CA2226522C - Color cathode-ray tube having uniaxial tension focus mask - Google Patents
Color cathode-ray tube having uniaxial tension focus mask Download PDFInfo
- Publication number
- CA2226522C CA2226522C CA002226522A CA2226522A CA2226522C CA 2226522 C CA2226522 C CA 2226522C CA 002226522 A CA002226522 A CA 002226522A CA 2226522 A CA2226522 A CA 2226522A CA 2226522 C CA2226522 C CA 2226522C
- Authority
- CA
- Canada
- Prior art keywords
- thermal expansion
- coefficient
- insulator layer
- ray tube
- metal strands
- 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.)
- Expired - Fee Related
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 114
- 239000002184 metal Substances 0.000 claims abstract description 114
- 239000012212 insulator Substances 0.000 claims abstract description 80
- 238000010894 electron beam technology Methods 0.000 claims abstract description 25
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011521 glass Substances 0.000 claims description 62
- 239000000945 filler Substances 0.000 claims description 42
- 229910000679 solder Inorganic materials 0.000 claims description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 40
- 229910052906 cristobalite Inorganic materials 0.000 claims description 25
- 239000011159 matrix material Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 13
- 229910052681 coesite Inorganic materials 0.000 claims description 9
- 229910052682 stishovite Inorganic materials 0.000 claims description 9
- 229910052905 tridymite Inorganic materials 0.000 claims description 9
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 7
- 239000010453 quartz Substances 0.000 claims description 7
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910052882 wollastonite Inorganic materials 0.000 claims description 5
- 229910052634 enstatite Inorganic materials 0.000 claims description 4
- 239000010436 fluorite Substances 0.000 claims description 4
- 229910052839 forsterite Inorganic materials 0.000 claims description 4
- 229910052844 willemite Inorganic materials 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052661 anorthite Inorganic materials 0.000 claims description 3
- 229910052863 mullite Inorganic materials 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 229910001597 celsian Inorganic materials 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims 6
- 239000000377 silicon dioxide Substances 0.000 claims 4
- 229910007472 ZnO—B2O3—SiO2 Inorganic materials 0.000 claims 3
- 229910017676 MgTiO3 Inorganic materials 0.000 claims 2
- 235000012215 calcium aluminium silicate Nutrition 0.000 claims 2
- 229910052593 corundum Inorganic materials 0.000 claims 2
- 229910001676 gahnite Inorganic materials 0.000 claims 2
- 230000007704 transition Effects 0.000 claims 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 2
- 229910015147 B2O3 SnO2 Inorganic materials 0.000 claims 1
- -1 Mg2Al4Si5O18 Inorganic materials 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000000576 coating method Methods 0.000 description 61
- 239000011248 coating agent Substances 0.000 description 59
- 239000000463 material Substances 0.000 description 36
- 230000000873 masking effect Effects 0.000 description 13
- 239000002904 solvent Substances 0.000 description 8
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 5
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 229910000174 eucryptite Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 229910052644 β-spodumene Inorganic materials 0.000 description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229920005822 acrylic binder Polymers 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000002241 glass-ceramic Substances 0.000 description 2
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 2
- 239000006060 molten glass Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910004762 CaSiO Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910017625 MgSiO Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000006124 glass-ceramic system Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- YNBADRVTZLEFNH-UHFFFAOYSA-N methyl nicotinate Chemical compound COC(=O)C1=CC=CN=C1 YNBADRVTZLEFNH-UHFFFAOYSA-N 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005477 sputtering target Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- FKHIFSZMMVMEQY-UHFFFAOYSA-N talc Chemical compound [Mg+2].[O-][Si]([O-])=O FKHIFSZMMVMEQY-UHFFFAOYSA-N 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
- H01J29/81—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching using shadow masks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/07—Shadow masks
- H01J2229/0722—Frame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/07—Shadow masks
- H01J2229/0727—Aperture plate
- H01J2229/075—Beam passing apertures, e.g. geometrical arrangements
- H01J2229/0755—Beam passing apertures, e.g. geometrical arrangements characterised by aperture shape
- H01J2229/0761—Uniaxial masks having parallel slit apertures, i.e. Trinitron type
Landscapes
- Glass Compositions (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/509,315 US5647653A (en) | 1995-07-26 | 1995-07-26 | Uniaxial tension focus mask materials |
| US08/509,315 | 1995-07-26 | ||
| PCT/US1996/011595 WO1997005641A1 (en) | 1995-07-26 | 1996-07-12 | Color cathode-ray tube having uniaxial tension focus mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2226522A1 CA2226522A1 (en) | 1997-02-13 |
| CA2226522C true CA2226522C (en) | 2002-02-12 |
Family
ID=24026146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002226522A Expired - Fee Related CA2226522C (en) | 1995-07-26 | 1996-07-12 | Color cathode-ray tube having uniaxial tension focus mask |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US5647653A (2) |
| EP (1) | EP0840936B1 (2) |
| JP (1) | JP3419783B2 (2) |
| KR (1) | KR100261738B1 (2) |
| CN (1) | CN1085403C (2) |
| AU (1) | AU6544596A (2) |
| CA (1) | CA2226522C (2) |
| DE (1) | DE69616071T2 (2) |
| IN (1) | IN189894B (2) |
| MX (1) | MX9800725A (2) |
| MY (1) | MY116663A (2) |
| RU (1) | RU2161842C2 (2) |
| TW (1) | TW362232B (2) |
| WO (1) | WO1997005641A1 (2) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100222604B1 (ko) * | 1997-08-29 | 1999-10-01 | 손욱 | 칼라 음극선관의 어퍼쳐 그릴 |
| US6157121A (en) * | 1998-10-13 | 2000-12-05 | Thomson Licensing S.A. | Color picture tube having metal strands spaced from the insulator layers |
| US6246164B1 (en) * | 1999-04-01 | 2001-06-12 | Thomson Licensing S.A. | Color picture tube having a low expansion tension mask attached to a higher expansion frame |
| US6597093B2 (en) * | 2000-12-15 | 2003-07-22 | Thomson Licensing S. A. | Cathode ray tube with a focus mask wherein a cap layer formed on the insulating material |
| US6784606B2 (en) * | 2000-12-20 | 2004-08-31 | Thomson Licensing S. A. | Cathode-ray tube having a focus mask with improved insulator performance |
| US6642643B2 (en) * | 2000-12-20 | 2003-11-04 | Thomson Licensing S.A. | Silicate materials for cathode-ray tube (CRT) applications |
| US6677700B2 (en) * | 2000-12-22 | 2004-01-13 | Thomson Licensing S. A. | Cathode-ray tube having a focus mask using partially conductive insulators |
| US6628057B2 (en) * | 2000-12-22 | 2003-09-30 | Thomson Licensing S. A. | Slightly conducting insulators for cathode-ray tube (CRT) applications |
| US6541901B2 (en) * | 2001-02-26 | 2003-04-01 | Thomson Licensing S.A. | Tension mask frame assembly for a CRT |
| US6720719B2 (en) * | 2001-03-06 | 2004-04-13 | Thomson Licensing S. A. | Resistive coating for a tensioned focus mask CRT |
| US6600258B2 (en) | 2001-10-29 | 2003-07-29 | Thomson Licensing S.A. | Tension mask for a cathode-ray-tube |
| US20040000855A1 (en) * | 2002-06-26 | 2004-01-01 | Benigni Samuel Paul | Insulator system for a CRT focus mask |
| KR100568218B1 (ko) | 2004-10-06 | 2006-04-05 | 삼성전자주식회사 | 휴대용 컴퓨터 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4059781A (en) * | 1974-07-17 | 1977-11-22 | U.S. Philips Corporation | Shadow mask each aperture of which is defined by a quadrupolar lens |
| NL7600418A (nl) * | 1976-01-16 | 1977-07-19 | Philips Nv | Werkwijze voor het vervaardigen van een kleuren- beeldbuis, kleurenbeeldbuis vervaardigd volgens de werkwijze en inrichting voor het uitvoeren van de werkwijze. |
| US4164059A (en) * | 1976-01-16 | 1979-08-14 | U.S. Philips Corporation | Method of manufacturing a color display tube and color display tube manufactured by said method |
| NL7600421A (nl) * | 1976-01-16 | 1977-07-19 | Philips Nv | Werkwijze voor het vervaardigen van een kleuren- beeldbuis en aldus vervaardigde kleurenbeeld- buis. |
| NL7711773A (nl) * | 1977-10-27 | 1979-05-02 | Philips Nv | Kleurenbeeldbuis en werkwijze voor de vervaar- diging van een dergelijke kleurenbeeldbuis. |
| US4650435A (en) * | 1980-12-18 | 1987-03-17 | Rca Corporation | Method of making a focusing color-selection structure for a CRT |
| US4443499A (en) * | 1981-01-26 | 1984-04-17 | Rca Corporation | Method of making a focusing color-selection structure for a CRT |
| NL8102200A (nl) * | 1981-05-06 | 1982-12-01 | Philips Nv | Kleurenbeeldbuis. |
| US4464601A (en) * | 1982-08-11 | 1984-08-07 | Rca Corporation | CRT with quadrupolar-focusing color-selection structure |
| JPS5944752A (ja) * | 1982-09-07 | 1984-03-13 | Sony Corp | カラ−陰極線管 |
| US4470822A (en) * | 1983-02-25 | 1984-09-11 | Rca Corporation | Method of fabricating a metalized electrode assembly |
| US4621214A (en) * | 1984-04-19 | 1986-11-04 | Rca Corporation | Color selection means having a charged insulator portion for a cathode-ray tube |
| US4686416A (en) * | 1986-02-21 | 1987-08-11 | Zenith Electronics Corporation | Color CRT front assembly with tension mask support |
| US5111106A (en) * | 1989-04-12 | 1992-05-05 | Zenith Electronics Corporation | Post-mask-deflection type tension mask color cathode ray tube |
| NL8902758A (nl) * | 1989-11-08 | 1991-06-03 | Philips Nv | Beeldweergave-inrichting en werkwijzen voor het vervaardigen van een beeldweergave-inrichting. |
| US5041756A (en) * | 1990-07-23 | 1991-08-20 | Rca Licensing Corporation | Color picture tube having a tensioned shadow mask and support frame assembly |
| US5045010A (en) * | 1990-07-23 | 1991-09-03 | Rca Licensing Corporation | Method of assemblying a tensioned shadow mask and support frame |
-
1995
- 1995-07-26 US US08/509,315 patent/US5647653A/en not_active Expired - Lifetime
-
1996
- 1996-03-14 TW TW085103045A patent/TW362232B/zh not_active IP Right Cessation
- 1996-07-12 CN CN96195828A patent/CN1085403C/zh not_active Expired - Fee Related
- 1996-07-12 EP EP96925299A patent/EP0840936B1/en not_active Expired - Lifetime
- 1996-07-12 DE DE69616071T patent/DE69616071T2/de not_active Expired - Fee Related
- 1996-07-12 CA CA002226522A patent/CA2226522C/en not_active Expired - Fee Related
- 1996-07-12 RU RU98103454/09A patent/RU2161842C2/ru not_active IP Right Cessation
- 1996-07-12 AU AU65445/96A patent/AU6544596A/en not_active Abandoned
- 1996-07-12 JP JP50761197A patent/JP3419783B2/ja not_active Expired - Fee Related
- 1996-07-12 MX MX9800725A patent/MX9800725A/es not_active IP Right Cessation
- 1996-07-12 KR KR1019980700525A patent/KR100261738B1/ko not_active Expired - Fee Related
- 1996-07-12 WO PCT/US1996/011595 patent/WO1997005641A1/en not_active Ceased
- 1996-07-17 IN IN1301CA1996 patent/IN189894B/en unknown
- 1996-07-26 MY MYPI96003087A patent/MY116663A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| KR100261738B1 (ko) | 2000-07-15 |
| TW362232B (en) | 1999-06-21 |
| WO1997005641A1 (en) | 1997-02-13 |
| EP0840936A1 (en) | 1998-05-13 |
| DE69616071D1 (de) | 2001-11-22 |
| EP0840936B1 (en) | 2001-10-17 |
| MX9800725A (es) | 1998-04-30 |
| IN189894B (2) | 2003-05-03 |
| MY116663A (en) | 2004-03-31 |
| DE69616071T2 (de) | 2002-07-04 |
| KR19990035864A (ko) | 1999-05-25 |
| AU6544596A (en) | 1997-02-26 |
| JP3419783B2 (ja) | 2003-06-23 |
| JPH11510645A (ja) | 1999-09-14 |
| RU2161842C2 (ru) | 2001-01-10 |
| HK1015073A1 (en) | 1999-10-08 |
| CN1191627A (zh) | 1998-08-26 |
| CA2226522A1 (en) | 1997-02-13 |
| CN1085403C (zh) | 2002-05-22 |
| US5647653A (en) | 1997-07-15 |
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| WO2000022644A1 (en) | Color picture tube having a tension focus mask | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |