DE2928980A1 - METHOD FOR FORMING A METAL OXIDE FILM ON GLASS TUBES - Google Patents
METHOD FOR FORMING A METAL OXIDE FILM ON GLASS TUBESInfo
- Publication number
- DE2928980A1 DE2928980A1 DE19792928980 DE2928980A DE2928980A1 DE 2928980 A1 DE2928980 A1 DE 2928980A1 DE 19792928980 DE19792928980 DE 19792928980 DE 2928980 A DE2928980 A DE 2928980A DE 2928980 A1 DE2928980 A1 DE 2928980A1
- Authority
- DE
- Germany
- Prior art keywords
- glass
- tube
- metal compound
- oxide film
- metal oxide
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 16
- 229910044991 metal oxide Inorganic materials 0.000 title claims description 5
- 150000004706 metal oxides Chemical class 0.000 title claims description 5
- 239000011521 glass Substances 0.000 claims description 20
- 150000002736 metal compounds Chemical class 0.000 claims description 11
- 239000007800 oxidant agent Substances 0.000 claims description 7
- 238000009835 boiling Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000006060 molten glass Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- -1 indium chloride Chemical class 0.000 description 1
- PSCMQHVBLHHWTO-UHFFFAOYSA-K indium(iii) chloride Chemical compound Cl[In](Cl)Cl PSCMQHVBLHHWTO-UHFFFAOYSA-K 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/02—Forming molten glass coated with coloured layers; Forming molten glass of different compositions or layers; Forming molten glass comprising reinforcements or inserts
- C03B17/025—Tubes or rods
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/04—Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
- C03C17/245—Oxides by deposition from the vapour phase
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/04—Coating on selected surface areas, e.g. using masks
- C23C16/045—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/229—Non-specific enumeration
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/15—Deposition methods from the vapour phase
- C03C2218/152—Deposition methods from the vapour phase by cvd
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Surface Treatment Of Glass (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Description
Stand der Technik:State of the art:
Das Herstellen von Glasröhren, beispielsweise für die Produktion von Leuchtstofflampen, nach US-PS 2.0Q9.793 geschieht, indem aus einem Behälter mit geschmolzenem Glas mittels eines konischen Doms in dem Ausfluß zunächst unter Einwirkung der Schwerkraft ein Schlauch aus noch erweichtem Glas entsteht, der dann mittels Ziehwagen in die Horizontale umgelenkt wird. Danach werden die gewünschten Längen der Glasrohre abgeschnitten.The manufacture of glass tubes, for example for the production of fluorescent lamps, is done according to US-PS 2.0Q9.793, by first acting out of a container with molten glass by means of a conical dome in the spout Gravity creates a tube made of still softened glass, which is then moved horizontally by means of a pulling carriage is diverted. Then the required lengths of the glass tubes are cut.
Das Aufbringen oder Niederschlagen eines Belages oder Films von Metalloxyd auf der inneren Oberfläche von Glasröhren, insbesondere für die Herstellung von Leuchtstofflampen, ist aus den US-Patenten 4.058.639, 4ϊ020.385, 3.9Β7.331, 3.676.729, 3.379.917 und 3.205.394 bekannt. Dabei wurden Oxyde von Aluminium, Zinn, Zirkonium, Indium, Titan oder Silizium verwendet. The application or deposition of a coating or film of metal oxide on the inner surface of glass tubes, especially for the production of fluorescent lamps from US patents 4,058,639, 4,020,385, 3,9-7,331, 3,676,729, 3,379,917 and 3,205,394 known. Oxides of aluminum, Tin, zirconium, indium, titanium or silicon are used.
Bislang wurden derartige Filme oder Beläge auf dem Glas nach dar Röhrenherstellung und dem Schneiden auf gewünschte Längen meist durch Besprühen oder Spülen -aufgebracht.Heretofore, such films or deposits have been placed on the glass after the tubes have been manufactured and cut to desired lengths mostly applied by spraying or rinsing.
Die Güte dieser Beläge konnte noch nicht befriedigen nach den dafür angewendeten Verfahren, die relativ aufwendig waren.The quality of these coverings could not yet be satisfactory after the methods used for them, which were relatively complex.
030008/0643030008/0643
Aufgabe:Task:
Der Erfindung lag die Aufgabe zugrunde, ein Verfahren zu finden, das einfacher und wirtschaftlicher ist und Filme oder Beläge liefert, die sehr gleichmäßig und gut haftend sind.The invention was based on the object to find a method that is simpler and more economical and films or Provides coverings that are very even and stick well.
Diese Aufgabe wird nach der Erfindung durch ein Verfahren gelöst, dessen kennzeichnende Schritte gemäß dem Hauptanspruch in Kombination beansprucht werden.This object is achieved according to the invention by a method, the characterizing steps of which are in accordance with the main claim can be claimed in combination.
Weitere Einzelheiten und Ausgestaltungen sind den übrigen Ansprüchen und der Beschreibung zu entnehmen.Further details and configurations can be found in the remaining claims and the description.
Die Erfindung und ihre Vorteile:The invention and its advantages:
Nach dem Verfahren gemäß der Erfindung wird der gewünschte Belag während des Ziehens auf dem noch weichen Glas erzeugt, indem im hohlen Dorn der Vorrichtung nach US-PS 2.009.793 mittels einer zentrisch angeordneten Röhre, die in den Schlauchbereich ragt, die verdampfte Metallverbindung injiziert wird und unmittelbar an der Oberfläche des weichen Glases durch gleichzeitiges Einströmen von einer Oxydier-Agens, wie beispielsweise Luft, reagiert und einen Metalloxydfilm auf der inneren Glasoberfläche bildet. Der so gebildete Film besitzt die gewünschte Güte, indem die Temperaturen und Temperatur-Beziehungen genau geregelt werden. Das Verfahren ist denkbar einfach und kostengünstig.According to the method according to the invention, the desired coating is produced on the still soft glass while drawing, by in the hollow mandrel of the device according to US Pat. No. 2,009,793 by means of a centrally arranged tube which is inserted into the Tubing area protrudes, the vaporized metal compound is injected and immediately on the surface of the soft Glass reacts by the simultaneous influx of an oxidizing agent, such as air, and a metal oxide film forms on the inner glass surface. The film formed in this way has the desired quality by changing the temperatures and temperature relationships are precisely regulated. The process is very simple and inexpensive.
030008/0643030008/0643
- -BT -- -BT -
Zeichnung:Drawing:
Das Verfahren gemäß der Erfindung wird nunmehr anhand der Zeichnung beschrieben, die aus einer Figur besteht und eine schematische Darstellung der Vorrichtung zur Durchführung des Verfahrens zeigt.The method according to the invention will now be based on FIG Description of the drawing, which consists of a figure and a schematic representation of the device for implementation of the procedure shows.
Beschreibung:Description:
Wie die Zeichnung zeigt, ist ein Behälter 1 mit geschmolzenem Glas 2 gefüllt und besitzt in seinem Boden eine Öffnung, die mit einem Dorn 3 regelbar ist. Über diesen Dorn 3 entsteht ein Schlauch 4 aus noch weichem Glas,der mittels der Ziehwalzen 5 zu der gewünschten Glasröhre B in die Horizontale gezogen wird. Das ist das nach dem genannten Patent bekannte Verfahren. Das Verfahren nach der Erfindung sieht nun vor, daß ein Behälter 7 eine Metallverbindung enthält, deren Dämpfe über die Leitung 8 der Röhre 9 zugeführt wird, die zentrisch im hohlen Dorn 3 angeordnet ist und mit ihrem Ende in den Schlauchbereich ragt.As the drawing shows, a container 1 with melted Glass 2 is filled and has an opening in its bottom which can be regulated with a mandrel 3. About this mandrel 3 arises a tube 4 of still soft glass, which by means of the drawing rollers 5 to the desired glass tube B in the horizontal is pulled. This is the method known from the patent mentioned. The method according to the invention provides now before that a container 7 contains a metal compound, whose vapors are fed via the line 8 of the tube 9, which is arranged centrally in the hollow mandrel 3 and with her End protrudes into the hose area.
Die Metallverbindung wird im Behälter 7 auf ihrem Siedepunkt oder kanpp darüber gehalten, so daß ein Transport in Gasform über die Leitung 8 und die Röhre 9 in den Schlauch 4 möglich ist. Wenn zum Beispiel der gewünschte Qxydfilm Zinn-The metal compound is kept in the container 7 at its boiling point or just above it, so that it can be transported in gaseous form via the line 8 and the tube 9 into the hose 4 is possible. For example, if the desired oxide film is tin
030008/0643030008/0643
oxyd ist, könnte die Metallverhindung Zinn-Tetrachlorid sein und die Temperatur des Behälters 7 müßte auf 1140C oder knapp höher eingestellt werden, dem Siedepunkt der Verbindung. Falls ein Titanoxydfilm erzeugt werden soll,, kann Titan-Tetrachlorid verwendet werden, dessen Siedepunkt -bei 136° C liegt.oxide, the Metallverhindung tin tetrachloride may be and the temperature of the container 7 ought to 114 0 C, or be set close higher, the boiling point of the compound. If a titanium oxide film is to be produced, titanium tetrachloride with a boiling point of 136 ° C can be used.
Es ist notwendig, eine Oxydier-Agens zu verwenden, die gleichzeitig im Schlauch 4 durch Injektion vorhanden sein muß, damit die Reaktion mit der Metallverbindung stattfindet und der geforderte Metalloxydbelag auf der Glasoberfläche entsteht. Gewöhnlich ist die Qxydier-Agens Luft, die durch das angesetzte Rohr 10 angesaugt oder eingeblasen wird und um die Röhre 9 herum innerhalb des Dorns 3 strömend in den Schlauch 4 gelangt.It is necessary to use an oxidizing agent at the same time must be present in the tube 4 by injection so that the reaction with the metal compound takes place and the required metal oxide coating is created on the glass surface. Usually the oxidizing agent is air which is produced by the attached pipe 10 is sucked or blown in and around the tube 9 flows around inside the mandrel 3 into the hose 4.
Die Metallverbindung, z.B. Indiumchlorid, kann im Behälter in flüssiger Form bewahrt werden, knapp unter dem Siedepunkt und könnte mit Hilfe eines Transportgases, das Blasen bildend eingeblasen wird [beispielweise Luft), über die Leitung 8 bis in den Schlauch 4 bewegt werden. In diesem Fall kann die Luft gleichzeitig als Oxydier-Agens im Schlauch wirken.The metal compound, e.g. indium chloride, can be stored in the container in liquid form, just below the boiling point and could with the help of a transport gas that is blown in to form bubbles [for example air), via the line 8 can be moved into the tube 4. In this case, the air can also act as an oxidizing agent in the hose works.
Die Leitung B.und die Röhre 9 müssen durch Umwickeln mit Heizbändern auf solchen Temperaturen gehalten werden, daß keine Kondensation der verdampften Metallverbindung in ihnen stattfindet.The line B. and the tube 9 must be wrapped with Heating tapes are kept at such temperatures that no condensation of the vaporized metal compound in them takes place.
In dem Fall, bei welchem ein Transportgas wie Luft durch den Behälter 7 geblasen wird und auch als Gxydier-AgensIn the case where a transport gas such as air is blown through the container 7 and also as a oxidizing agent
— f\ —- f \ -
030008/0643030008/0643
wirksam ist, muß darauf geachtet werden, daß die Temperatur in der Leitung B und der Röhre 9 unter der Temperatur bleibt, bei der die Reaktion zwischen der Metallverbindung und der Oxydier-Agens stattfindet. Bei ordentlichem Betrieb des Verfahrens sollte die Reaktion im Schlauch 4 geschehen, wo die Glastsmperatur zwischen etwa BOQ0 C und 9BQ0 C ist.is effective, care must be taken that the temperature in the line B and the tube 9 remains below the temperature at which the reaction between the metal compound and the oxidizing agent takes place. If the method is operating properly, the reaction should take place in the tube 4, where the glass temperature is between approximately BOQ 0 C and 9BQ 0 C.
030008/0041030008/0041
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US93133178A | 1978-08-07 | 1978-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2928980A1 true DE2928980A1 (en) | 1980-02-21 |
Family
ID=25460616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19792928980 Withdrawn DE2928980A1 (en) | 1978-08-07 | 1979-07-18 | METHOD FOR FORMING A METAL OXIDE FILM ON GLASS TUBES |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5523099A (en) |
| BE (1) | BE878089A (en) |
| BR (1) | BR7902379A (en) |
| DE (1) | DE2928980A1 (en) |
| GB (1) | GB2027689A (en) |
| IT (1) | IT1122414B (en) |
| MX (1) | MX152523A (en) |
| NL (1) | NL7906006A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707819A1 (en) * | 1997-02-27 | 1998-09-10 | Elan Schaltelemente Gmbh | Current operating circuit with incorporated safety function |
| DE102014019238A1 (en) * | 2014-12-19 | 2016-06-23 | Hochschule München | Coating of the inner wall of tubular substrates |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03238747A (en) * | 1990-02-16 | 1991-10-24 | Matsushita Electric Ind Co Ltd | Metal vapor discharge lamp and manufacture thereof |
| NL9100335A (en) * | 1991-02-26 | 1992-09-16 | Philips Nv | METHOD FOR MANUFACTURING TUBE GLASS. |
| DE50006669D1 (en) | 1999-09-15 | 2004-07-08 | Schott Rohrglas Gmbh | Method and device for producing internally tempered glass tubes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS476044U (en) * | 1971-02-12 | 1972-09-20 | ||
| DE2330158C2 (en) * | 1973-06-08 | 1975-02-27 | Siemens Ag, 1000 Berlin Und 8000 Muenchen |
-
1979
- 1979-04-19 BR BR7902379A patent/BR7902379A/en unknown
- 1979-07-18 DE DE19792928980 patent/DE2928980A1/en not_active Withdrawn
- 1979-08-03 IT IT24907/79A patent/IT1122414B/en active
- 1979-08-03 MX MX178765A patent/MX152523A/en unknown
- 1979-08-06 BE BE2/57996A patent/BE878089A/en not_active IP Right Cessation
- 1979-08-06 NL NL7906006A patent/NL7906006A/en not_active Application Discontinuation
- 1979-08-06 JP JP9951679A patent/JPS5523099A/en active Granted
- 1979-08-06 GB GB7927288A patent/GB2027689A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707819A1 (en) * | 1997-02-27 | 1998-09-10 | Elan Schaltelemente Gmbh | Current operating circuit with incorporated safety function |
| DE19707819B4 (en) * | 1997-02-27 | 2004-04-22 | Elan Schaltelemente Gmbh & Co. Kg | Circuit arrangement with safety function |
| DE102014019238A1 (en) * | 2014-12-19 | 2016-06-23 | Hochschule München | Coating of the inner wall of tubular substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| BR7902379A (en) | 1980-10-07 |
| JPS5523099A (en) | 1980-02-19 |
| JPS629542B2 (en) | 1987-02-28 |
| GB2027689A (en) | 1980-02-27 |
| BE878089A (en) | 1979-12-03 |
| IT1122414B (en) | 1986-04-23 |
| NL7906006A (en) | 1980-02-11 |
| MX152523A (en) | 1985-08-16 |
| IT7924907A0 (en) | 1979-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OGA | New person/name/address of the applicant | ||
| 8128 | New person/name/address of the agent |
Representative=s name: LEMKE, J., DIPL.-ING., PAT.-ANW., 8900 AUGSBURG |
|
| 8139 | Disposal/non-payment of the annual fee |