EP2772554A4 - Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel - Google Patents

Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel

Info

Publication number
EP2772554A4
EP2772554A4 EP12843727.4A EP12843727A EP2772554A4 EP 2772554 A4 EP2772554 A4 EP 2772554A4 EP 12843727 A EP12843727 A EP 12843727A EP 2772554 A4 EP2772554 A4 EP 2772554A4
Authority
EP
European Patent Office
Prior art keywords
aluminum
low
stainless steel
ferritic stainless
smelting high
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
EP12843727.4A
Other languages
German (de)
French (fr)
Other versions
EP2772554A1 (en
EP2772554B1 (en
Inventor
Yingtie Xu
Zhaoping Chen
Shi Li
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.)
Baoshan Iron and Steel Co Ltd
Original Assignee
Baoshan Iron and Steel Co Ltd
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 Baoshan Iron and Steel Co Ltd filed Critical Baoshan Iron and Steel Co Ltd
Publication of EP2772554A1 publication Critical patent/EP2772554A1/en
Publication of EP2772554A4 publication Critical patent/EP2772554A4/en
Application granted granted Critical
Publication of EP2772554B1 publication Critical patent/EP2772554B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP12843727.4A 2011-10-25 2012-01-06 Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel Active EP2772554B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201110327941 CN102329920B (en) 2011-10-25 2011-10-25 Method for smelting high-aluminum low-silicon ultra pure ferritic stainless steel
PCT/CN2012/070096 WO2013060101A1 (en) 2011-10-25 2012-01-06 Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel

Publications (3)

Publication Number Publication Date
EP2772554A1 EP2772554A1 (en) 2014-09-03
EP2772554A4 true EP2772554A4 (en) 2015-11-11
EP2772554B1 EP2772554B1 (en) 2017-03-01

Family

ID=45481880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12843727.4A Active EP2772554B1 (en) 2011-10-25 2012-01-06 Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel

Country Status (6)

Country Link
EP (1) EP2772554B1 (en)
JP (1) JP5833767B2 (en)
KR (1) KR101787179B1 (en)
CN (1) CN102329920B (en)
IN (1) IN2014CN01547A (en)
WO (1) WO2013060101A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103225034B (en) * 2013-04-25 2015-05-06 山西太钢不锈钢股份有限公司 Method for improving yielding rate of ultra pure ferrite stainless steel titanium
CN103397141B (en) * 2013-07-30 2014-12-24 山西太钢不锈钢股份有限公司 Smelting method of high-aluminum stainless steel
CN103388052A (en) * 2013-08-08 2013-11-13 山西太钢不锈钢股份有限公司 Production method of deoxidizing low-silicon steel by adding silicon-containing alloy
CN104946855B (en) * 2015-07-15 2017-03-08 武汉钢铁(集团)公司 A kind of vacuum processing method of high alumina ultra-low-carbon steel
CN105648148B (en) * 2016-01-06 2017-08-15 山西太钢不锈钢股份有限公司 A kind of super-purity ferrite stainless steel deoxidation and the method for Control and Inclusion Removal
CN109423536B (en) * 2017-08-25 2021-04-13 宝山钢铁股份有限公司 Smelting method of ultra-low carbon 13Cr stainless steel
CN107876211B (en) * 2017-11-28 2023-08-29 嘉峪关天源新材料有限责任公司 Composite magnetic focusing medium rod with high magnetic field strength and preparation method thereof
CN108167301A (en) * 2018-02-26 2018-06-15 嘉兴市劼力机械科技有限公司 A kind of fastener and its production technology
CN112063801B (en) * 2020-09-17 2022-08-23 浦项(张家港)不锈钢股份有限公司 Stainless steel and preparation method thereof
CN112475255B (en) * 2020-11-18 2022-04-01 山西太钢不锈钢股份有限公司 Continuous casting production method of high-aluminum ferrite stainless steel
CN113151637B (en) * 2021-03-31 2022-10-14 北京科技大学 Method for controlling pit defect of chromium-containing steel surface polishing inclusion
CN113560509B (en) * 2021-07-27 2023-02-24 上海电气上重铸锻有限公司 Method for manufacturing low-silicon boron-controlled steel large steel ingot
CN113737081B (en) * 2021-08-31 2022-04-01 中国科学院上海应用物理研究所 Stainless steel smelting method, stainless steel modification method and stainless steel
CN115287403A (en) * 2022-08-15 2022-11-04 广东韶钢松山股份有限公司 Low-carbon low-silicon cold heading steel deoxidation method
CN115369207A (en) * 2022-09-06 2022-11-22 重庆钢铁股份有限公司 Method for controlling nitrogen content of non-vacuum smelting plate blank
CN115522124B (en) * 2022-09-20 2023-03-14 中天钢铁集团有限公司 Method for improving continuous casting castability and sulfide form of medium-carbon S-containing Al-containing steel

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5763620A (en) * 1980-09-01 1982-04-17 Sumitomo Metal Ind Ltd Denitriding and refining method for high chromium steel
JPH06128620A (en) * 1992-10-19 1994-05-10 Nippon Steel Corp Method for adding ca
JPH09287016A (en) * 1996-04-19 1997-11-04 Nippon Steel Corp Method for melting stainless steel
JPH101710A (en) * 1996-06-13 1998-01-06 Daido Steel Co Ltd Manufacture of chromium-aluminum-(low n)-silicon steel
JPH1180826A (en) * 1997-09-01 1999-03-26 Nippon Steel Corp Low silicon steel and production thereof
JPH11158537A (en) * 1997-12-02 1999-06-15 Sumitomo Metal Ind Ltd Production of extra-low carbon steel excellent in cleanliness
JP3855553B2 (en) * 1999-08-30 2006-12-13 Ｊｆｅスチール株式会社 Al concentration adjustment method for high Si content molten steel
JP3624804B2 (en) 2000-07-14 2005-03-02 住友金属工業株式会社 Method for producing ridging resistant ferritic stainless steel
JP2008274329A (en) * 2007-04-26 2008-11-13 Jfe Steel Kk Low-carbon ferritic stainless steel with excellent ridging characteristic, and its manufacturing method
CN100557038C (en) * 2007-05-30 2009-11-04 山西太钢不锈钢股份有限公司 The smelting process of a kind of super-purity ferrite stainless steel decarburization, denitrogenation
KR100922061B1 (en) * 2007-12-12 2009-10-16 주식회사 포스코 Method of manufacturing ultra low carbon ferritic stainless steel
CN101768656B (en) * 2008-12-31 2011-08-24 宝山钢铁股份有限公司 Method for refining ultra-low carbon ferritic stainless steel under vacuum
CN102199684B (en) * 2010-03-25 2013-03-13 宝山钢铁股份有限公司 Production method of ultralow-oxygen titanium-containing ferrite stainless steel
CN102199688B (en) * 2010-03-25 2013-02-06 宝山钢铁股份有限公司 Method for efficiently refining ultra-pure ferritic stainless steel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO2013060101A1 *

Also Published As

Publication number Publication date
IN2014CN01547A (en) 2015-05-08
CN102329920B (en) 2013-04-24
JP5833767B2 (en) 2015-12-16
CN102329920A (en) 2012-01-25
JP2015501382A (en) 2015-01-15
EP2772554A1 (en) 2014-09-03
EP2772554B1 (en) 2017-03-01
KR101787179B1 (en) 2017-11-15
WO2013060101A1 (en) 2013-05-02
KR20140092800A (en) 2014-07-24

Similar Documents

Publication Publication Date Title
EP2772554A4 (en) Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel
HK1196023A1 (en) Austenitic stainless steel
EP2615188A4 (en) Austenitic stainless steel
EP2728031A4 (en) Austenitic stainless steel pipe
HK1199761A1 (en) Method for detecting nucleosomes
EP2767605A4 (en) Ferritic stainless steel
EP2692452A4 (en) Stainless steel sheet and method for manufacturing same
ZA201402051B (en) Duplex stainless steel
EP2902523A4 (en) Ferritic stainless steel
EP2787097A4 (en) Ferritic stainless steel
EP2687612A4 (en) Steel pipe quenching method
SI2900840T1 (en) Austenitic stainless steel
EP2787096A4 (en) Ferritic stainless steel
SI2591134T1 (en) Austenitic-ferritic stainless steel with improved machinability
EP2773785A4 (en) Duplex stainless steel
EP2767603A4 (en) Ferritic stainless steel
EP2677056A4 (en) Duplex stainless steel
EP2799577A4 (en) Ferritic stainless steel
ZA201409515B (en) Ferritic stainless steel
PL2772559T3 (en) Steel sheet
EP2824208A4 (en) Ferritic stainless steel sheet
EP2826878A4 (en) Ferritic stainless steel
EP2915893A4 (en) Austenitic stainless steel
EP2857538A4 (en) Ferritic stainless steel
EP2692887A4 (en) Cast austenitic stainless steel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140411

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RA4 Supplementary search report drawn up and despatched (corrected)

Effective date: 20151012

RIC1 Information provided on ipc code assigned before grant

Ipc: C21C 7/06 20060101ALI20151006BHEP

Ipc: C21C 7/10 20060101AFI20151006BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160810

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 871422

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170315

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602012029391

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20170301

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 871422

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170602

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170601

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170701

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170703

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602012029391

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

26N No opposition filed

Effective date: 20171204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20180106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180106

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180928

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180106

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20120106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170301

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170301

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20231228

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20231228

Year of fee payment: 13