of iron or steel

Industry

CPC
C25F3/06

This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

CCHEMISTRY METALLURGY C25Electrolytic processing C25FPROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS APPARATUS THEREFOR C25F3/00Electrolytic etching or polishing

Current Industry

C25F3/06of iron or steel

Industries

Patents Grantslast 30 patents

Information Patent Grant
Grain-oriented electrical steel sheet
- Patent number 11,990,261
- Issue date May 21, 2024
- JFE Steel Corporation
- Yoshihisa Ichihara
- C21 - METALLURGY OF IRON
Information Patent Grant
Stainless steel for fuel cell separator plate and manufacturing met...
- Patent number 11,923,580
- Issue date Mar 5, 2024
- POSCO CO., LTD
- Kwang Min Kim
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
System and method for machining workpiece and article machined ther...
- Patent number 11,745,279
- Issue date Sep 5, 2023
- General Electric Company
- Yong Yang
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method for forming holes, metal product, and metal composite
- Patent number 11,649,557
- Issue date May 16, 2023
- Fulian Yuzhan Precision Technology Co., Ltd
- Wen-Cheng Zhu
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Metal article, method for manufacturing the metal article, and meta...
- Patent number 11,629,428
- Issue date Apr 18, 2023
- Fulian Yuzhan Precision Technology Co., Ltd
- Kar-Wai Hon
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Production method for stainless steel sheet for fuel cell separators
- Patent number 11,618,967
- Issue date Apr 4, 2023
- JFE Steel Corporation
- Takayoshi Yano
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method of producing an electrocatalyst
- Patent number 11,542,615
- Issue date Jan 3, 2023
- Hymeth APS
- Sumon Bishwas
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Dissolving metal supports in 3D printed metals and ceramics using s...
- Patent number 11,504,770
- Issue date Nov 22, 2022
- Arizona Board of Regents on behalf of Arizona State University
- Owen Hildreth
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Manufacturing method of surface-treated zinc-nickel alloy electropl...
- Patent number 11,396,712
- Issue date Jul 26, 2022
- POSCO
- Kang-Min Lee
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Stainless steel for separation plate of polymer electrolyte membran...
- Patent number 11,398,631
- Issue date Jul 26, 2022
- Posco
- Jong Hee Kim
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Laser-scribed grain-oriented silicon steel resistant to stress-reli...
- Patent number 11,355,275
- Issue date Jun 7, 2022
- Baoshan Iron & Steel Co., Ltd.
- Zipeng Zhao
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for extracting metal compound particles, method for analyzin...
- Patent number 11,137,326
- Issue date Oct 5, 2021
- Nippon Steel Corporation
- Kazumi Mizukami
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Apparatus for electrolytic etching and dissolution and method for e...
- Patent number 11,111,595
- Issue date Sep 7, 2021
- Nippon Steel Corporation
- Kazumi Mizukami
- G01 - MEASURING TESTING
Information Patent Grant
Method of producing needle cannula with reduced end portion by elec...
- Patent number 11,065,396
- Issue date Jul 20, 2021
- Novo Nordisk A/S
- Jacqueline Trosborg
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Linear groove formation method and linear groove formation device
- Patent number 11,045,902
- Issue date Jun 29, 2021
- JFE Steel Corporation
- Shigehiro Takajo
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of producing die, die, and interior component of vehicle
- Patent number 10,954,601
- Issue date Mar 23, 2021
- Toyota Boshoku Kabushiki Kaisha
- Yasuhito Higuchi
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Stainless steel sheet for fuel cell separators, and production meth...
- Patent number 10,930,940
- Issue date Feb 23, 2021
- JFE Steel Corporation
- Takayoshi Yano
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Grain-oriented electrical steel sheet
- Patent number 10,906,134
- Issue date Feb 2, 2021
- Nippon Steel Corporation
- Hideyuki Hamamura
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Seawater-resistant stainless clad steel
- Patent number 10,774,396
- Issue date Sep 15, 2020
- JFE Steel Corporation
- Yoshihiro Yazawa
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Stainless steel sheet for fuel cell separators, and production meth...
- Patent number 10,763,517
- Issue date Sep 1, 2020
- JFE Steel Corporation
- Takayoshi Yano
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Multi array electrode having projecting electrode parts arrayed the...
- Patent number 10,756,270
- Issue date Aug 25, 2020
- ANYCASTING CO., LTD.
- Sung Bin Kim
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Stainless steel and synthetic resin composite molded body, and prep...
- Patent number 10,675,797
- Issue date Jun 9, 2020
- DONG GUAN QINDE METAL PRODUCTS CO., LTD.
- Ching-Chuan Hsieh
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method of manufacturing grain-oriented electrical steel sheet
- Patent number 10,629,346
- Issue date Apr 21, 2020
- JFE Steel Corporation
- Kunihiro Senda
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Method for optically inscribing and/or marking round stock
- Patent number 10,557,209
- Issue date Feb 11, 2020
- Weber-Hydraulik GmbH
- Vincenzo Trivigno
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Method for continuous electrolytic etching of grain oriented electr...
- Patent number 10,533,263
- Issue date Jan 14, 2020
- JFE Steel Corporation
- Kenji Matsuda
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Systems and methods for producing anti-wetting structures on metall...
- Patent number 10,458,037
- Issue date Oct 29, 2019
- Georgia Tech Research Corporation
- Won Tae Choi
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Apparatus and method for ionic liquid electroplating
- Patent number 10,138,567
- Issue date Nov 27, 2018
- United Technologies Corporation
- Lei Chen
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Coating device and coating method
- Patent number 9,968,957
- Issue date May 15, 2018
- JFE Steel Corporation
- Hirokazu Kobayashi
- C21 - METALLURGY OF IRON
Information Patent Grant
Sealed laminated structure
- Patent number 9,963,798
- Issue date May 8, 2018
- General Electric Company
- Yuefeng Luo
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for producing a metal coating
- Patent number 9,957,632
- Issue date May 1, 2018
- ONDERZOEKSCENTRUM VOOR AANWENDING VAN STAAL N.V.
- Joost Remi Margueritte De Strycker
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR

Patents Applicationslast 30 patents

Information Patent Application
SYSTEMS AND METHODS FOR REGULATING HYDROGEN TRANSPORT OUT OF STRUCT...
- Publication number 20230212777
- Publication date Jul 6, 2023
- Massachusetts Institute of Technology
- Ju LI
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
SOFT MASK TECHNOLOGY FOR ENGINE SURFACE TEXTURING
- Publication number 20230183882
- Publication date Jun 15, 2023
- THE GEORGE WASHINGTON UNIVERSITY
- Stephen M. HSU
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD FOR SURFACE TREATMENT AND/OR PRODUCTION OF A MEDICAL PRODUCT...
- Publication number 20230160090
- Publication date May 25, 2023
- AESCULAP AG
- Andreas Gassner
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD FOR THE SURFACE TREATMENT AND/OR MANUFACTURE OF A MEDICAL PR...
- Publication number 20230151509
- Publication date May 18, 2023
- AESCULAP AG
- Lukas Waidelich
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Electrolyte Solution
- Publication number 20230065692
- Publication date Mar 2, 2023
- Texture Jet Ltd
- Jonathon MITCHELL-SMITH
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
METHOD OF EXTRACTING PRECIPITATE AND/OR INCLUSION, METHOD OF QUANTI...
- Publication number 20230003624
- Publication date Jan 5, 2023
- JFE STEEL CORPORATION
- Seiya Sugawara
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
Methods For Producing and Using a Textile Machine Tool Part
- Publication number 20220402017
- Publication date Dec 22, 2022
- Groz-Beckert KG
- Jochen Buck
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
STAINLESS STEEL FOR SEPARATION PLATE OF POLYMER ELECTROLYTE MEMBRAN...
- Publication number 20220359888
- Publication date Nov 10, 2022
- POSCO
- Jong Hee KIM
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
METHOD FOR FORMING HOLES, METAL PRODUCT, AND METAL COMPOSITE
- Publication number 20220205127
- Publication date Jun 30, 2022
- SHENZHENSHI YUZHAN PRECISION TECHNOLOGY CO., LTD.
- WEN-CHENG ZHU
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD FOR REMOVING METAL SUPPORTING STRUCTURES ON AN ADDITIVELY MA...
- Publication number 20210395915
- Publication date Dec 23, 2021
- RENA TECHNOLOGIES AUSTRIA GMBH
- Selma HANSAL
- B22 - CASTING POWDER METALLURGY
Information Patent Application
MANUFACTURING METHOD OF SURFACE-TREATED ZINC-NICKEL ALLOY ELECTROPL...
- Publication number 20210285118
- Publication date Sep 16, 2021
- POSCO
- Kang-Min LEE
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
Textile Machine Tool Part and Method for Producing a Textile Tool
- Publication number 20210245231
- Publication date Aug 12, 2021
- Groz-Beckert KG
- Jochen Buck
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD OF PRODUCING NEEDLE CANNULA WITH REDUCED END PORTION BY ELEC...
- Publication number 20210178084
- Publication date Jun 17, 2021
- Novo Nordisk A/S
- Jacqueline Trosborg
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
METAL PRODUCT, METAL COMPOSITE ARTICLE, AND METHODS FOR MANUFACTURI...
- Publication number 20210039350
- Publication date Feb 11, 2021
- SHENZHENSHI YUZHAN PRECISION TECHNOLOGY CO., LTD.
- ZHENG-QUAN WANG
- B32 - LAYERED PRODUCTS
Information Patent Application
STAINLESS STEEL FOR SEPARATION PLATE OF POLYMER ELECTROLYTE MEMBRAN...
- Publication number 20200280075
- Publication date Sep 3, 2020
- POSCO
- Jong Hee KIM
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
PRODUCTION METHOD FOR STAINLESS STEEL SHEET FOR FUEL CELL SEPARATORS
- Publication number 20200248332
- Publication date Aug 6, 2020
- JFE STEEL CORPORATION
- Takayoshi YANO
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
METHOD OF PRODUCING AN ELECTROCATALYST
- Publication number 20200248323
- Publication date Aug 6, 2020
- Sumon Bishwas
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
APPARATUS FOR ELECTROLYTIC ETCHING AND DISSOLUTION AND METHOD FOR E...
- Publication number 20200141843
- Publication date May 7, 2020
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Kazumi MIZUKAMI
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD FOR EXTRACTING METAL COMPOUND PARTICLES, METHOD FOR ANALYZIN...
- Publication number 20200141023
- Publication date May 7, 2020
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Kazumi MIZUKAMI
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
LASER-SCRIBED GRAIN-ORIENTED SILICON STEEL RESISTANT TO STRESS-RELI...
- Publication number 20200058434
- Publication date Feb 20, 2020
- Baoshan Iron & Steel Co., Ltd
- Zipeng ZHAO
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
Chemical Wall-Treatment Method That Reduces the Formation of Coke
- Publication number 20190390362
- Publication date Dec 26, 2019
- TOTAL RAFFINAGE CHIMIE
- Christel Augustin
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
COMPOSITE OF STAINLESS STEEL AND RESIN, METHOD FOR MANUFACTURING TH...
- Publication number 20190358933
- Publication date Nov 28, 2019
- SAMSUNG ELECTRONICS CO., LTD.
- Asung Kim
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD OF PRODUCING NEEDLE CANNULA WITH REDUCED END PORTION BY ELEC...
- Publication number 20190105448
- Publication date Apr 11, 2019
- Novo Nordisk A/S
- Jacqueline Trosborg
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Application
STAINLESS STEEL AND SYNTHETIC RESIN COMPOSITE MOLDED BODY, AND PREP...
- Publication number 20180222097
- Publication date Aug 9, 2018
- CHERRY CHIEF MAF., CORP.
- Ching-Chuan Hsieh
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
LINEAR GROOVE FORMATION METHOD AND LINEAR GROOVE FORMATION DEVICE
- Publication number 20180147663
- Publication date May 31, 2018
- JFE STEEL CORPORATION
- Shigehiro TAKAJO
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD FOR FORMING LINEAR GROOVE ON COLD ROLLED STEEL STRIP AND MET...
- Publication number 20180119242
- Publication date May 3, 2018
- JFE STEEL CORPORATION
- Hirokazu KOBAYASHI
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD FOR FORMING LINEAR GROOVE ON STEEL STRIP AND METHOD FOR MANU...
- Publication number 20180057956
- Publication date Mar 1, 2018
- JFE STEEL CORPORATION
- Hirokazu KOBAYASHI
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
GRAIN-ORIENTED ELECTRICAL STEEL SHEET
- Publication number 20180036838
- Publication date Feb 8, 2018
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Hideyuki HAMAMURA
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
METHOD FOR CONTINUOUS ELECTROLYTIC ETCHING OF GRAIN ORIENTED ELECTR...
- Publication number 20180030612
- Publication date Feb 1, 2018
- JFE STEEL CORPORATION
- Kenji MATSUDA
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Application
MANUFACTURING METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET
- Publication number 20180017868
- Publication date Jan 18, 2018
- JFE STEEL CORPORATION
- Ryuichi SUEHIRO
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR

of iron or steel

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Grain-oriented electrical steel sheet

Stainless steel for fuel cell separator plate and manufacturing met...

System and method for machining workpiece and article machined ther...

Method for forming holes, metal product, and metal composite

Metal article, method for manufacturing the metal article, and meta...

Production method for stainless steel sheet for fuel cell separators

Method of producing an electrocatalyst

Dissolving metal supports in 3D printed metals and ceramics using s...

Manufacturing method of surface-treated zinc-nickel alloy electropl...

Stainless steel for separation plate of polymer electrolyte membran...

Laser-scribed grain-oriented silicon steel resistant to stress-reli...

Method for extracting metal compound particles, method for analyzin...

Apparatus for electrolytic etching and dissolution and method for e...

Method of producing needle cannula with reduced end portion by elec...

Linear groove formation method and linear groove formation device

Method of producing die, die, and interior component of vehicle

Stainless steel sheet for fuel cell separators, and production meth...

Grain-oriented electrical steel sheet

Seawater-resistant stainless clad steel

Stainless steel sheet for fuel cell separators, and production meth...

Multi array electrode having projecting electrode parts arrayed the...

Stainless steel and synthetic resin composite molded body, and prep...

Method of manufacturing grain-oriented electrical steel sheet

Method for optically inscribing and/or marking round stock

Method for continuous electrolytic etching of grain oriented electr...

Systems and methods for producing anti-wetting structures on metall...

Apparatus and method for ionic liquid electroplating

Coating device and coating method

Sealed laminated structure

Method for producing a metal coating

Patents Applicationslast 30 patents

SYSTEMS AND METHODS FOR REGULATING HYDROGEN TRANSPORT OUT OF STRUCT...

SOFT MASK TECHNOLOGY FOR ENGINE SURFACE TEXTURING

METHOD FOR SURFACE TREATMENT AND/OR PRODUCTION OF A MEDICAL PRODUCT...

METHOD FOR THE SURFACE TREATMENT AND/OR MANUFACTURE OF A MEDICAL PR...

Electrolyte Solution

METHOD OF EXTRACTING PRECIPITATE AND/OR INCLUSION, METHOD OF QUANTI...

Methods For Producing and Using a Textile Machine Tool Part

STAINLESS STEEL FOR SEPARATION PLATE OF POLYMER ELECTROLYTE MEMBRAN...

METHOD FOR FORMING HOLES, METAL PRODUCT, AND METAL COMPOSITE

METHOD FOR REMOVING METAL SUPPORTING STRUCTURES ON AN ADDITIVELY MA...

MANUFACTURING METHOD OF SURFACE-TREATED ZINC-NICKEL ALLOY ELECTROPL...

Textile Machine Tool Part and Method for Producing a Textile Tool

METHOD OF PRODUCING NEEDLE CANNULA WITH REDUCED END PORTION BY ELEC...

METAL PRODUCT, METAL COMPOSITE ARTICLE, AND METHODS FOR MANUFACTURI...

STAINLESS STEEL FOR SEPARATION PLATE OF POLYMER ELECTROLYTE MEMBRAN...

PRODUCTION METHOD FOR STAINLESS STEEL SHEET FOR FUEL CELL SEPARATORS

METHOD OF PRODUCING AN ELECTROCATALYST

APPARATUS FOR ELECTROLYTIC ETCHING AND DISSOLUTION AND METHOD FOR E...

METHOD FOR EXTRACTING METAL COMPOUND PARTICLES, METHOD FOR ANALYZIN...

LASER-SCRIBED GRAIN-ORIENTED SILICON STEEL RESISTANT TO STRESS-RELI...

Chemical Wall-Treatment Method That Reduces the Formation of Coke

COMPOSITE OF STAINLESS STEEL AND RESIN, METHOD FOR MANUFACTURING TH...

METHOD OF PRODUCING NEEDLE CANNULA WITH REDUCED END PORTION BY ELEC...

STAINLESS STEEL AND SYNTHETIC RESIN COMPOSITE MOLDED BODY, AND PREP...

LINEAR GROOVE FORMATION METHOD AND LINEAR GROOVE FORMATION DEVICE

METHOD FOR FORMING LINEAR GROOVE ON COLD ROLLED STEEL STRIP AND MET...

METHOD FOR FORMING LINEAR GROOVE ON STEEL STRIP AND METHOD FOR MANU...

GRAIN-ORIENTED ELECTRICAL STEEL SHEET

METHOD FOR CONTINUOUS ELECTROLYTIC ETCHING OF GRAIN ORIENTED ELECTR...

MANUFACTURING METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET