KR20210116478A - 키메라 수용체 폴리펩티드 및 이의 용도 - Google Patents

키메라 수용체 폴리펩티드 및 이의 용도 Download PDF

Info

Publication number
KR20210116478A
KR20210116478A KR1020217022271A KR20217022271A KR20210116478A KR 20210116478 A KR20210116478 A KR 20210116478A KR 1020217022271 A KR1020217022271 A KR 1020217022271A KR 20217022271 A KR20217022271 A KR 20217022271A KR 20210116478 A KR20210116478 A KR 20210116478A
Authority
KR
South Korea
Prior art keywords
domain
tcr
extracellular
binding domain
linker
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.)
Withdrawn
Application number
KR1020217022271A
Other languages
English (en)
Korean (ko)
Inventor
밍 젱
후이후이 장
Original Assignee
난징 레전드 바이오테크 씨오., 엘티디.
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 난징 레전드 바이오테크 씨오., 엘티디. filed Critical 난징 레전드 바이오테크 씨오., 엘티디.
Publication of KR20210116478A publication Critical patent/KR20210116478A/ko
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
    • A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
    • A61K35/14—Blood; Artificial blood
    • A61K35/17—Lymphocytes; B-cells; T-cells; Natural killer cells; Interferon-activated or cytokine-activated lymphocytes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K40/00—Cellular immunotherapy
    • A61K40/10—Cellular immunotherapy characterised by the cell type used
    • A61K40/11—T-cells, e.g. tumour infiltrating lymphocytes [TIL] or regulatory T [Treg] cells; Lymphokine-activated killer [LAK] cells
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K40/00—Cellular immunotherapy
    • A61K40/30—Cellular immunotherapy characterised by the recombinant expression of specific molecules in the cells of the immune system
    • A61K40/32—T-cell receptors [TCR]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K40/00—Cellular immunotherapy
    • A61K40/40—Cellular immunotherapy characterised by antigens that are targeted or presented by cells of the immune system
    • A61K40/41—Vertebrate antigens
    • A61K40/42—Cancer antigens
    • A61K40/4202—Receptors, cell surface antigens or cell surface determinants
    • A61K40/4214—Receptors for cytokines
    • A61K40/4215—Receptors for tumor necrosis factors [TNF], e.g. lymphotoxin receptor [LTR], CD30
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
    • C07K14/70503—Immunoglobulin superfamily
    • C07K14/7051—T-cell receptor (TcR)-CD3 complex
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2803—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
    • C07K16/2809—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against the T-cell receptor (TcR)-CD3 complex
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2878—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the NGF-receptor/TNF-receptor superfamily, e.g. CD27, CD30, CD40, CD95
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • C12N15/62—DNA sequences coding for fusion proteins
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
    • C12N15/85—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells
    • C12N15/86—Viral vectors
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
    • C12N5/06—Animal cells or tissues; Human cells or tissues
    • C12N5/0602—Vertebrate cells
    • C12N5/0634—Cells from the blood or the immune system
    • C12N5/0636—T lymphocytes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/51—Medicinal preparations containing antigens or antibodies comprising whole cells, viruses or DNA/RNA
    • A61K2039/515—Animal cells
    • A61K2039/5156—Animal cells expressing foreign proteins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/51—Medicinal preparations containing antigens or antibodies comprising whole cells, viruses or DNA/RNA
    • A61K2039/515—Animal cells
    • A61K2039/5158—Antigen-pulsed cells, e.g. T-cells
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/569—Single domain, e.g. dAb, sdAb, VHH, VNAR or nanobody®
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
    • C07K2317/622—Single chain antibody (scFv)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/76—Antagonist effect on antigen, e.g. neutralization or inhibition of binding
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2319/00—Fusion polypeptide
    • C07K2319/01—Fusion polypeptide containing a localisation/targetting motif
    • C07K2319/02—Fusion polypeptide containing a localisation/targetting motif containing a signal sequence
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2319/00—Fusion polypeptide
    • C07K2319/01—Fusion polypeptide containing a localisation/targetting motif
    • C07K2319/03—Fusion polypeptide containing a localisation/targetting motif containing a transmembrane segment
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2319/00—Fusion polypeptide
    • C07K2319/33—Fusion polypeptide fusions for targeting to specific cell types, e.g. tissue specific targeting, targeting of a bacterial subspecies
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2510/00—Genetically modified cells
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2740/00—Reverse transcribing RNA viruses
    • C12N2740/00011—Details
    • C12N2740/10011—Retroviridae
    • C12N2740/16011—Human Immunodeficiency Virus, HIV
    • C12N2740/16041—Use of virus, viral particle or viral elements as a vector
    • C12N2740/16043—Use of virus, viral particle or viral elements as a vector viral genome or elements thereof as genetic vector

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Zoology (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Medicinal Chemistry (AREA)
  • Biophysics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Biotechnology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Wood Science & Technology (AREA)
  • Epidemiology (AREA)
  • Cell Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Toxicology (AREA)
  • Hematology (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Plant Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Virology (AREA)
  • Peptides Or Proteins (AREA)
  • Developmental Biology & Embryology (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
KR1020217022271A 2019-01-14 2020-01-14 키메라 수용체 폴리펩티드 및 이의 용도 Withdrawn KR20210116478A (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN2019071609 2019-01-14
CNPCT/CN2019/071609 2019-01-14
PCT/CN2020/071947 WO2020147708A1 (en) 2019-01-14 2020-01-14 Chimeric receptor polypeptides and uses thereof

Publications (1)

Publication Number Publication Date
KR20210116478A true KR20210116478A (ko) 2021-09-27

Family

ID=71614406

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020217022271A Withdrawn KR20210116478A (ko) 2019-01-14 2020-01-14 키메라 수용체 폴리펩티드 및 이의 용도

Country Status (9)

Country Link
US (1) US20230192805A1 (enExample)
EP (1) EP3911370A4 (enExample)
JP (1) JP2022516496A (enExample)
KR (1) KR20210116478A (enExample)
CN (1) CN113164626A (enExample)
AU (1) AU2020208110A1 (enExample)
CA (1) CA3126422A1 (enExample)
SG (1) SG11202106257WA (enExample)
WO (1) WO2020147708A1 (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020123938A1 (en) 2018-12-14 2020-06-18 Bluebird Bio, Inc. Dimerizing agent regulated immunoreceptor complexes
WO2022228579A1 (en) * 2021-04-30 2022-11-03 Nanjing Legend Biotech Co., Ltd. Chimeric antigen receptors targeting gpc3 and methods of use thereof
WO2023274382A1 (zh) * 2021-06-30 2023-01-05 华夏英泰(北京)生物技术有限公司 一种多靶点合成t细胞受体抗原/抗体受体及其应用
EP4370541A1 (en) * 2021-07-14 2024-05-22 2seventy bio, Inc. Engineered t cell receptors fused to binding domains from antibodies
WO2023164698A2 (en) * 2022-02-27 2023-08-31 Health Research, Inc. FOLATE RECEPTOR ALPHA -TARGETING BI-SPECIFIC T CELL ENGAGERS (BiTEs) AND USES THEREOF
CN114560949B (zh) * 2022-03-07 2023-09-26 中国人民解放军空军军医大学 一种具有增强car-t细胞抗肿瘤能力的嵌合抗原受体、d-car-t细胞及其应用
CN114573712B (zh) * 2022-03-07 2023-05-12 中国人民解放军空军军医大学 一种嵌合抗原受体、car-t细胞及其应用
CN114560948B (zh) * 2022-03-07 2023-05-23 中国人民解放军空军军医大学 一种嵌合抗原受体、car-t细胞及其应用
US20260166144A1 (en) * 2022-04-07 2026-06-18 Carsgen Life Sciences Co., Ltd. Chimeric polypeptide and use thereof
AR130387A1 (es) * 2022-09-08 2024-12-04 Hoffmann La Roche Receptores de linfocitos t recombinantes
WO2024100136A1 (en) * 2022-11-08 2024-05-16 Gadeta B.V. Novel method for obtaining gamma t-cell (or delta t-cell) receptor chains (or gamma delta t-cell receptors) or fragments thereof that mediate an anti-tumour or an anti-infective response
WO2024140710A1 (zh) * 2022-12-26 2024-07-04 华夏英泰(北京)生物技术有限公司 一种特异性结合lilrb4的合成t细胞受体抗原受体及其应用
WO2024140981A1 (zh) * 2022-12-30 2024-07-04 上药生物治疗(香港)有限公司 细胞原位分泌抗体及其用途
CN117074674B (zh) * 2023-03-23 2024-01-23 武汉勖瑞生物科技有限责任公司 检测N-乙酰-β-D氨基葡萄糖苷酶的胶体金试纸及其制备方法
US20260234216A1 (en) * 2023-03-30 2026-08-13 Yale University Universal antibody receptors, guar-t cells and therapeutic use thereof

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0908613D0 (en) * 2009-05-20 2009-06-24 Immunocore Ltd T Cell Reseptors
CN105555804B (zh) * 2013-08-07 2020-12-25 阿菲姆德股份有限公司 对EGFRvIII有特异性的抗体结合位点
US9212225B1 (en) * 2014-07-01 2015-12-15 Amphivena Therapeutics, Inc. Bispecific CD33 and CD3 binding proteins
US20170335009A1 (en) * 2014-10-31 2017-11-23 H. Lee Moffitt Cancer Center And Research Institute, Inc. Tetravalent tlr9 bispecific antibody
US10383929B2 (en) * 2014-12-12 2019-08-20 Bluebird Bio, Inc. BCMA chimeric antigen receptors
EP3770168A1 (en) * 2015-05-18 2021-01-27 TCR2 Therapeutics Inc. Compositions and methods for tcr reprogramming using fusion proteins
GB201522592D0 (en) * 2015-12-22 2016-02-03 Immunocore Ltd T cell receptors
GB201604953D0 (en) * 2016-03-23 2016-05-04 Immunocore Ltd T cell receptors
CN105777911B (zh) * 2016-04-12 2019-07-02 上海优卡迪生物医药科技有限公司 抗bcma嵌合抗原受体、编码基因、重组表达载体及其构建方法和应用
US20190375815A1 (en) * 2017-01-31 2019-12-12 Novartis Ag Treatment of cancer using chimeric t cell receptor proteins having multiple specificities
WO2018200582A1 (en) * 2017-04-26 2018-11-01 Eureka Therapeutics, Inc. Chimeric antibody/t-cell receptor constructs and uses thereof

Also Published As

Publication number Publication date
CA3126422A1 (en) 2020-07-23
CN113164626A (zh) 2021-07-23
US20230192805A1 (en) 2023-06-22
EP3911370A4 (en) 2022-10-26
AU2020208110A1 (en) 2021-07-15
JP2022516496A (ja) 2022-02-28
WO2020147708A1 (en) 2020-07-23
EP3911370A1 (en) 2021-11-24
SG11202106257WA (en) 2021-07-29

Similar Documents

Publication Publication Date Title
WO2020147708A1 (en) Chimeric receptor polypeptides and uses thereof
US20230295296A1 (en) Methods of making chimeric antigen receptor-expressing cells
JP7217970B2 (ja) 融合タンパク質を用いてt細胞受容体をリプログラミングするための組成物及び方法
US20190161542A1 (en) Treatment of cancer using a chimeric antigen receptor in combination with an inhibitor of a pro-m2 macrophage molecule
CA3057306A1 (en) Biomarkers and car t cell therapies with enhanced efficacy
JP2020513754A (ja) がん治療用に操作されたt細胞
CA2999070A1 (en) Car t cell therapies with enhanced efficacy
CA2961636A1 (en) Targeting cytotoxic cells with chimeric receptors for adoptive immunotherapy
JP2020517261A (ja) 遺伝子療法
JP7796044B2 (ja) Cd70特異的融合タンパク質を使用したtcrリプログラミングのための組成物及び方法
JP7524465B2 (ja) 免疫細胞機能の改善
JP2024510162A (ja) 免疫細胞機能の改善
HK40068768A (en) Methods of making chimeric antigen receptor-expressing cells
HK1238264B (en) Methods of making chimeric antigen receptor-expressing cells

Legal Events

Date Code Title Description
PA0105 International application

Patent event date: 20210715

Patent event code: PA01051R01D

Comment text: International Patent Application

PG1501 Laying open of application
PC1202 Submission of document of withdrawal before decision of registration

Comment text: [Withdrawal of Procedure relating to Patent, etc.] Withdrawal (Abandonment)

Patent event code: PC12021R01D

Patent event date: 20250513

WITB Written withdrawal of application