CN114192373A - 一种金属显示屏底座的表面处理工艺 - Google Patents
一种金属显示屏底座的表面处理工艺 Download PDFInfo
- Publication number
- CN114192373A CN114192373A CN202111531516.5A CN202111531516A CN114192373A CN 114192373 A CN114192373 A CN 114192373A CN 202111531516 A CN202111531516 A CN 202111531516A CN 114192373 A CN114192373 A CN 114192373A
- Authority
- CN
- China
- Prior art keywords
- treatment process
- surface treatment
- display screen
- screen base
- workpiece
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000004381 surface treatment Methods 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000011248 coating agent Substances 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 28
- 230000007547 defect Effects 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 238000000227 grinding Methods 0.000 claims abstract description 14
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 238000007590 electrostatic spraying Methods 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 239000004071 soot Substances 0.000 claims abstract description 6
- 238000007790 scraping Methods 0.000 claims abstract description 5
- 239000004094 surface-active agent Substances 0.000 claims description 11
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229940080421 coco glucoside Drugs 0.000 claims description 4
- 229930182478 glucoside Natural products 0.000 claims description 4
- 150000008131 glucosides Chemical class 0.000 claims description 4
- 229940075507 glyceryl monostearate Drugs 0.000 claims description 4
- PYIDGJJWBIBVIA-UYTYNIKBSA-N lauryl glucoside Chemical compound CCCCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O PYIDGJJWBIBVIA-UYTYNIKBSA-N 0.000 claims description 4
- 229940048848 lauryl glucoside Drugs 0.000 claims description 4
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- -1 coco glucoside Chemical compound 0.000 claims description 2
- 238000005507 spraying Methods 0.000 description 8
- 238000011049 filling Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0272—After-treatment with ovens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
本申请涉及金属制品领域,具体公开了一种金属显示屏底座的表面处理工艺,包括以下步骤:清洗‑烘干‑预热‑上粉‑初步热烘‑表面刮除‑一次热烘固化‑表面干法打磨‑吹灰‑静电喷涂‑二次热烘固化,其能够解决工件表面因本身缺陷而导致的粉末涂膜性能差的问题。
Description
技术领域
本申请涉及金属制品领域,更具体地说,它涉及一种金属显示屏底座的表面处理工艺。
背景技术
显示屏底座是一种位于显示屏底部用于支撑显示屏的构件,其一般由金属或金属合金制成。金属合金在制作过程中是通过前期浇铸、后期表面处理的方式制作而成的。
显示屏底座的后期表面处理工艺主要是:通过粉末涂料静电喷涂在构件上实现表面处理。然而,静电喷涂的表面处理效果会受到工件自身缺陷的影响,主要体现在工件自身的划伤、挤压、磕碰、锈蚀、点焊、铆接等形成的凹坑,以及铸件加工后暴露的砂眼、气孔、疏松,机械加工后的细小刀纹等。
虽然有些缺陷可以通过抛光、打磨等手段进行修复,但是有些则只能通过补刮导电腻子才能填平。
然而,因导电腻子的组成与普通腻子基本相似,因此它也具有普通腻子的缺点。缺点主要表现在:附着力较差,粘结强度较低;表面不够细腻,质感差,缺乏韧性;遇潮气后容易粉化;在一定时间后会出现开裂、起皮、脱落等现象。并且目前市场上出售的导电腻子不具备良好的导电性、优良的附着力、较强的填补性、耐180℃高温等特性,因此无法很好的适用在金属表面修复上。
因此,需要提出一种新的方案来解决上述问题。
发明内容
为了解决上述导电腻子无法很好适用在金属表面修复的问题,本申请提供一种金属显示屏底座的表面处理工艺,采用如下的技术方案:
一种金属显示屏底座的表面处理工艺,包括以下步骤:清洗-烘干-预热-上粉-初步热烘-表面刮除-一次热烘固化-表面干法打磨-吹灰-静电喷涂-二次热烘固化;所述上粉步骤为:将粉末涂料涂抹在工件的表面缺陷处。
通过采用上述技术方案,预热后将粉末涂料涂抹在工件上,此时粉末涂料会熔化并在缺陷处流动,并局部填充至缺陷内(如砂眼等),且在后续的初步热烘后,通过小刀对工件表面刮除能够使粉末涂料被挤入缺陷(如砂眼等)深处以排出空气,避免在最终整体喷涂后产生气泡等问题。
采用在预热工件缺陷处局部堆积粉末涂料的方法,其填充性好,对各种细小缺陷均有良好的修复作用,而且在整体喷涂时其导电性良好,吸粉性出色,上粉均匀,不影响最终所得粉末涂膜的性能,解决了导电腻子无法适用金属表面修复的问题。
优选的,所述表面干法打磨步骤中,先对工件表面粗磨,再进行细磨。
通过采用上述技术方案,由于固化的粉末涂层比一般腻子层坚硬难磨,因此打磨时宜先粗磨后细磨才能将表面固化的粉末涂层清除。
优选的,所述初步热烘的温度低于粉末涂料熔点的20~30℃,烘烤10~20min。
通过采用上述技术方案,能够降低因多次烘烤而造成的缺陷内粉末涂料老化的问题出现。
优选的,所述清洗步骤中,清洗液由水以及表面活性剂混合而成。
通过采用上述技术方案,表面活性剂具有使目标溶液表面张力显著下降的功能,有助于工件表面油污、杂质的去除。
优选的,所述表面活性剂包括单硬脂酸甘油酯、椰油基葡糖苷、月桂基葡糖苷、鲸蜡硬脂基葡糖苷中任意一种。
通过采用上述技术方案,单硬脂酸甘油酯、椰油基葡糖苷、月桂基葡糖苷、鲸蜡硬脂基葡糖苷都具有较高的去污去杂质的功能。
优选的,所述清洗过程在超声条件下进行。
通过采用上述技术方案,超声具有空化效应,能够快速且全面的将细小的杂质去除,降低工件表面缺陷。
优选的,所述超声频率为20~40kHz。
通过采用上述技术方案,在此频率下,空化作用效率较高,有助于工件表面杂质的去除。
综上所述,本申请具有以下有益效果:
1、由于本申请采用采用在预热工件缺陷处局部堆积粉末涂料的方法,其填充性好,对各种细小缺陷均有良好的修复作用,而且在整体喷涂时其导电性良好,吸粉性出色,上粉均匀,不影响最终所得粉末涂膜的性能,解决了导电腻子无法适用金属表面修复的问题;另外,通过小刀刮除工件表面的粉末涂料,能够使粉末涂料被挤入缺陷(如砂眼等)深处以排出空气,避免在最终整体喷涂后产生气泡等问题。
2、本申请中通过控制初步热烘-预热温度,能够降低因多次烘烤而造成的缺陷内粉末涂料老化的问题出现。
3、本申请通过添加表面活性剂、超声工艺来清洗工件,有助于工件表面杂质的去除。
具体实施方式
以下结合实施例对本申请作进一步详细说明。
实施例:
实施例1:一种金属显示屏底座的表面处理工艺,包括以下步骤:
清洗-烘干-预热-上粉-初步热烘-表面刮除-一次热烘固化-表面干法打磨-吹灰-静电喷涂-二次热烘固化。
操作注意事项如下:
清洗:清洗液为水,人工将工件放入清水中清洗。
烘干:将工件置于烘房内烘干。
预热:将工件置于烘箱内预热至温度高于粉末涂料熔点的20~30℃。
上粉:使缺陷面水平朝上,迅速用挖耳勺之类的小器具盛舀静电粉末,局部堆积在缺陷处,堆积时力求精准,尽量不要超出缺陷范围太多。将粉末涂料涂抹在工件的表面缺陷处,此时粉末涂料会粘附在工件表面。
初步热烘:初步热烘的温度低于粉末涂料熔点的20~30℃,烘烤15min,使得粉末涂料初步固化。
表面刮除:通过小刀对工件表面刮除能够使粉末涂料被挤入缺陷(如砂眼等)深处以排出空气,避免在最终整体喷涂后产生气泡等问题。
一次热烘固化:将工件置于200±10℃的高温炉内20±1min。
表面干法打磨:先用80目的砂布对工件表面粗磨,再用800目的砂布进行细磨,打磨至工件表面微现砂纸纹即可。
吹灰:通过气枪将打磨部位的粉尘吹干净。
静电喷涂:通过静电喷枪对工件表面进行静电粉末喷涂。
二次热烘固化:将工件置于200±10℃的高温炉内20±1min。
本实施例中的静电粉末购自广东歌丽斯化学有限公司。
实施例2:一种金属显示屏底座的表面处理工艺,与实施例1的区别之处在于:所述清洗步骤中,清洗液由水以及表面活性剂按照10:1混合而成,所述表面活性剂为单硬脂酸甘油酯。
实施例3:一种金属显示屏底座的表面处理工艺,与实施例2的区别之处在于:表面活性剂为椰油基葡糖苷。
实施例4:一种金属显示屏底座的表面处理工艺,与实施例2的区别之处在于:表面活性剂为月桂基葡糖苷。
实施例5:一种金属显示屏底座的表面处理工艺,与实施例2的区别之处在于:表面活性剂为鲸蜡硬脂基葡糖苷。
实施例6:一种金属显示屏底座的表面处理工艺,与实施例1的区别之处在于:所述清洗过程在超声条件下进行,所述超声频率为20kHz。
实施例7:一种金属显示屏底座的表面处理工艺,与实施例6的区别之处在于:超声频率为30kHz。
实施例8:一种金属显示屏底座的表面处理工艺,与实施例6的区别之处在于:超声频率为40kHz。
对比例:
对比例1:一种金属显示屏底座的表面处理工艺,其通过在工件缺陷处补刮导电腻子粉后,再进行静电粉末喷涂,导电腻子粉购自东莞市邦昵涂料有限公司。具体流程为:清洗→干燥→涂导电腻子粉→干燥→打磨→吹灰→喷粉→固化。
性能检测:
对比例1中,腻子与工件的上粉率低、导电性差,制作出来的工件表面部分出现开裂、起泡、脱落的情况。
实施例1~8中,用于填充缺陷处的粉末涂料未出现掉粉,且导电性高,制作出来的工件表面无开裂、起泡、脱落的情况。且测试结果均符合国家标准GB/T 21776-2008。
本具体实施例仅仅是对本申请的解释,其并不是对本申请的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改,但只要在本申请的权利要求范围内都受到专利法的保护。
Claims (7)
1.一种金属显示屏底座的表面处理工艺,其特征在于,包括以下步骤:
清洗-烘干-预热-上粉-初步热烘-表面刮除-一次热烘固化-表面干法打磨-吹灰-静电喷涂-二次热烘固化;
所述预热步骤为:将工件预热至温度高于粉末涂料熔点的20~30℃;
所述上粉步骤为:将粉末涂料涂抹在工件的表面缺陷处。
2.根据权利要求1所述的显示屏底座的表面处理工艺,其特征在于:所述表面干法打磨步骤中,先对工件表面粗磨,再进行细磨。
3.根据权利要求1所述的一种金属显示屏底座的表面处理工艺,其特征在于,所述初步热烘的温度低于粉末涂料熔点的20~30℃,烘烤10~20min。
4.根据权利要求1所述的一种金属显示屏底座的表面处理工艺,其特征在于,所述清洗步骤中,清洗液由水以及表面活性剂混合而成。
5.根据权利要求4所述的一种金属显示屏底座的表面处理工艺,其特征在于,所述表面活性剂包括单硬脂酸甘油酯、椰油基葡糖苷、月桂基葡糖苷、鲸蜡硬脂基葡糖苷中任意一种。
6.根据权利要求1所述的一种金属显示屏底座的表面处理工艺,其特征在于,所述清洗过程在超声条件下进行。
7.权利要求6所述的一种金属显示屏底座的表面处理工艺,其特征在于,所述超声频率为20~40kHz。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111531516.5A CN114192373A (zh) | 2021-12-15 | 2021-12-15 | 一种金属显示屏底座的表面处理工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111531516.5A CN114192373A (zh) | 2021-12-15 | 2021-12-15 | 一种金属显示屏底座的表面处理工艺 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114192373A true CN114192373A (zh) | 2022-03-18 |
Family
ID=80653835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111531516.5A Pending CN114192373A (zh) | 2021-12-15 | 2021-12-15 | 一种金属显示屏底座的表面处理工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114192373A (zh) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1499820A (en) * | 1973-12-29 | 1978-02-01 | Nitto Electric Ind Co | Methods for filling a depression in a surface |
US6238750B1 (en) * | 1999-10-12 | 2001-05-29 | Rohm And Haas Company | Powder coating involving compression of the coating during curing |
US20030113476A1 (en) * | 2001-12-18 | 2003-06-19 | Fredericksen David E. | Method for powder coating plastic articles and articles made thereby |
CN107398413A (zh) * | 2017-07-26 | 2017-11-28 | 苏州盈腾五金制品有限公司 | 金属件的粉末静电喷涂工艺 |
-
2021
- 2021-12-15 CN CN202111531516.5A patent/CN114192373A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1499820A (en) * | 1973-12-29 | 1978-02-01 | Nitto Electric Ind Co | Methods for filling a depression in a surface |
US6238750B1 (en) * | 1999-10-12 | 2001-05-29 | Rohm And Haas Company | Powder coating involving compression of the coating during curing |
US20030113476A1 (en) * | 2001-12-18 | 2003-06-19 | Fredericksen David E. | Method for powder coating plastic articles and articles made thereby |
CN107398413A (zh) * | 2017-07-26 | 2017-11-28 | 苏州盈腾五金制品有限公司 | 金属件的粉末静电喷涂工艺 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101913433B (zh) | 直升机复合材料桨叶表面处理的方法 | |
WO2019037410A1 (zh) | 一种磨损轴承的修复方法 | |
CN102601025B (zh) | 一种压铸铝合金件喷粉工艺方法 | |
KR101359009B1 (ko) | 페인트칠 설비의 구성요소 및 이로부터 페인트를 제거하는장치 | |
CN105618349A (zh) | 一种油漆涂装工艺 | |
CN103691653A (zh) | 一种客车表面涂刮方法 | |
CN108355931A (zh) | 一种压铸件表面处理工艺 | |
CN112676130B (zh) | 桥梁钢结构涂装方法 | |
CN107214062A (zh) | 采用静电粉末喷涂的汽车金属外观件再制造涂覆工艺 | |
CN104353599A (zh) | 一种用玻璃丸处理钢制航空零件防锈漆层的方法 | |
CN106733557A (zh) | 轨道交通车辆的表面处理方法 | |
CN111570236A (zh) | 一种碳钢箱体表面的喷漆方法 | |
CN101966514B (zh) | 一种喷漆方法 | |
CN114192373A (zh) | 一种金属显示屏底座的表面处理工艺 | |
CN107460429B (zh) | 一种等离子体喷涂工艺 | |
CN101491799A (zh) | 一种涂装工艺 | |
CN112221911A (zh) | 一种汽车零部件喷粉工艺 | |
CN103977988B (zh) | 一种高温零部件的清洗方法 | |
JP5877391B1 (ja) | スパッタ付着防止剤 | |
CN114535186A (zh) | 再生pecvd设备或dry etch设备腔体中的构件的方法 | |
KR100749352B1 (ko) | 자동차의 경미한 흠집 부분도장방법 | |
CN107931067A (zh) | 一种汽车用碳纤维制品的编织纹外露喷漆工艺 | |
CN110743935B (zh) | 一种数据还原钣金无腻子修复方法 | |
CN107159531A (zh) | 一种汽车零件的喷漆工艺 | |
CN110653142A (zh) | 一种汽车保险杠喷涂方法 |
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 | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220318 |