DE102022127341A1 - Oberflächen-Leimungsmittel für ein Sicherheitspapier, Verfahren zur Oberflächenleimung eines Sicherheitspapiersubstratmaterials, Sicherheitspapier und Wertdokument - Google Patents
Oberflächen-Leimungsmittel für ein Sicherheitspapier, Verfahren zur Oberflächenleimung eines Sicherheitspapiersubstratmaterials, Sicherheitspapier und Wertdokument Download PDFInfo
- Publication number
- DE102022127341A1 DE102022127341A1 DE102022127341.5A DE102022127341A DE102022127341A1 DE 102022127341 A1 DE102022127341 A1 DE 102022127341A1 DE 102022127341 A DE102022127341 A DE 102022127341A DE 102022127341 A1 DE102022127341 A1 DE 102022127341A1
- Authority
- DE
- Germany
- Prior art keywords
- surface sizing
- security
- security paper
- sizing agent
- substrate material
- 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
- 238000004513 sizing Methods 0.000 title claims abstract description 136
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 104
- 239000000758 substrate Substances 0.000 title claims abstract description 99
- 239000000463 material Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000004814 polyurethane Substances 0.000 claims abstract description 91
- 229920002635 polyurethane Polymers 0.000 claims abstract description 90
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 61
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 41
- 239000002270 dispersing agent Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- VPKDCDLSJZCGKE-UHFFFAOYSA-N carbodiimide group Chemical group N=C=N VPKDCDLSJZCGKE-UHFFFAOYSA-N 0.000 claims abstract 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 49
- 239000000835 fiber Substances 0.000 claims description 37
- 229920001519 homopolymer Polymers 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 24
- 229920001577 copolymer Polymers 0.000 claims description 22
- 229920000058 polyacrylate Polymers 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000007639 printing Methods 0.000 claims description 13
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 10
- 229920000570 polyether Polymers 0.000 claims description 10
- 238000004026 adhesive bonding Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000002985 plastic film Substances 0.000 claims description 8
- 229920006255 plastic film Polymers 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 8
- 238000004132 cross linking Methods 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 6
- 239000012209 synthetic fiber Substances 0.000 claims description 6
- 229920002994 synthetic fiber Polymers 0.000 claims description 6
- 238000007127 saponification reaction Methods 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 description 17
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 10
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 9
- 150000001718 carbodiimides Chemical group 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- -1 C22 fatty alcohol Chemical class 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000000976 ink Substances 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 239000013530 defoamer Substances 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 239000002609 medium Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000012945 sealing adhesive Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003009 polyurethane dispersion Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- 239000004970 Chain extender Substances 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229920000615 alginic acid Polymers 0.000 description 2
- 235000010443 alginic acid Nutrition 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- KPSSIOMAKSHJJG-UHFFFAOYSA-N neopentyl alcohol Chemical compound CC(C)(C)CO KPSSIOMAKSHJJG-UHFFFAOYSA-N 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 description 1
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical compound CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 241001295925 Gegenes Species 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 1
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- ZINJLDJMHCUBIP-UHFFFAOYSA-N ethametsulfuron-methyl Chemical compound CCOC1=NC(NC)=NC(NC(=O)NS(=O)(=O)C=2C(=CC=CC=2)C(=O)OC)=N1 ZINJLDJMHCUBIP-UHFFFAOYSA-N 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
- B42D25/465—Associating two or more layers using chemicals or adhesives
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/72—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
Landscapes
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022127341.5A DE102022127341A1 (de) | 2022-10-18 | 2022-10-18 | Oberflächen-Leimungsmittel für ein Sicherheitspapier, Verfahren zur Oberflächenleimung eines Sicherheitspapiersubstratmaterials, Sicherheitspapier und Wertdokument |
| EP23020476.0A EP4357521A1 (fr) | 2022-10-18 | 2023-10-17 | Agent d'encollage de surface pour papier de sécurité, procédé d'encollage de surface d'un matériau de substrat de papier de sécurité, papier de sécurité et document de valeur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022127341.5A DE102022127341A1 (de) | 2022-10-18 | 2022-10-18 | Oberflächen-Leimungsmittel für ein Sicherheitspapier, Verfahren zur Oberflächenleimung eines Sicherheitspapiersubstratmaterials, Sicherheitspapier und Wertdokument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102022127341A1 true DE102022127341A1 (de) | 2024-04-18 |
Family
ID=88417599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102022127341.5A Pending DE102022127341A1 (de) | 2022-10-18 | 2022-10-18 | Oberflächen-Leimungsmittel für ein Sicherheitspapier, Verfahren zur Oberflächenleimung eines Sicherheitspapiersubstratmaterials, Sicherheitspapier und Wertdokument |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4357521A1 (fr) |
| DE (1) | DE102022127341A1 (fr) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3742330A1 (de) | 1987-12-14 | 1989-06-22 | Giulini Chemie | Anionisches oberflaechenleimungsmittel fuer papier |
| DE4040347C2 (de) | 1990-03-15 | 1996-10-24 | Nacional Moneda Timbre | Verfahren zur Herstellung von Sicherheitspapier |
| DE69605026T2 (de) | 1995-03-13 | 2000-03-02 | Rue De Int Ltd | Sicherheitspapier |
| WO2018160804A1 (fr) | 2017-03-01 | 2018-09-07 | Avery Dennison Corporation | Couche de finition pouvant recevoir une impression |
| DE102018001940A1 (de) | 2018-03-09 | 2019-09-12 | Giesecke+Devrient Currency Technology Gmbh | Oberflächenleimungsmittel für ein Papiererzeugnis, seine Verwendung, Papiererzeugnis und Verfahren zum Beschichten eines Papiererzeugnisses |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103877A (zh) * | 2012-12-31 | 2013-05-15 | 天津市奥东化工有限公司 | 表面施胶增强剂 |
-
2022
- 2022-10-18 DE DE102022127341.5A patent/DE102022127341A1/de active Pending
-
2023
- 2023-10-17 EP EP23020476.0A patent/EP4357521A1/fr active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3742330A1 (de) | 1987-12-14 | 1989-06-22 | Giulini Chemie | Anionisches oberflaechenleimungsmittel fuer papier |
| DE4040347C2 (de) | 1990-03-15 | 1996-10-24 | Nacional Moneda Timbre | Verfahren zur Herstellung von Sicherheitspapier |
| DE69605026T2 (de) | 1995-03-13 | 2000-03-02 | Rue De Int Ltd | Sicherheitspapier |
| WO2018160804A1 (fr) | 2017-03-01 | 2018-09-07 | Avery Dennison Corporation | Couche de finition pouvant recevoir une impression |
| DE102018001940A1 (de) | 2018-03-09 | 2019-09-12 | Giesecke+Devrient Currency Technology Gmbh | Oberflächenleimungsmittel für ein Papiererzeugnis, seine Verwendung, Papiererzeugnis und Verfahren zum Beschichten eines Papiererzeugnisses |
| WO2019170287A1 (fr) | 2018-03-09 | 2019-09-12 | Giesecke+Devrient Currency Technology Gmbh | Agent de collage en surface pour un produit en papier, son utilisation, produit en papier et procédé pour le couchage d'un produit en papier |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4357521A1 (fr) | 2024-04-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: D21H0027280000 Ipc: D21H0019100000 |
|
| R163 | Identified publications notified |