JP2022507953A - 半導体製造に有用な樹脂を作製するための方法 - Google Patents
半導体製造に有用な樹脂を作製するための方法 Download PDFInfo
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- 239000011347 resin Substances 0.000 title claims abstract description 64
- 229920005989 resin Polymers 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000004065 semiconductor Substances 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 18
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 18
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 9
- 230000002378 acidificating effect Effects 0.000 claims abstract description 8
- 239000011260 aqueous acid Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 21
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 10
- 239000003431 cross linking reagent Substances 0.000 claims description 10
- 239000000178 monomer Substances 0.000 claims description 8
- MBBZMMPHUWSWHV-BDVNFPICSA-N N-methylglucamine Chemical compound CNC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO MBBZMMPHUWSWHV-BDVNFPICSA-N 0.000 claims description 5
- 125000000524 functional group Chemical group 0.000 claims description 5
- 229920005862 polyol Polymers 0.000 claims description 5
- -1 amino polyol Chemical class 0.000 claims description 4
- 150000003077 polyols Chemical group 0.000 abstract description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000002585 base Substances 0.000 description 11
- 229910052796 boron Inorganic materials 0.000 description 11
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 7
- 125000004432 carbon atom Chemical group C* 0.000 description 7
- 230000008961 swelling Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 238000005576 amination reaction Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000007265 chloromethylation reaction Methods 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000010306 acid treatment Methods 0.000 description 3
- 150000001491 aromatic compounds Chemical class 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 229920001429 chelating resin Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002242 deionisation method Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 2
- 229910021642 ultra pure water Inorganic materials 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- NWRZGFYWENINNX-UHFFFAOYSA-N 1,1,2-tris(ethenyl)cyclohexane Chemical compound C=CC1CCCCC1(C=C)C=C NWRZGFYWENINNX-UHFFFAOYSA-N 0.000 description 1
- WVAFEFUPWRPQSY-UHFFFAOYSA-N 1,2,3-tris(ethenyl)benzene Chemical compound C=CC1=CC=CC(C=C)=C1C=C WVAFEFUPWRPQSY-UHFFFAOYSA-N 0.000 description 1
- IGGDKDTUCAWDAN-UHFFFAOYSA-N 1-vinylnaphthalene Chemical compound C1=CC=C2C(C=C)=CC=CC2=C1 IGGDKDTUCAWDAN-UHFFFAOYSA-N 0.000 description 1
- SBYMUDUGTIKLCR-UHFFFAOYSA-N 2-chloroethenylbenzene Chemical compound ClC=CC1=CC=CC=C1 SBYMUDUGTIKLCR-UHFFFAOYSA-N 0.000 description 1
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001412 amines Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- MPMBRWOOISTHJV-UHFFFAOYSA-N but-1-enylbenzene Chemical compound CCC=CC1=CC=CC=C1 MPMBRWOOISTHJV-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 125000004218 chloromethyl group Chemical group [H]C([H])(Cl)* 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000003361 porogen Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 239000012508 resin bead Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J45/00—Ion-exchange in which a complex or a chelate is formed; Use of material as complex or chelate forming ion-exchangers; Treatment of material for improving the complex or chelate forming ion-exchange properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/04—Processes using organic exchangers
- B01J41/07—Processes using organic exchangers in the weakly basic form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/08—Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/12—Macromolecular compounds
- B01J41/13—Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/02—Column or bed processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/50—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/50—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents
- B01J49/57—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents for anionic exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/60—Cleaning or rinsing ion-exchange beds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/108—Boron compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/346—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from semiconductor processing, e.g. waste water from polishing of wafers
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
(a)酸性形態の塩基性イオン交換樹脂を提供する工程(前述の樹脂は、アミノポリオール基を含み、塩基性形態から酸性形態への変換時に体積%が15~30%膨潤する)と、
(b)樹脂を水又は酸水溶液で洗浄する工程と、
を含む。
1.5ガロンの容器に、7リットルのDowex(商標)BSR-1キレート樹脂を加えた。樹脂は、22%の膨潤(OHからCl)を有すると測定された。
2.7リットルの4重量%の塩酸を加えた。
3.30分間浸し、サイフォンで液体を取り除いた。
4.工程2と3を2回繰り返した(合計21リットルの塩酸)
5.7リットルのDI水を加えた。
6.20分間浸し、サイフォンで液体を取り除いた。
7.工程2と3を2回繰り返した(合計21リットルのDI水)。
8.工程1~7を繰り返し、合計14リットルの塩酸処理したBSR-1樹脂を作製した。
9.20リットルのガラスカラム(直径5.5)に、14リットルの塩酸処理したBSR-1樹脂を充填した。
10.80℃のDI水を6.6BV/時間(1540ml/分)で13時間、下向の流れでカラムに通した。
11.周囲温度のDI水を6.6BV/時間(1540ml/分)で13時間、下向の流れでカラムに通した。
12.21リットルの4%水酸化ナトリウムを350ml/分で60分間カラムに通した。
13.流れを止め、樹脂を4%水酸化ナトリウムに30分間浸した。
14.工程12と13を繰り返した。
15.周囲温度のDI水を6.6BV/時間(1540ml/分)で6.5時間、下向の流れでカラムに通した。
16.サイフォンで流し出し(packout)脱水した。
1.ビーカーに500mlのAmberlite(商標)PWA10を加えた。樹脂は、7%の膨潤(OHからHCl)を有すると測定された。
2.500mlのMilliQ水を加え、一晩浸した。
3.サイフォンで液体を取り除いた。
4.500mlの1N塩酸を加えた。30秒間接触させた。
5.サイフォンで液体を取り除いた。
6.工程3~4を繰り返した。
7.樹脂をガラスカラムに移した。
8.1N塩酸を、周囲温度にて4BV/時間(33ml/分)で1.4時間樹脂に通した。
9.MilliQ水を、周囲温度にて4BV/時間(33ml/分)で1.0時間樹脂に通した。
10.1N水酸化ナトリウムを、周囲温度にて4BV/時間(33ml/分)で1.3時間樹脂に通した。
11.MilliQ水を、周囲温度にて4BV/時間(33ml/分)で1.0時間樹脂に通した。
12.工程10~11を繰り返した。
1.ビーカーに500mlのDowex(商標)BSR-1キレート樹脂を加えた。樹脂は22%の膨潤(OHからCl)を有すると測定された。
2.500mlのMilliQ水を加え、一晩浸した。
3.サイフォンで液体を取り除いた。
4.500mlの1N塩酸を加えた。30秒間接触させた。
5.サイフォンで液体を取り除いた。
6.工程3~4を繰り返した。
7.樹脂をガラスカラムに移した。
8.1N塩酸を、周囲温度にて4BV/時間(33ml/分)で1.4時間樹脂に通した。
9.MilliQ水を、周囲温度にて4BV/時間(33ml/分)で1.0時間樹脂に通した。
10.1N水酸化ナトリウムを、周囲温度にて4BV/時間(33ml/分)で1.3時間樹脂に通した。
11.MilliQ水を、周囲温度にて4BV/時間(33ml/分)で1.0時間樹脂に通した。
12.工程10~11を繰り返した。
1.直径2インチのジャケット付きガラスカラムに、150mlのAmberlite(商標)PWA10を充填した。
2.90℃のDI水を、6.6BV/時間(16ml/分)で6.5時間、下向の流れでカラムに通した。
3.周囲温度のDI水を、13BV/hr(33ml/分)で1.9時間、下向の流れでカラムに通した。
4.サイフォンで流し出し脱水した。
Claims (11)
- (a)酸性形態の塩基性イオン交換樹脂を提供する工程であって、前記樹脂は、アミノポリオール基を含み、塩基性形態から酸性形態への変換時に体積%が15~30%膨潤する、提供する工程と、
(b)前記樹脂を水又は酸水溶液で洗浄する工程と、
を含む、イオン交換樹脂を作製する方法。 - 前記樹脂は、2.0~3.2当量/kgの活性部位を含む、請求項1に記載の方法。
- 前記樹脂は、マクロ網状構造を有する、請求項2に記載の方法。
- 前記樹脂は、2.5~3当量/kgのアミノポリオール基を含む、請求項3に記載の方法。
- 前記樹脂は、2~4重量%の架橋剤の重合単位を含む、請求項4に記載の方法。
- (a)酸性形態の塩基性イオン交換樹脂を提供する工程であって、前記樹脂は、2~4重量%の架橋剤の重合単位と、マクロ網状構造と、2.0~3.2当量/kgの活性部位とを含み、前記活性部位は、アミノポリオール官能基を含む、提供する工程と、
(b)前記樹脂を水又は酸水溶液で洗浄する工程と、
を含む、イオン交換樹脂を作製する方法。 - 前記樹脂は、2.5~3当量/kgのアミノポリオール基を含む、請求項6に記載の方法。
- 前記樹脂は、96~98重量%のスチレン系モノマーを含む、請求項7に記載の方法。
- 2~4重量%のジビニルベンゼンの重合単位と、マクロ網状構造と、2.0~3.2当量/kgの活性部位であって、アミノポリオール官能基を含む活性部位とを含むイオン交換樹脂。
- 96~98重量%のスチレン系モノマーを含む、請求項9に記載のイオン交換樹脂。
- 前記アミノポリオールは、N-メチルグルカミンである、請求項10に記載のイオン交換樹脂。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US201862771623P | 2018-11-27 | 2018-11-27 | |
US62/771,623 | 2018-11-27 | ||
PCT/US2019/062112 WO2020112428A1 (en) | 2018-11-27 | 2019-11-19 | Method for producing resin useful in semiconductor manufacturing |
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JP2022507953A true JP2022507953A (ja) | 2022-01-18 |
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US (1) | US20220001372A1 (ja) |
EP (1) | EP3887040A1 (ja) |
JP (1) | JP2022507953A (ja) |
KR (1) | KR20210096159A (ja) |
CN (1) | CN113272058A (ja) |
WO (1) | WO2020112428A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3567369A (en) * | 1968-01-12 | 1971-03-02 | Stauffer Chemical Co | Ion exchange process for recovering borates from brine |
JPS60102948A (ja) * | 1983-11-11 | 1985-06-07 | Mitsubishi Chem Ind Ltd | ホウ素同位体濃縮用陰イオン交換樹脂 |
JP2002126543A (ja) * | 2000-10-27 | 2002-05-08 | Showa Engineering Co Ltd | イオン含有水の処理方法 |
JP2003073420A (ja) * | 2001-07-03 | 2003-03-12 | Rohm & Haas Co | アニオン交換樹脂の調製法 |
WO2005023409A2 (en) * | 2003-09-05 | 2005-03-17 | Pall Corporation | Arsenic removal |
JP2016141738A (ja) * | 2015-02-02 | 2016-08-08 | 三菱化学株式会社 | 水処理用樹脂及びこれを用いた純水の製造方法 |
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- 2019-11-19 CN CN201980085824.4A patent/CN113272058A/zh active Pending
- 2019-11-19 EP EP19832475.8A patent/EP3887040A1/en active Pending
- 2019-11-19 KR KR1020217019383A patent/KR20210096159A/ko unknown
- 2019-11-19 WO PCT/US2019/062112 patent/WO2020112428A1/en unknown
- 2019-11-19 US US17/293,191 patent/US20220001372A1/en active Pending
- 2019-11-19 JP JP2021529138A patent/JP2022507953A/ja active Pending
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KR20210096159A (ko) | 2021-08-04 |
CN113272058A (zh) | 2021-08-17 |
WO2020112428A1 (en) | 2020-06-04 |
US20220001372A1 (en) | 2022-01-06 |
EP3887040A1 (en) | 2021-10-06 |
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