400042) in this group, and electroplating equipment is in 0754 of Class 7 (practical tip). No additions or deletions to this group in 2026.

Applies to the 2026 edition · Published 2026-10-09 · Reviewed 2026-10-09

Data version: CNIPA Table of Similar Goods and Services, 2026 text (based on the 13th edition of the Nice Classification, NCL 13-2026, in force since 1 January 2026). Chinese terms, groups and numbers follow the official text; English and Spanish terms are taken from WIPO, while CNIPA-specific items (C numbers) carry reference translations, whose English was fully revised on 8 October 2026. NCL 13-2027 enters into force on 1 January 2027. Selected reference translations were revised on 13 October 2026.

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Class	Group	Item No.	Chinese	English
40	4002	400043	金属回火	metal tempering
40	4002	400029	铁器加工	blacksmithing
40	4002	400013	镀镉	cadmium plating
40	4002	400017	镀铬	chromium plating
40	4002	400099	锅炉制造	boilermaking
40	4002	400026	电镀	electroplating
40	4002	400034	镀锌	galvanization
40	4002	400024	涂金	gilding
40	4002	400085	镀金	gold plating
40	4002	400108	配钥匙	key cutting
40	4002	400086	激光划线	laser scribing
40	4002	400004	磁化	magnetization
40	4002	400100	金属铸造	metal casting
40	4002	400042	金属处理	metal treating
40	4002	400031	铣削加工	millworking
40	4002	400045	镀镍	nickel plating
40	4002	400018	金属电镀	metal plating
40	4002	400093	精炼	refining services
40	4002	400007	镀银	silver plating
40	4002	400011	锡焊	soldering
40	4002	400027	镀锡	tin plating
40	4002	400125	焊接服务	welding services