DE69738817D1 - Vorrichtung und Verfahren zur gesteuerten Abgabe von Flüssiggas - Google Patents
Vorrichtung und Verfahren zur gesteuerten Abgabe von FlüssiggasInfo
- Publication number
- DE69738817D1 DE69738817D1 DE69738817T DE69738817T DE69738817D1 DE 69738817 D1 DE69738817 D1 DE 69738817D1 DE 69738817 T DE69738817 T DE 69738817T DE 69738817 T DE69738817 T DE 69738817T DE 69738817 D1 DE69738817 D1 DE 69738817D1
- Authority
- DE
- Germany
- Prior art keywords
- gas
- gas cylinder
- liquified
- delivery
- controlled release
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/08—Mounting arrangements for vessels
- F17C13/084—Mounting arrangements for vessels for small-sized storage vessels, e.g. compressed gas cylinders or bottles, disposable gas vessels, vessels adapted for automotive use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/01—Mounting arrangements
- F17C2205/0103—Exterior arrangements
- F17C2205/0111—Boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/01—Mounting arrangements
- F17C2205/0123—Mounting arrangements characterised by number of vessels
- F17C2205/013—Two or more vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/01—Mounting arrangements
- F17C2205/0153—Details of mounting arrangements
- F17C2205/0176—Details of mounting arrangements with ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0338—Pressure regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0341—Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/013—Carbone dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/014—Nitrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0334—Heat exchange with the fluid by heating by radiation means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/04—Methods for emptying or filling
- F17C2227/044—Methods for emptying or filling by purging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/03—Control means
- F17C2250/032—Control means using computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0439—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/02—Improving properties related to fluid or fluid transfer
- F17C2260/023—Avoiding overheating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/02—Improving properties related to fluid or fluid transfer
- F17C2260/024—Improving metering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
- F17C2270/0518—Semiconductors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/753,413 US5761911A (en) | 1996-11-25 | 1996-11-25 | System and method for controlled delivery of liquified gases |
US08/893,499 US6076359A (en) | 1996-11-25 | 1997-07-11 | System and method for controlled delivery of liquified gases |
Publications (1)
Publication Number | Publication Date |
---|---|
DE69738817D1 true DE69738817D1 (de) | 2008-08-21 |
Family
ID=25030537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69738817T Expired - Lifetime DE69738817D1 (de) | 1996-11-25 | 1997-11-17 | Vorrichtung und Verfahren zur gesteuerten Abgabe von Flüssiggas |
Country Status (2)
Country | Link |
---|---|
US (1) | US5761911A (de) |
DE (1) | DE69738817D1 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9506652D0 (en) * | 1995-03-31 | 1995-05-24 | Cryogenic Technology Ltd | Supplying liquid cryogen to cryosurgical apparatus |
US5986240A (en) * | 1998-01-06 | 1999-11-16 | Mg Industries | Method and apparatus for maintaining contents of a compressed gas cylinder at a desired temperature |
US6217659B1 (en) * | 1998-10-16 | 2001-04-17 | Air Products And Chemical, Inc. | Dynamic blending gas delivery system and method |
FR2790307B1 (fr) * | 1999-02-25 | 2001-04-06 | Gaz De Petrole | Appareil d'alimentation en gaz de petrole liquefie a moyens de chauffage |
US6290088B1 (en) | 1999-05-28 | 2001-09-18 | American Air Liquide Inc. | Corrosion resistant gas cylinder and gas delivery system |
US6199384B1 (en) | 1999-07-09 | 2001-03-13 | American Air Liquide Inc. | System and method for controlled delivery of liquefied gases including control aspects |
US6395064B1 (en) | 1999-10-26 | 2002-05-28 | American Air Liquide, Inc | System and method for purifying and distributing chemical gases |
US6276143B1 (en) | 2000-01-18 | 2001-08-21 | Harsco Technologies Corporation | External pressure building circuit for rapid discharge cryogenic liquid cylinder |
FR2807821A1 (fr) * | 2000-04-13 | 2001-10-19 | Air Liquide | Detenteur de fluide avec rechauffeur integre |
FR2808583B1 (fr) * | 2000-05-05 | 2002-08-30 | Air Liquide | Installation de traitement d'objets par un liquide cryogenique |
US6363728B1 (en) | 2000-06-20 | 2002-04-02 | American Air Liquide Inc. | System and method for controlled delivery of liquefied gases from a bulk source |
US20020124575A1 (en) * | 2001-01-05 | 2002-09-12 | Atul Pant | Gas delivery at high flow rates |
US6474077B1 (en) | 2001-12-12 | 2002-11-05 | Air Products And Chemicals, Inc. | Vapor delivery from a low vapor pressure liquefied compressed gas |
CN100423340C (zh) * | 2003-09-12 | 2008-10-01 | 亚太燃料电池科技股份有限公司 | 储氢容器的加热装置及方法 |
GB0322027D0 (en) * | 2003-09-19 | 2003-10-22 | Prototech As | Storage of pressurised fluids |
FR2863341A1 (fr) * | 2003-12-04 | 2005-06-10 | Air Liquide Electronics Sys | Systeme de chauffage de bouteilles de gaz liquefie par induction |
FR2871549B1 (fr) * | 2004-06-11 | 2006-08-04 | Air Liquide | Procede de production de gaz carbonique liquide et application a la production de gaz carbonique supercritique |
US20070163273A1 (en) * | 2006-01-17 | 2007-07-19 | American Air Liquide, Inc. | Liquid Purge for a Vaporizer |
US20070204631A1 (en) * | 2006-03-03 | 2007-09-06 | American Air Liquide, Inc. | Liquefied Chemical Gas Delivery System |
IL180875A0 (en) * | 2007-01-22 | 2007-07-04 | Ricor Ltd | Gas purge method and apparatus |
US8468840B2 (en) * | 2008-07-24 | 2013-06-25 | Praxair Technology | Method and apparatus for simultaneous gas supply from bulk specialty gas supply systems |
FR3054018B1 (fr) | 2016-07-13 | 2018-08-10 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Distribution d'un melange gazeux dielectrique vers un appareillage haute tension |
CN106870935A (zh) * | 2017-02-07 | 2017-06-20 | 大连大特气体有限公司 | 多瓶位一次性气瓶充装装置 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2842942A (en) * | 1955-08-25 | 1958-07-15 | Herrick L Johnston Inc | Apparatus for dispensing gas from a container of liquefied gas |
US3282305A (en) * | 1964-02-20 | 1966-11-01 | Gen Dynamics Corp | Cylinder filling apparatus |
US3650290A (en) * | 1968-11-19 | 1972-03-21 | Air Reduction | Pressure control system for cryogenic fluids |
US3648018A (en) * | 1970-02-05 | 1972-03-07 | Dow Chemical Co | Transfer device for cryogenic fluids |
US3729946A (en) * | 1971-05-26 | 1973-05-01 | A Massey | Cryogenic liquid handling system |
US4219725A (en) * | 1978-08-01 | 1980-08-26 | The Dow Chemical Company | Heating apparatus for vaporizing liquefied gases |
FR2542421B1 (fr) * | 1983-03-08 | 1985-07-05 | Air Liquide | Procede et appareil pour produire un gaz a haute purete par vaporisation d'un liquide cryogenique |
DE3506932A1 (de) * | 1985-02-27 | 1986-08-28 | Messer Griesheim Gmbh, 6000 Frankfurt | Vorrichtung zur erzeugung eines trockenen kalten gasstromes |
GB8529979D0 (en) * | 1985-12-05 | 1986-01-15 | Fern Medical Developments Ltd | Transfer system |
US4989160A (en) * | 1988-05-17 | 1991-01-29 | Sci Systems, Inc. | Apparatus and method for controlling functions of automated gas cabinets |
WO1990009233A1 (en) * | 1989-02-16 | 1990-08-23 | Pawliszyn Janusz B | Apparatus and method for delivering supercritical fluid |
JPH02298774A (ja) * | 1989-05-10 | 1990-12-11 | Seiko Instr Inc | 自動冷却装置 |
EP0454531B1 (de) * | 1990-04-20 | 1998-01-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Verfahren und Einrichtung zur Herstellung von ultrareinem Stickstoff |
US5582016A (en) * | 1992-05-07 | 1996-12-10 | Aerospace Design & Development, Inc. | Conditioning and loading apparatus and method for gas storage at cryogenic temperature and supercritical pressure |
US5359787A (en) * | 1993-04-16 | 1994-11-01 | Air Products And Chemicals, Inc. | High purity bulk chemical delivery system |
US5373701A (en) * | 1993-07-07 | 1994-12-20 | The Boc Group, Inc. | Cryogenic station |
US5426944A (en) * | 1993-08-31 | 1995-06-27 | American Air Liquide, Inc. | Chemical purification for semiconductor processing by partial condensation |
US5377495A (en) * | 1994-06-27 | 1995-01-03 | Daigle; Regis G. | Temperature controlled thermal jacket for transfering refrigerant |
US5557940A (en) * | 1995-10-27 | 1996-09-24 | Hendricks; Roger G. | Portable heating unit for on-site charging of a cooling unit |
-
1996
- 1996-11-25 US US08/753,413 patent/US5761911A/en not_active Expired - Lifetime
-
1997
- 1997-11-17 DE DE69738817T patent/DE69738817D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5761911A (en) | 1998-06-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |