ClassID:

120467

C23C22/30 - CPC Classification

Classification description:

Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also trivalent chromium

Recent Application in this class:
#1
20230140575
2023-05-04

METHOD FOR PRODUCING RUST-PROOF MEMBER

#2
20230107608
2023-04-06

CONVERSION COATING FOR CANS CONTAINING HYDROGEN SULFIDE PRODUCING LIQUIDS

#3
20220349062
2022-11-03

HYDROPHILIC STAINLESS STEEL AND METHOD FOR MANUFACTURING SAME

#4
20210388504
2021-12-16

Surface treatment solution composition containing trivalent chromium and inorganic compound, and method for manufacturing hot dip galvanized steel sheet surface-treated using same

#5
20210130961
2021-05-06

High-design sliding member

#6
20200362461
2020-11-19

Metallic material surface treatment agent, metallic material having surface treatment coating, and manufacturing method therefor

#7
20200072405
2020-03-05

Threaded connection for oil country tubular goods and method for producing threaded connection for oil country tubular goods

#8
20200040464
2020-02-06

AQUEOUS SOLUTION AND METHOD FOR IMPROVING CORROSION RESISTANCE OF A CR(III) CONVERSION COATING AND MODIFIED CR(III) CONVERSION COATING

#9
20190330744
2019-10-31

Process for the manufacturing of a steel strip for packaging and associated equipment

#10
20170275730
2017-09-28

Hearth roll for continuous annealing furnaces, and method for manufacturing same

#11
20170226644
2017-08-10

Corrosion-resistant trivalent-chromium chemical conversion coating and solution for trivalent-chromium chemical treatment

#12
20170107626
2017-04-20

Process for the manufacturing of a steel strip for packaging and associated equipment

#13
20140305903
2014-10-16

Method for manufacturing a bonded body of galvanized steel sheet and adherend

#14
20130011694
2013-01-10

Steel sheet for container excellent in corrosion resistance

#15
20110008644
2011-01-13

BONDED BODY OF GALVANIZED STEEL SHEET AND ADHEREND, AND MANUFACTURING METHOD THEREOF

#16
20100203327
2010-08-12

Corrosion-resistant trivalent-chromium chemical conversion coating and solution for trivalent-chromium chemical treatment

#17
20090020185
2009-01-22

Aqueous treating solution for forming black trivalent-chromium chemical conversion coating on zinc or zinc alloy and method of forming black trivalent-chromium chemical conversion coating

#18
20070089808
2007-04-26

Liquid trivalent chromate for aluminium or aluminium alloy and method for forming corrosion-resistant film over surface of aluminium or aluminium alloy by using same