EP0309850B1 - Spurious electromagnetic-mode suppression arrangement in a waveguide installation - Google Patents
Spurious electromagnetic-mode suppression arrangement in a waveguide installation Download PDFInfo
- Publication number
- EP0309850B1 EP0309850B1 EP88115332A EP88115332A EP0309850B1 EP 0309850 B1 EP0309850 B1 EP 0309850B1 EP 88115332 A EP88115332 A EP 88115332A EP 88115332 A EP88115332 A EP 88115332A EP 0309850 B1 EP0309850 B1 EP 0309850B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- filter
- arrangement according
- mode
- halves
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
- H01P1/162—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion absorbing spurious or unwanted modes of propagation
Definitions
- the invention relates to an arrangement for eliminating disturbing electromagnetic waveforms in waveguide systems with waveguide sections of the same or different rectangular cross-section, in which in the waveguide a surface filter forming a mode filter is arranged from a plate-shaped metal-coated dielectric carrier element, which is in the plane in the middle of the Broad side extends over a suitable length in the axial direction to the waveguide.
- a surface filter forming a mode filter is arranged from a plate-shaped metal-coated dielectric carrier element, which is in the plane in the middle of the Broad side extends over a suitable length in the axial direction to the waveguide.
- One way to reduce attenuation in waveguides is to operate the line above its uniqueness limit.
- DE 31 30 209 A1 describes a line for the transmission of electromagnetic energy in the microwave range with a waveguide of rectangular or elliptical cross-section, which operates in a frequency range that is far above its unambiguity limit and in its end ranges is each connected to a pyramid-shaped waveguide transition, the free end of which has a cross section such that it lies in the unambiguous range for the electromagnetic wave to be transmitted.
- This embodiment is directed in particular to a rectangular waveguide of the designation SIRAL, which is operated in the ambiguous low-damping frequency range and has a mode filter for damping higher wave types, consisting of a damping plate located in the middle of the plane of the broad side and held in a foam body that completely fills the cross section. Losses and transferable performance are strongly influenced by the foam material.
- the invention has for its object to provide a solution for an arrangement of the type mentioned in the least possible loss, free of higher wave types energy transfer.
- the mode filter is divided into two filter halves, one of which is inserted flush in the respective end region of two waveguide sections which are to be connected to one another, and which are only provided by narrow lateral webs of foam which rest against their inner wall are held.
- the mode filter according to the invention which attenuates excited wave types directly at the point at which they are generated and has almost no influence on the basic wave type modulated with the signal.
- the mode filter as shown in FIGS. 1 to 3, consists of a damping plate with a wall thickness of 0.05 to 2 mm, preferably 0.2 mm, of a dielectric substrate, in particular of glass fiber reinforced epoxy resin with a vapor-deposited metal layer, the surface resistance of which is 100 is up to 600 ⁇ .
- this damping plate is designated 2 for a straight waveguide section according to FIG. 2, and 5 for a mode filter 4 in the cone for a waveguide transition according to FIG. 3.
- the damping plate 2.5 is in the rectangular waveguide (SIRAL) in the plane in the middle of the
- SIRAL rectangular waveguide
- the broad side of the waveguide is arranged (perpendicular to the E-vector of the basic wave type) and is only held by small webs made of foam 3 or 6, which rest on the narrow sides of the waveguide.
- the mode filter is inserted into the waveguide transitions at both ends of the line, which enable connection to devices and antennas, and into waveguide couplings when connecting waveguide sections of the same cross-sectional dimensions in order to dampen the wave types that arise due to the small inhomogeneities of the waveguide.
- a particular advantage of the mode filter according to the invention is that a filter half can be inserted flush into each waveguide part in a simple manner when producing a waveguide.
- the assembly for this is shown in FIGS. 4 and 5, wherein first a filter half 1 is inserted flush into the laterally offset waveguide ends 7, 8 and then the waveguide is connected when the waveguide ends are in the same position (FIG. 5).
- FIGS. 4 and 5 The assembly for this is shown in FIGS. 4 and 5, wherein first a filter half 1 is inserted flush into the laterally offset waveguide ends 7, 8 and then the waveguide is connected when the waveguide ends are in the same position (FIG. 5).
- FIG. 6 shows a corresponding representation of the connection of a waveguide 8 to a waveguide transition 9, a filter half 1 according to FIG. 2 being inserted in the end region at the interface in the waveguide end piece 8 and a filter half 4 in the conical shape according to FIG. 3 being inserted in the waveguide transition 9.
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Description
Die Erfindung bezieht sich auf eine Anordnung zur Beseitigung störender elektromagnetischer Schwingungsformen in Hohlleiteranlagen mit Hohlleiterabschnitten gleichen oder unterschiedlichen Rechteck-Querschnitts, bei der im Hohlleiter ein ein Modenfilter bildender Flächenwiderstand aus einem plattenförmigen metallbeschichteten dielektrischen Trägerelement angeordnet ist, der sich in der Ebene in der Mitte der Breitseite über eine geeignete Länge in axialer Richtung zum Hohlleiter erstreckt. Eine solche Anordnung ist im wesentlichen aus der DE-AS 1 244 259 bekannt.The invention relates to an arrangement for eliminating disturbing electromagnetic waveforms in waveguide systems with waveguide sections of the same or different rectangular cross-section, in which in the waveguide a surface filter forming a mode filter is arranged from a plate-shaped metal-coated dielectric carrier element, which is in the plane in the middle of the Broad side extends over a suitable length in the axial direction to the waveguide. Such an arrangement is essentially known from DE-AS 1 244 259.
Im Richtfunk und Satellitenfunk ist es wichtig, eine möglichst verlustarme Energieleitung zwischen Geräten und Antennen einzusetzen. In Übertragungsbereichen oberhalb 3 GHz werden deshalb Hohlleiter verwendet, die im Grundwellenbereich arbeiten. Bei Frequenzen oberhalb 10 GHz ist auch die Dämpfung von Hohlleitern, die im eindeutigen Frequenzbereich betrieben werden, meist zu hoch, so daß bei längeren Antennenzuleitungen ein erheblicher Verlust an Sende- und Empfangsenergie entsteht. So beträgt z. B. die Dämpfung der Hohlleitung R 220 im Bereich 18,7 GHz mehr als 50 dB/100m.In directional radio and satellite radio, it is important to use a low-loss power line between devices and antennas. In transmission ranges above 3 GHz, waveguides are therefore used that work in the fundamental wave range. At frequencies above 10 GHz, the attenuation of waveguides that are operated in the clear frequency range is usually too high, so that there is a considerable loss of transmission and reception energy with longer antenna feed lines. So is z. B. the attenuation of the waveguide R 220 in the 18.7 GHz range more than 50 dB / 100m.
Eine Möglichkeit, die Dämpfung in Hohlleitern zu verringern, ist der Betrieb der Leitung oberhalb seiner Eindeutigkeitsgrenze.One way to reduce attenuation in waveguides is to operate the line above its uniqueness limit.
In der DE 31 30 209 A1 ist eine Leitung zur Übertragung von elektromagnetischer Energie im Mikrowellenbereich beschrieben mit einem Hohlleiter rechteckförmigen oder elliptischen Querschnitts, der in einem weit oberhalb seiner Eindeutigkeitsgrenze liegenden Frequenzbereich arbeitet und in seinen Endbereichen jeweils mit einem pyramidenförmigen Hohlleiterübergang verbunden ist, deren freies Ende einen Querschnitt solcher Abmessung aufweist, daß er für die zu übertragende elektromagnetische Welle im Eindeutigkeitsbereich liegt. Diese Ausführungsform ist im besonderen auf einen Rechteckhohlleiter der Bezeichnung SIRAL gerichtet, der im mehrdeutigen dämpfungsarmen Frequenzbereich betrieben wird und zur Dämpfung höherer Wellentypen ein Modenfilter aufweist, bestehend aus einer in der Ebene der Breitseite mittig liegenden, in einem den Querschnitt voll ausfüllenden Schaumstoffkörper gehaltenen Dämpfungsplatte. Verluste und übertragbare Leistung werden stark durch das Schaummaterial mitbestimmt.DE 31 30 209 A1 describes a line for the transmission of electromagnetic energy in the microwave range with a waveguide of rectangular or elliptical cross-section, which operates in a frequency range that is far above its unambiguity limit and in its end ranges is each connected to a pyramid-shaped waveguide transition, the free end of which has a cross section such that it lies in the unambiguous range for the electromagnetic wave to be transmitted. This embodiment is directed in particular to a rectangular waveguide of the designation SIRAL, which is operated in the ambiguous low-damping frequency range and has a mode filter for damping higher wave types, consisting of a damping plate located in the middle of the plane of the broad side and held in a foam body that completely fills the cross section. Losses and transferable performance are strongly influenced by the foam material.
Der Erfindung liegt die Aufgabe zugrunde, für eine Anordnung der eingangs genannten Art eine Lösung für eine möglichst verlustarme, von höheren Wellentypen freie Energieübertragung zu schaffen.The invention has for its object to provide a solution for an arrangement of the type mentioned in the least possible loss, free of higher wave types energy transfer.
Diese Aufgabe wird gemäß der Erfindung in der Weise gelöst, daß das Modenfilter in zwei Filterhälften unterteilt ist, von deden je eines im jeweiligen Endbereich von zwei miteinander zu verbindenden Hohlleiterabschnitten bündig abschließend eingesetzt ist, die lediglich durch an deren Innenwandung anliegende schmale seitliche Stege aus Schaumstoff gehalten sind.This object is achieved according to the invention in such a way that the mode filter is divided into two filter halves, one of which is inserted flush in the respective end region of two waveguide sections which are to be connected to one another, and which are only provided by narrow lateral webs of foam which rest against their inner wall are held.
Vorteilhafte Ausgestaltungen und Weiterbildungen des Erfindungsgegenstandes sind in den Unteransprüchen angegeben.Advantageous refinements and developments of the subject matter of the invention are specified in the subclaims.
Nachstehend wird die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail below on the basis of exemplary embodiments illustrated in the drawing.
Es zeigen
- Figuren 1 und 2
- eine Filterhälfte für einen Hohlleiter in der Vorderansicht und Draufsicht,
Figur 3- eine Filterhälfte für einen Hohlleiterübergang in einer Draufsicht,
Figuren 4 und 5- in zwei Teildarstellungen die Montage von Filterhälften in zwei Hohlleiterenden und
- Figur 6
- die Verbindung eines Hohlleiterendstücks mit einem Hohlleiterübergang mit eingesetzten Filterhälften.
- Figures 1 and 2
- a filter half for a waveguide in the front view and top view,
- Figure 3
- a filter half for a waveguide transition in a plan view,
- Figures 4 and 5
- the assembly of filter halves in two waveguide ends and
- Figure 6
- the connection of a waveguide end piece with a waveguide transition with inserted filter halves.
Höhere Wellentypen, die zusätzlich zum Grundwellentyp an inhomogenen Stellen einer Hohlleitung entstehen können, bewirken resonanzartige Einbrüche der Durchgangsdämpfung, die die Übertragungseigenschaften der Leitung verschlechtern können. Zur Dämpfung dieser höheren Wellentypen ist das erfindungsgemäße Modenfilter vorgesehen, das angeregte Wellentypen direkt am Ort ihrer Entstehung dämpft und den mit dem Signal modulierten Grundwellentyp fast nicht beeinflußt.Higher wave types, which can arise in addition to the basic wave type at inhomogeneous points of a hollow line, cause resonance-like drops in the transmission loss, which can impair the transmission properties of the line. To attenuate these higher wave types, the mode filter according to the invention is provided, which attenuates excited wave types directly at the point at which they are generated and has almost no influence on the basic wave type modulated with the signal.
Das Modenfilter, wie es in den Figuren 1 bis 3 dargestellt ist, besteht aus einer Dämpfungsplatte mit einer Wandstärke von 0,05 bis 2 mm, vorzugsweise 0,2 mm aus einem dielektrischen Substrat, insbesondere aus glasfaserverstärktem Epoxidharz mit aufgedampfter Metallschicht, dessen Oberflächenwiderstand 100 bis 600Ω beträgt. Diese Dämpfungsplatte ist beim Modenfilter 1 für einen geraden Hohlleiterabschnitt gemäß Figur 2 mit 2 bezeichnet, für ein Modenfilter 4 im Konus für einen Hohlleiterübergang gemäß Figur 3 mit 5. Die Dämpfungsplatte 2,5 ist im Rechteckhohlleiter (SIRAL) in der Ebene in der Mitte der Breitseite des Hohlleiters angeordnet (senkrecht zum E-Vektor des Grundwellentyps) und wird lediglich durch kleine Stege aus Schaumstoff 3 bzw. 6 gehalten, die an den Schmalseiten des Hohlleiters aufliegen. Diese tragen nur sehr wenig zur Dämpfung des Grundwellentyps bei, da der leistungsführende Querschnittsbereich des Hohlleiters fast völlig von störendem und dämpfendem Trägermaterial frei bleibt. Die Verluste des Modenfilters sind dadurch sehr gering.The mode filter, as shown in FIGS. 1 to 3, consists of a damping plate with a wall thickness of 0.05 to 2 mm, preferably 0.2 mm, of a dielectric substrate, in particular of glass fiber reinforced epoxy resin with a vapor-deposited metal layer, the surface resistance of which is 100 is up to 600Ω. In the mode filter 1, this damping plate is designated 2 for a straight waveguide section according to FIG. 2, and 5 for a
Das Modenfilter wird in die Hohlleiterübergänge an beiden Enden der Leitung, die den Anschluß an Geräte und Antennen ermöglichen, sowie in Hohlleiterkupplungen bei der Verbindung von Hohlleiterabschnitten gleicher Querschnittsabmessungen eingeschoben, um die an den kleinen Inhomogenitäten des Hohlleiters entstehenden Wellentypen wegzudämpfen.The mode filter is inserted into the waveguide transitions at both ends of the line, which enable connection to devices and antennas, and into waveguide couplings when connecting waveguide sections of the same cross-sectional dimensions in order to dampen the wave types that arise due to the small inhomogeneities of the waveguide.
Ein besonderer Vorteil des erfindungsgemäßen Modenfilters besteht darin, daß beim Herstellen einer Hohlleiter in einfacher Weise in jedes Hohlleiterteil eine Filterhälfte bündig eingeschoben werden kann. Die Montage hierfür zeigen die Figuren 4 und 5, wobei zunächst in die seitlich versetzten Hohlleiterenden 7, 8 jeweils eine Filterhälfte 1 bündig eingeschoben wird und dann bei achsengleicher Lage der Hohlleiterenden die Verbindung der Hohlleiter erfolgt (Figur 5). Damit wird also die bei der Montage erwünschte einfache Verbindung der beiden Hohlleiterschnittstellen durch seitliches Übereinanderschieben und anschließende Kupplungsmontage problemlos ermöglicht. Flansche zur Verbindung der beiden Hohlleiterabschnitte wurden in der vereinfachten Darstellung nicht mit eingezeichnet.A particular advantage of the mode filter according to the invention is that a filter half can be inserted flush into each waveguide part in a simple manner when producing a waveguide. The assembly for this is shown in FIGS. 4 and 5, wherein first a filter half 1 is inserted flush into the laterally
Figur 6 zeigt eine entsprechende Darstellung der Verbindung eines Hohlleiters 8 mit einem Hohlleiterübergang 9, wobei in deren Endbereich an der Schnittstelle im Hohlleiterendstück 8 eine Filterhälfte 1 gemäß Figur 2 und im Hohlleiterübergang 9 eine Filterhälfte 4 in Konusform gemäß Figur 3 eingeschoben ist.FIG. 6 shows a corresponding representation of the connection of a
Claims (4)
- Arrangement for eliminating disturbing electromagnetic modes in waveguide installations having waveguide sections of the same or different rectangular cross-section, in which there is arranged in the waveguide a planar resistor which forms a mode filter and comprises a plate-shaped metal-coated dielectric support element which extends in the plane in the middle of the broad side over a suitable length in the axial direction relative to the waveguide, characterised in that the mode filter is subdivided into two filter halves of which one each is inserted in a flush, sealing fashion in the respective end region of two waveguide sections to be connected to one another, and in which the filter halves are held only by narrow lateral webs made from foamed plastic and bearing against the internal wall of the waveguides.
- Arrangement according to Claim 1, characterised in that the mode filters or filter halves comprise an attenuation plate of small thickness (0.05 to 2 mm) made from a dielectric substrate, preferably from glass fibre-reinforced epoxy resin having a vapour-deposited metal layer, whose surface resistance is preferably between 100 and 600 Ω.
- Arrangement according to Claim 1 or 2, characterised in that with regard to the shape of the attenuation plate the mode filters or filter halves are constructed rectangularly or with a conical curve in accordance with the longitudinal waveguide section.
- Arrangement according to one of Claims 1 to 3, characterised by its use in a waveguide which operates in transmission bands above its unambiguity limit in a low-loss frequency range (overmoded) and has at its ends waveguide transitions for connection to waveguides having cross-sectional dimensions for which the electromagnetic wave to be transmitted is in the unambiguity range.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3732678 | 1987-09-28 | ||
| DE3732678 | 1987-09-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0309850A2 EP0309850A2 (en) | 1989-04-05 |
| EP0309850A3 EP0309850A3 (en) | 1990-04-25 |
| EP0309850B1 true EP0309850B1 (en) | 1993-08-11 |
Family
ID=6337071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88115332A Expired - Lifetime EP0309850B1 (en) | 1987-09-28 | 1988-09-19 | Spurious electromagnetic-mode suppression arrangement in a waveguide installation |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0309850B1 (en) |
| DE (1) | DE3883127D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7893789B2 (en) | 2006-12-12 | 2011-02-22 | Andrew Llc | Waveguide transitions and method of forming components |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5848096A (en) * | 1995-06-02 | 1996-12-18 | Industrial Research Limited | A damped element |
| DE19739589A1 (en) * | 1997-09-10 | 1999-03-11 | Alsthom Cge Alcatel | Mode filter for connecting two electromagnetic waveguides |
| DE102007042342A1 (en) * | 2007-09-06 | 2009-04-09 | Becker Technologies Gmbh | Shielding device for electromagnetic radiation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760171A (en) * | 1951-04-20 | 1956-08-21 | Bell Telephone Labor Inc | Wave-guide mode filter |
| US2981906A (en) * | 1957-10-14 | 1961-04-25 | Bell Telephone Labor Inc | Resistance sheet microwave device |
| US3088082A (en) * | 1959-10-05 | 1963-04-30 | Philco Corp | Bandpass waveguide filter having iris and posts for resonating fundamental and vanes for absorbing harmonics |
| US4344053A (en) * | 1981-02-12 | 1982-08-10 | Litton Systems, Inc. | Mode suppressor for circular waveguides utilizing a plurality of resistance cards |
-
1988
- 1988-09-19 DE DE8888115332T patent/DE3883127D1/en not_active Expired - Fee Related
- 1988-09-19 EP EP88115332A patent/EP0309850B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7893789B2 (en) | 2006-12-12 | 2011-02-22 | Andrew Llc | Waveguide transitions and method of forming components |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3883127D1 (en) | 1993-09-16 |
| EP0309850A2 (en) | 1989-04-05 |
| EP0309850A3 (en) | 1990-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE4407251C2 (en) | Dielectric waveguide | |
| DE1002828B (en) | Directional coupler in the microwave range for asymmetrical ribbon cables | |
| EP0721697A1 (en) | Dwarf waves mixer realized by windowing | |
| DE3241890C2 (en) | ||
| DE3129425A1 (en) | MICROWAVE ANTENNA FOR CIRCULAR POLARISATION | |
| EP0309850B1 (en) | Spurious electromagnetic-mode suppression arrangement in a waveguide installation | |
| DE2708306C2 (en) | Crossover | |
| DE3634772C2 (en) | ||
| EP2045869A1 (en) | Directional coupler | |
| DE10010936B4 (en) | antenna | |
| EP1178560A1 (en) | Device for connecting two identical electromagnetic waveguides | |
| EP2052434B1 (en) | Directional coupler | |
| WO2001097330A1 (en) | Planar antenna with wave guide configuration | |
| DE3241889C2 (en) | ||
| DE2737125C2 (en) | Transmission system | |
| DE3439414A1 (en) | ANTENNA EXTENSION FOR AT LEAST TWO DIFFERENT FREQUENCY BANDS | |
| DE1240957B (en) | Waveguide system for transmitting a microwave signal of a predetermined frequency with a metallic rectangular waveguide which is dimensioned such that it can transmit the signal in a plurality of modes | |
| EP0285879B1 (en) | Broad-band polarizing junction | |
| WO1997035355A1 (en) | Planar emitter | |
| DE3439413A1 (en) | ANTENNA EXTENSION FOR AT LEAST TWO DIFFERENT FREQUENCY BANDS | |
| DE1186917B (en) | Phase shifter for microwaves | |
| DE3843259C1 (en) | ||
| DE69313169T2 (en) | Antenna arrangement | |
| DE19739589A1 (en) | Mode filter for connecting two electromagnetic waveguides | |
| DE3130209C2 (en) | Cable for the transmission of electromagnetic energy in the microwave range |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): CH DE FR GB IT LI NL |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): CH DE FR GB IT LI NL |
|
| 17P | Request for examination filed |
Effective date: 19900919 |
|
| 17Q | First examination report despatched |
Effective date: 19930127 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR GB IT LI NL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19930811 |
|
| REF | Corresponds to: |
Ref document number: 3883127 Country of ref document: DE Date of ref document: 19930916 |
|
| ITF | It: translation for a ep patent filed |
Owner name: STUDIO JAUMANN |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19931021 |
|
| EN | Fr: translation not filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19940815 Year of fee payment: 7 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19950919 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19950919 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19960916 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19961118 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19961216 Year of fee payment: 9 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970930 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980401 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19980401 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980603 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050919 |