EP3249067A4 - Ferritic stainless steel for exhaust system member having excellent corrosion resistance after heating - Google Patents

Ferritic stainless steel for exhaust system member having excellent corrosion resistance after heating Download PDF

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Publication number
EP3249067A4
EP3249067A4 EP16740065.4A EP16740065A EP3249067A4 EP 3249067 A4 EP3249067 A4 EP 3249067A4 EP 16740065 A EP16740065 A EP 16740065A EP 3249067 A4 EP3249067 A4 EP 3249067A4
Authority
EP
European Patent Office
Prior art keywords
heating
stainless steel
corrosion resistance
exhaust system
excellent corrosion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16740065.4A
Other languages
German (de)
French (fr)
Other versions
EP3249067A1 (en
EP3249067B1 (en
Inventor
Nobuhiko Hiraide
Hiroshi Urashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Stainless Steel Corp
Original Assignee
Nippon Steel and Sumikin Stainless Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel and Sumikin Stainless Steel Corp filed Critical Nippon Steel and Sumikin Stainless Steel Corp
Priority to PL16740065T priority Critical patent/PL3249067T3/en
Publication of EP3249067A1 publication Critical patent/EP3249067A1/en
Publication of EP3249067A4 publication Critical patent/EP3249067A4/en
Application granted granted Critical
Publication of EP3249067B1 publication Critical patent/EP3249067B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Exhaust Silencers (AREA)
EP16740065.4A 2015-01-19 2016-01-15 Ferritic stainless steel for exhaust system member having excellent corrosion resistance after heating Active EP3249067B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16740065T PL3249067T3 (en) 2015-01-19 2016-01-15 Ferritic stainless steel for exhaust system member having excellent corrosion resistance after heating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015007524 2015-01-19
PCT/JP2016/051086 WO2016117458A1 (en) 2015-01-19 2016-01-15 Ferritic stainless steel for exhaust system member having excellent corrosion resistance after heating

Publications (3)

Publication Number Publication Date
EP3249067A1 EP3249067A1 (en) 2017-11-29
EP3249067A4 true EP3249067A4 (en) 2018-07-04
EP3249067B1 EP3249067B1 (en) 2020-11-11

Family

ID=56417005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16740065.4A Active EP3249067B1 (en) 2015-01-19 2016-01-15 Ferritic stainless steel for exhaust system member having excellent corrosion resistance after heating

Country Status (9)

Country Link
US (1) US20180016655A1 (en)
EP (1) EP3249067B1 (en)
JP (1) JP6779790B2 (en)
KR (2) KR20190092621A (en)
CN (1) CN107208213B (en)
ES (1) ES2837114T3 (en)
MX (1) MX2017009376A (en)
PL (1) PL3249067T3 (en)
WO (1) WO2016117458A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102020514B1 (en) * 2017-12-20 2019-09-10 주식회사 포스코 Ferritic stainless steel with improved expanability and method of manufacturing the same
WO2019151125A1 (en) * 2018-01-31 2019-08-08 Ｊｆｅスチール株式会社 Ferritic stainless steel
JP7213650B2 (en) * 2018-09-28 2023-01-27 日鉄ステンレス株式会社 Ferritic stainless steel pipe, pipe end thickened structure and welded structure
KR102168829B1 (en) * 2018-12-10 2020-10-22 주식회사 포스코 LOW-Cr FERRITIC STAINLESS STEEL WITH EXCELLENT FORMABILITY AND HIGH TEMPERATURE PROPERTIES AND MANUFACTURING METHOD THEREOF
WO2020194484A1 (en) * 2019-03-26 2020-10-01 Ｊｆｅスチール株式会社 Ferritic stainless steel sheet and method for producing same

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010031315A (en) * 2008-07-28 2010-02-12 Nippon Steel & Sumikin Stainless Steel Corp Low alloy type ferritic stainless steel for automotive exhaust system member having excellent corrosion resistance after heating
JP2010116619A (en) * 2008-11-14 2010-05-27 Nippon Steel & Sumikin Stainless Steel Corp Mo SAVING TYPE FERRITIC STAINLESS STEEL FOR AUTOMOTIVE EXHAUST SYSTEM MEMBER HAVING EXCELLENT CORROSION RESISTANCE AFTER HEATING
EP2548988A1 (en) * 2010-03-15 2013-01-23 Nippon Steel & Sumikin Stainless Steel Corporation Ferrite-based stainless steel for use in components of automobile exhaust system
EP2557189A1 (en) * 2010-03-26 2013-02-13 Nippon Steel & Sumikin Stainless Steel Corporation Ferrite stainless steel sheet having high thermal resistance and processability, and method for manufacturing the same
EP2617854A1 (en) * 2010-09-16 2013-07-24 Nippon Steel & Sumikin Stainless Steel Corporation Heat-resistant ferrite-type stainless steel plate having excellent oxidation resistance
JP2013204059A (en) * 2012-03-27 2013-10-07 Nippon Steel & Sumikin Stainless Steel Corp Heat-resistant ferritic stainless steel sheet with high weldability
EP2677055A1 (en) * 2011-02-17 2013-12-25 Nippon Steel & Sumikin Stainless Steel Corporation High-purity ferritic stainless steel sheet having excellent oxidation resistance and high-temperature strength, and method for producing same
WO2014033372A1 (en) * 2012-09-03 2014-03-06 Aperam Stainless France Ferritic stainless steel sheet, method for the production thereof, and use of same, especially in exhaust lines
JP2014162964A (en) * 2013-02-26 2014-09-08 Nippon Steel & Sumikin Stainless Steel Corp Low alloy type ferritic stainless steel for automotive exhaust system member excellent in oxidation resistance and corrosion resistance

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3904683B2 (en) 1997-09-12 2007-04-11 新日鐵住金ステンレス株式会社 Ferritic stainless steel with excellent surface properties and method for producing the same
JP4454117B2 (en) 2000-07-24 2010-04-21 新日本製鐵株式会社 Method for producing Cr-containing thin steel sheet
JP4190993B2 (en) 2003-09-17 2008-12-03 日新製鋼株式会社 Ferritic stainless steel sheet with improved crevice corrosion resistance
JP4749881B2 (en) 2005-02-15 2011-08-17 新日鐵住金ステンレス株式会社 Ferritic stainless steel with excellent crevice corrosion resistance
JP4727601B2 (en) 2007-02-06 2011-07-20 新日鐵住金ステンレス株式会社 Ferritic stainless steel with excellent crevice corrosion resistance
JP5274074B2 (en) * 2008-03-28 2013-08-28 新日鐵住金ステンレス株式会社 Heat-resistant ferritic stainless steel sheet with excellent oxidation resistance
JP4624473B2 (en) * 2008-12-09 2011-02-02 新日鐵住金ステンレス株式会社 High purity ferritic stainless steel with excellent weather resistance and method for producing the same
KR101485641B1 (en) * 2012-12-24 2015-01-22 주식회사 포스코 Ferritic stainless steel for automotive exhaust system with excellent corrosion resistance for water condensation and formability and the method of manufacturing the same
CN104870674B (en) * 2012-12-24 2018-01-30 Posco公司 The ferritic stainless steel and its manufacture method for automobile exhaust system with excellent resistance to condensate liquid corrosivity, mouldability and high temperature oxidation resistance

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010031315A (en) * 2008-07-28 2010-02-12 Nippon Steel & Sumikin Stainless Steel Corp Low alloy type ferritic stainless steel for automotive exhaust system member having excellent corrosion resistance after heating
JP2010116619A (en) * 2008-11-14 2010-05-27 Nippon Steel & Sumikin Stainless Steel Corp Mo SAVING TYPE FERRITIC STAINLESS STEEL FOR AUTOMOTIVE EXHAUST SYSTEM MEMBER HAVING EXCELLENT CORROSION RESISTANCE AFTER HEATING
EP2548988A1 (en) * 2010-03-15 2013-01-23 Nippon Steel & Sumikin Stainless Steel Corporation Ferrite-based stainless steel for use in components of automobile exhaust system
EP2557189A1 (en) * 2010-03-26 2013-02-13 Nippon Steel & Sumikin Stainless Steel Corporation Ferrite stainless steel sheet having high thermal resistance and processability, and method for manufacturing the same
EP2617854A1 (en) * 2010-09-16 2013-07-24 Nippon Steel & Sumikin Stainless Steel Corporation Heat-resistant ferrite-type stainless steel plate having excellent oxidation resistance
EP2677055A1 (en) * 2011-02-17 2013-12-25 Nippon Steel & Sumikin Stainless Steel Corporation High-purity ferritic stainless steel sheet having excellent oxidation resistance and high-temperature strength, and method for producing same
JP2013204059A (en) * 2012-03-27 2013-10-07 Nippon Steel & Sumikin Stainless Steel Corp Heat-resistant ferritic stainless steel sheet with high weldability
WO2014033372A1 (en) * 2012-09-03 2014-03-06 Aperam Stainless France Ferritic stainless steel sheet, method for the production thereof, and use of same, especially in exhaust lines
JP2014162964A (en) * 2013-02-26 2014-09-08 Nippon Steel & Sumikin Stainless Steel Corp Low alloy type ferritic stainless steel for automotive exhaust system member excellent in oxidation resistance and corrosion resistance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2016117458A1 *

Also Published As

Publication number Publication date
CN107208213A (en) 2017-09-26
EP3249067A1 (en) 2017-11-29
JPWO2016117458A1 (en) 2017-11-09
JP6779790B2 (en) 2020-11-04
CN107208213B (en) 2019-01-15
KR20190092621A (en) 2019-08-07
US20180016655A1 (en) 2018-01-18
WO2016117458A1 (en) 2016-07-28
MX2017009376A (en) 2017-11-08
KR20170101262A (en) 2017-09-05
ES2837114T3 (en) 2021-06-29
PL3249067T3 (en) 2021-05-31
EP3249067B1 (en) 2020-11-11

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