CN109609861A - 一种复合钕铁硼磁体的制备方法 - Google Patents

一种复合钕铁硼磁体的制备方法 Download PDF

Info

Publication number
CN109609861A
CN109609861A CN201811546475.5A CN201811546475A CN109609861A CN 109609861 A CN109609861 A CN 109609861A CN 201811546475 A CN201811546475 A CN 201811546475A CN 109609861 A CN109609861 A CN 109609861A
Authority
CN
China
Prior art keywords
parts
iron boron
magnetic body
neodymium iron
boron magnetic
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.)
Pending
Application number
CN201811546475.5A
Other languages
English (en)
Inventor
徐嘉诚
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.)
Zhejiang Zhong Hang Mstar Technology Ltd
Original Assignee
Zhejiang Zhong Hang Mstar Technology 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 Zhejiang Zhong Hang Mstar Technology Ltd filed Critical Zhejiang Zhong Hang Mstar Technology Ltd
Priority to CN201811546475.5A priority Critical patent/CN109609861A/zh
Publication of CN109609861A publication Critical patent/CN109609861A/zh
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

本发明提供的一种复合钕铁硼磁体的制备方法，首先根据配比制备钕铁硼磁体，然后对钕铁硼磁体表面磨砂预处理，接着将预处理后的钕铁硼磁体的表面均匀喷涂一层金属元素、改性剂和增塑剂的匀化浆料。本发明提供的一种复合钕铁硼磁体的制备方法，在钕铁硼磁体添加锡、钛和镓，有利于细化磁体晶粒，增加晶界富稀土相的流动性，以便更好地包覆主相晶粒，并提高磁体的磁性能。另外通过在磁体表面进行预处理，使得匀化浆料能更好的附着在磁体表面，提高涂层在磁体表面的附着力。同时由金属元素、改性剂和增塑剂所组成的匀化浆料，具有流动性高，且内结合力高，有效解决了涂层极易脱落、磁体表面涂层涂覆量不均、生产操作难以控制的问题。

Description

一种复合钕铁硼磁体的制备方法
技术领域
本发明涉及钕铁硼领域，特别涉及一种复合钕铁硼磁体的制备方法。
背景技术
钕铁硼磁体作为第三代稀土永磁材料，具有其他永磁材料无法比拟的优异的磁性能和高的性价比。因此，自发现以来，其得到了广泛的研究和迅猛的发展，已在计算机、通讯电子、汽车、航空等高技术领域得到广泛应用。
但是，随着科学技术的发展，钕铁硼永磁材料的应用范围更加扩大，在某些领域对钕铁硼永磁材料的矫顽力和磁积能等性能提出了更高的要求，因此，按照现有的钕铁硼永磁材料的制造方法生产出的钕铁硼永磁材料的矫顽力、磁能积越来越不能满足实际需要。
发明内容
本发明的目的是克服现有技术的不足，提供一种复合钕铁硼磁体的制备方法。
为了实现上述目的，本发明提供的一种复合钕铁硼磁体的制备方法，包括以下步骤：
步骤一、按重量份将钕10-30份、镨5-15份、铽5-10份、镝5-15份、钬5-15份、钆2-15份、镧2-10份、硼0.8-1.5份、钴5-10份、铜0.2-0.5份、铝0.5-1.5份、锡0.1-0.5份、钛0.05-0.5份、锆0.05-0.5份、铌0.05-0.5份、镓0.05-0.5份以及铁70-80份同时放入感应熔炼炉内熔炼成均匀钢液后浇铸成铸片，然后经过氢碎、压制及烧结后得到钕铁硼磁体；
步骤二、对钕铁硼磁体表面磨砂预处理，然后将预处理后的钕铁硼磁体的表面均匀喷涂一层金属元素、改性剂和增塑剂的匀化浆料，所述金属元素按重量份包括70-80份铝、10-15份铜、3-5份锡、1-5份铋以及1-2份镍；所述改性剂按重量份包括60-70份环氧树脂、20-30份聚酰胺酸以及10-15份聚乙二醇；
步骤三、将喷涂后的钕铁硼磁体放置在隧道式烘道中于40-100℃下保温2-5min：然后在烧结钕铁硼磁体表面形成一层厚度为20-1000μm柔性涂层，再将均匀包覆柔性涂层的钕铁硼磁体进行高温扩渗热处理和低温回火处理即可。
其中高温扩渗热处理温度为850-950℃，时间为0.5-15h，低温回火温度为450-550℃，保温时间2-5h。
所述增塑剂为柠檬酸三丁酯、单烷氧基钛酸酯中的一种或两种混合。
本发明提供的一种复合钕铁硼磁体的制备方法，在钕铁硼磁体添加锡、钛和镓，有利于细化磁体晶粒，增加晶界富稀土相的流动性，以便更好地包覆主相晶粒，从而提高磁体的磁性能。另外通过在磁体表面进行预处理，使得匀化浆料能更好的附着在磁体表面，提高涂层在磁体表面的附着力。同时由金属元素、改性剂和增塑剂所组成的匀化浆料，具有流动性高，且内结合力高，有效解决了涂层极易脱落、磁体表面涂层涂覆量不均、生产操作难以控制的问题。
具体实施方式
实施例1
本实施例提供的一种复合钕铁硼磁体的制备方法，包括以下步骤：
步骤一、按重量份将钕20份、镨10份、铽8份、镝6份、钬15份、钆5份、镧5份、硼0.8份、钴5份、铜0.2份、铝0.5份、锡0.5份、钛0.5份、锆0.5份、铌0.1份、镓0.1份以及铁70份同时放入感应熔炼炉内熔炼成均匀钢液后浇铸成铸片，然后经过氢碎、压制及烧结后得到钕铁硼磁体；
步骤二、对钕铁硼磁体表面磨砂预处理，然后将预处理后的钕铁硼磁体的表面均匀喷涂一层金属元素、改性剂和增塑剂的匀化浆料，所述金属元素按重量份包括70份铝、10份铜、3份锡、1份铋以及1份镍；所述改性剂按重量份包括60份环氧树脂、20份聚酰胺酸以及10份聚乙二醇；
步骤三、将喷涂后的钕铁硼磁体放置在隧道式烘道中于40-100℃下保温2-5min：然后在烧结钕铁硼磁体表面形成一层厚度为20-1000μm柔性涂层，再将均匀包覆柔性涂层的钕铁硼磁体进行高温扩渗热处理和低温回火处理即可。
其中高温扩渗热处理温度为850-950℃，时间为0.5-15h，低温回火温度为450-550℃，保温时间2-5h。
所述增塑剂为柠檬酸三丁酯、单烷氧基钛酸酯中的一种或两种混合。
实施例2
本实施例提供的一种复合钕铁硼磁体的制备方法，其与实施例1的区别在于所述钕铁硼磁体按重量份包括钕15份、镨10份、铽8份、镝10份、钬8份、钆5份、镧5份、硼1份、钴8份、铜0.4份、铝0.8份、锡0.2份、钛0.5份、锆0.1份、铌0.5份、镓0.2份以及铁78份。
实施例3
本实施例提供的一种复合钕铁硼磁体的制备方法，其与实施例1的区别在于所述金属元素按重量份包括80份铝、15份铜、5份锡、5份铋以及2份镍。
实施例4
本实施例提供的一种复合钕铁硼磁体的制备方法，其与实施例1的区别在于；所述改性剂按重量份包括70份环氧树脂、30份聚酰胺酸以及15份聚乙二醇。

Claims (3)

1.一种复合钕铁硼磁体的制备方法，其特征在于，包括以下步骤：
步骤一、按重量份将钕10-30份、镨5-15份、铽5-10份、镝5-15份、钬5-15份、钆2-15份、镧2-10份、硼0.8-1.5份、钴5-10份、铜0.2-0.5份、铝0.5-1.5份、锡0.1-0.5份、钛0.05-0.5份、锆0.05-0.5份、铌0.05-0.5份、镓0.05-0.5份以及铁70-80份同时放入感应熔炼炉内熔炼成均匀钢液后浇铸成铸片，然后经过氢碎、压制及烧结后得到钕铁硼磁体；
步骤二、对钕铁硼磁体表面磨砂预处理，然后将预处理后的钕铁硼磁体的表面均匀喷涂一层金属元素、改性剂和增塑剂的匀化浆料，所述金属元素按重量份包括70-80份铝、10-15份铜、3-5份锡、1-5份铋以及1-2份镍；所述改性剂按重量份包括60-70份环氧树脂、20-30份聚酰胺酸以及10-15份聚乙二醇；
步骤三、将喷涂后的钕铁硼磁体放置在隧道式烘道中于40-100℃下保温2-5min：然后在烧结钕铁硼磁体表面形成一层厚度为20-1000μm柔性涂层，再将均匀包覆柔性涂层的钕铁硼磁体进行高温扩渗热处理和低温回火处理即可。
2.根据权利要求1所述的一种复合钕铁硼磁体的制备方法，其特征在于，其中高温扩渗热处理温度为850-950℃，时间为0.5-15h，低温回火温度为450-550℃，保温时间2-5h。
3.根据权利要求1或2所述的一种复合钕铁硼磁体的制备方法，其特征在于，所述增塑剂为柠檬酸三丁酯、单烷氧基钛酸酯中的一种或两种混合。
CN201811546475.5A 2018-12-18 2018-12-18 一种复合钕铁硼磁体的制备方法 Pending CN109609861A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811546475.5A CN109609861A (zh) 2018-12-18 2018-12-18 一种复合钕铁硼磁体的制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811546475.5A CN109609861A (zh) 2018-12-18 2018-12-18 一种复合钕铁硼磁体的制备方法

Publications (1)

Publication Number Publication Date
CN109609861A true CN109609861A (zh) 2019-04-12

Family

ID=66009500

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811546475.5A Pending CN109609861A (zh) 2018-12-18 2018-12-18 一种复合钕铁硼磁体的制备方法

Country Status (1)

Country Link
CN (1) CN109609861A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113257508A (zh) * 2021-05-13 2021-08-13 中钢天源股份有限公司 一种高综合性能钕铁硼的制作方法
CN113744985A (zh) * 2021-08-02 2021-12-03 安徽省瀚海新材料股份有限公司 一种提升钕铁硼矫顽力的方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103646742A (zh) * 2013-12-23 2014-03-19 湖南航天磁电有限责任公司 一种钕铁硼磁体及其制备方法
CN106623916A (zh) * 2016-12-28 2017-05-10 京磁新材料有限公司 制备钕铁硼磁体的低温烧结方法
CN106782973A (zh) * 2016-12-14 2017-05-31 安徽大地熊新材料股份有限公司 一种高耐蚀烧结钕铁硼磁体的制备方法
CN108269665A (zh) * 2017-12-27 2018-07-10 宁波招宝磁业有限公司 一种钕铁硼磁体及其制备方法
CN108320902A (zh) * 2018-01-19 2018-07-24 浙江鑫盛永磁科技有限公司 一种高综合磁性能烧结钕铁硼磁体及其制备方法
CN108389711A (zh) * 2018-01-05 2018-08-10 宁波招宝磁业有限公司 一种具有高矫顽力的烧结钕铁硼磁体的制备方法
CN108831650A (zh) * 2018-06-21 2018-11-16 宁波可可磁业股份有限公司 一种钕铁硼磁体及其制备方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103646742A (zh) * 2013-12-23 2014-03-19 湖南航天磁电有限责任公司 一种钕铁硼磁体及其制备方法
CN106782973A (zh) * 2016-12-14 2017-05-31 安徽大地熊新材料股份有限公司 一种高耐蚀烧结钕铁硼磁体的制备方法
CN106623916A (zh) * 2016-12-28 2017-05-10 京磁新材料有限公司 制备钕铁硼磁体的低温烧结方法
CN108269665A (zh) * 2017-12-27 2018-07-10 宁波招宝磁业有限公司 一种钕铁硼磁体及其制备方法
CN108389711A (zh) * 2018-01-05 2018-08-10 宁波招宝磁业有限公司 一种具有高矫顽力的烧结钕铁硼磁体的制备方法
CN108320902A (zh) * 2018-01-19 2018-07-24 浙江鑫盛永磁科技有限公司 一种高综合磁性能烧结钕铁硼磁体及其制备方法
CN108831650A (zh) * 2018-06-21 2018-11-16 宁波可可磁业股份有限公司 一种钕铁硼磁体及其制备方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113257508A (zh) * 2021-05-13 2021-08-13 中钢天源股份有限公司 一种高综合性能钕铁硼的制作方法
CN113257508B (zh) * 2021-05-13 2023-09-01 中钢天源股份有限公司 一种钕铁硼的制作方法
CN113744985A (zh) * 2021-08-02 2021-12-03 安徽省瀚海新材料股份有限公司 一种提升钕铁硼矫顽力的方法
CN113744985B (zh) * 2021-08-02 2024-02-23 安徽省瀚海新材料股份有限公司 一种提升钕铁硼矫顽力的方法

Similar Documents

Publication Publication Date Title
CN102347126B (zh) 一种高性能烧结钕铁硼稀土永磁材料及制造方法
CN106128672B (zh) 一种扩散烧结连续化RE‑Fe‑B磁体及其制备方法
CN106409497A (zh) 一种钕铁硼磁体晶界扩散的方法
EP3828905B1 (en) A method for increasing the coercivity of a sintered type ndfeb permanent magnet
CN103489619B (zh) 一种致密细晶钕铁硼烧结磁体的制备方法
CN108063045B (zh) 一种无重稀土钕铁硼永磁材料及其制备方法
CN107610856A (zh) 一种具有陶瓷层钐钴永磁材料的制备方法
CN104851545A (zh) 一种具有晶界扩散层的永磁材料制备方法
CN109609861A (zh) 一种复合钕铁硼磁体的制备方法
US7377985B2 (en) Temper process of sintered Nd-Fe-B permanent magnet
CN109256274A (zh) 低重稀土高矫顽力钕铁硼磁体的制备方法
CN104575899A (zh) 烧结钕铁硼磁体及其制备方法
CN108417336A (zh) 一种高强度钕铁硼永磁材料
CN109627916A (zh) 一种烧结钕铁硼磁体的制备方法
CN109651923A (zh) 一种钕铁硼磁体的表面处理方法
CN104103415B (zh) 一种氢化镝纳米粉末掺杂制备各向异性NdFeB稀土永磁体的方法
CN111151916B (zh) 一种烧结钕铁硼永磁材料钎焊用箔带钎料及制备方法
CN108597709A (zh) 一种耐腐蚀烧结钕铁硼的制备方法
CN104846255A (zh) 一种钇铁基永磁材料的制备方法
CN108335818B (zh) 一种各向异性粘结永磁材料及其制造方法
CN111599587A (zh) 一种大尺寸热变形钕铁硼磁体的制备方法
CN117059391A (zh) 基于钕铁硼磁体的烧结方法
CN109473247A (zh) 一种钕铁硼晶界渗透合金铸片的制备方法
CN103894587B (zh) 一种钕铁硼永磁材料及制备方法与磁场辅助直接铸造装置
JPH0231401A (ja) 希土類磁石合金粉末、その製造方法及びそれを用いた高分子複合型希土類磁石

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190412

RJ01 Rejection of invention patent application after publication