EP0862198A2 - A plate-type magnetron - Google Patents
A plate-type magnetron Download PDFInfo
- Publication number
- EP0862198A2 EP0862198A2 EP98301106A EP98301106A EP0862198A2 EP 0862198 A2 EP0862198 A2 EP 0862198A2 EP 98301106 A EP98301106 A EP 98301106A EP 98301106 A EP98301106 A EP 98301106A EP 0862198 A2 EP0862198 A2 EP 0862198A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- interaction space
- magnetic
- pair
- cathode
- magnetic field
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
- H01J25/60—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that prevents any electron from moving completely around the cathode or guide electrode; Linear magnetrons
Definitions
- the present invention relates to a plate-type magnetron applied to high-frequency heating devices such as microwave ovens etc., in particular, relating to a multi-purpose plate-type magnetron which efficiently provides microwaves having a desired power and frequency.
- a magnetron is a crossed-field device in which magnetic fields and electric fields are produced orthogonally to each other in the interaction space of an electron tube, and the oscillation modes are of two types, namely, the A-type oscillation and the B-type oscillation.
- ⁇ is the mass of electron and e is the charge of an electron, hence the constant ⁇ is theoretically 10,650, but empirically, has a value from 10,000 to 13,000.
- Fig.1 is a diagram showing a conventional cylinder type magnetron configuration.
- a cylindrical anode 21 has a plurality of vanes 22 extending radially toward its center, forming cavity resonators.
- a cathode 23 is provided on the central axis of the cylindrical anode thus defining the interaction space between cathode 23 and vanes 22.
- anode 21 Provided on the top and bottom ends of anode 21 are pole pieces 24, each being attached in close contact with a magnet 26 having a yoke 25.
- a magnet 26 having a yoke 25.
- radiating plates 27 Provided between anode 21 and yoke 25 are radiating plates 27 for releasing heat generated by anode dissipation. This anode dissipation will arise when the electrons emitted from cathode 23 and accelerated by the anode voltage collide with anode 21.
- a pair of electrodes (end hats) 30 are provided across, or at right angles with the direction of the magnetic field, sandwiching this interaction space.
- a negative voltage is applied to these end hats 30, so that the electrons are confined within the interaction space.
- a thermionic cathode is predominantly used at present.
- a thermionic cathode is a cathode in which thermionic emission provides the source of electrons.
- Thermionic emission is the mechanism for emitting electrons over the potential barrier at the material surface by heating the material up to a temperature from 1500 to 2500°K so as to impart energy equal to or greater than the work function of the material to the free electrons in the conduction band.
- Thermionic cathode is formed of a pure metal, or a metallic oxide, etc., but currently, a sintered type which is obtained by mixing a Ba compound (5BaO ⁇ 2Al 2 O 3 ⁇ CaO etc.) and a W powder and press-sintering the mixture, an impregnation type which is obtained by impregnating Ba compound in a molten state into porous W, are mainly used. Either of these has a high emission density of electrons and additionally has advantages that gases are emitted less during evacuation and it can be reactivated if it is exposed to the air because of the effect of barium aluminates used.
- a cold cathode is a cathode which emits electrons based on field emission, instead of thermionic emission.
- Field emission is a method of electron emission wherein a high electric field is applied at and in proximity to the material surface to lower the potential barrier at the surface so as to emit electrons, using the tunnel effect.
- This cathode is called a cold cathode since it does not need to be heated, unlike the thermionic cathode.
- the current-voltage characteristics can be approximated by the Fowler-Nodeheim formula.
- Fig.2 shows a sectional view of the configuration of a cold cathode.
- Emitter portions 90 made up of a metal or semiconductor such as Si etc.
- the cold cathode has advantages over the thermionic cathode in that the operating temperature is lower than that of the thermionic cathode and a high current density can be obtained by providing them in an arrayed form.
- Figs.3 and 4 are sectional and perspective views respectively, showing a plate-type magnetron employing a cold cathode.
- a plate-type anode 41 shown in Fig.3 has a number of vanes 42 which are provided on and perpendicularly to a cathode 43 and a sole portion 51, defining cavity resonators.
- sole portion 51 is at equi-potential with cathode 43, but indicates the portion which will not contribute to emission of electrons unlike the cathode 43.
- Cathode 43 is arranged in the lower left portion of anode 41.
- the space between anode 41 and sole 51-vanes 42 forms an interaction space.
- a pole piece for forming a uniform magnetic field in the interaction space is attached to the magnet of the yoke, on either side of anode 41. This yoke has radiating plates 47 for releasing heat generated due to anode dissipation.
- the thus emitted electrons travels under the influence of the magnetic field from magnets 46 towards the right in Fig.2, in the interaction space, following a cycloidal path in a similar manner as in a cylindrical magnetron. During travel these electrons give up energy to the cavity resonators, generating high-frequency electric fields, which are output as microwaves through a microwave output portion 49.
- ⁇ -mode In the case of a magnetron using anode segments, it is possible to cause various modes of operation depending upon the number of the segments.
- the mode mainly used in the B-type oscillation called ⁇ -mode, in which the phase difference between successive resonators is ⁇ radian and the interaction therebetween is the strongest.
- magnetrons have extremely useful characteristics, i.e., very high oscillation efficiency, high power and low cost, there is a demand that magnetrons be applied to a variety of technical fields other than microwave ovens. Accordingly, there has been an important theme of how a multi-purpose magnetron can be realized which can be applied to these broadened fields, such as commutations, radar, electronic devices etc.
- the present invention is configured as follows:
- a plate-type magnetron comprises:
- the second aspect of the invention resides in the plate-type magnetron having the above first feature, wherein the magnetic portion comprises: a pair of pole pieces arranged facing each other on both sides of the interaction space; and a pair of magnets which each are attached to the pole piece and are set in close contact with the yoke to form a magnetic coupling, wherein the magnets are adapted to move.
- the third aspect of the invention resides in the plate-type magnetron having the above first feature, wherein the magnetic portion comprises: a pair of pole pieces arranged facing each other on both sides of the interaction space; and a pair of magnets which each are attached to the pole piece and are set in close contact with the yoke to form a magnetic coupling, and the pole pieces can be varied in length.
- the fourth aspect of the invention resides in the plate-type magnetron having the above first feature, wherein the magnetic portion comprises: a pair of pole pieces arranged facing each other on both sides of the interaction space; and a pair of magnets which each are attached to the pole piece and are set in close contact with the yoke to form a magnetic coupling, and the yoke can be varied in length.
- a plate-type magnetron includes:
- the output power can be varied in accordance with change in the potential of the electrodes while the frequency can be varied in accordance with the distance between the magnets. Further, when a positive voltage is applied to the electrodes, it is possible to remove the electrons, which can disturb the oscillation, from the interaction space.
- Fig.5 is a sectional view showing a plate-type magnetron in accordance with the present invention. As shown in Fig.5, this plate-type magnetron is composed of an anode 11, vanes 12, a cathode 13, pole pieces 14, a yoke 15, magnets 16 and end hats 20.
- a pair of electrodes or end hats 20 facing each other, to which positive and negative potentials are applied.
- a pair of pole pieces 14 for generating a required magnetic field in interaction space 18 are arranged facing each other, on the outer sides of end hats 20.
- a pair of magnets 16 are provided on the outer sides of pole pieces 14. Magnets 16 have a yoke 15, which is disposed in contact with anode 11.
- the elements which contribute to forming the magnetic field in interaction space 18 are magnets 16, pole pieces 14 and yoke 15, which are magnetically coupled with one another. These elements are called, as a whole, a magnetic portion.
- magnets 16 are of a ferrite type and are affixed to the side walls of the housing. Since yoke 15 also serves as a radiating plate for releasing heat generated from anode dissipation, it is made of a galvanized iron material.
- the gap of the magnetic portion (the gap-distance in the magnetic portion) affecting the magnetic field strength in interaction space 18 can be varied by providing pole pieces 14 and yoke 15 in the form of bellows so that a variation of 20 mm in the gap-distance in the magnetic portion can be achieved. Magnets 16 can also be moved with the change in this distance.
- Anode 11 is one which is produced by the fabrication method of a plate-type magnetron anode disclosed in Japanese Patent Application Laid-Open Hei 8 No.315,742.
- the gap-distance in the magnetic portion is set as desired by operating the bellows of pole pieces 14 and yoke 15 so that a desired magnetic field is formed in interaction space 18.
- a voltage is applied in a similar manner as described for the conventional magnetron with reference to Fig.3
- electrons are emitted from cathode 13 and travel in interaction space 18 under the influence of this magnetic field, following a cycloidal path.
- these electrons give up energy to the cavity resonators, generating high-frequency electric fields. Accordingly, microwaves having a frequency and output power associated with the distance between the magnets or the adjusted amount of pole pieces 14 and yoke 15 will be extracted.
- a positive or negative voltage can be selectively applied to end hats 20, and magnets 16 are adapted to move and so the yoke length and the pole-piece length can be varied so as to provide microwaves having a desired output power and frequency.
- this plate-type magnetron is constructed such that the electrons which will disturb the oscillation are removed from the interaction space by the application of a positive voltage to end hats 20 and this voltage is changed so as to control the output power.
- Magnets 16 are adapted to be movable and bellows-like pole pieces 14 and yoke 15 are adjusted to change the yoke length and the pole piece length, whereby the gap-distance in the magnetic portion is altered, thus controlling the frequency.
- the anode voltage is set at 100 V
- the magnetic field strength set at 1,360 Gauss the distance between the magnets set at 30 mm
- the end hats set a voltage of -10V
- an emission current of 2.1A flows and an output power of oscillation of 160 W (2.5 GHz) can be obtained.
- microwaves having a frequency of 3.1 to 5.1 GHz with an output power of oscillation of 3 to 7 W can be obtained. Additionally, when a voltage of +10 V is applied to end hats 20, microwaves having a frequency 3.1 to 5.1 GHz with an output power of oscillation of 10 to 20 W, about the three times of the output power under the former conditions, can be produced.
- the magnetic portion can be constructed so as to vary the magnetic field strength generated in the interaction space, it is possible to alter the oscillating frequency by changing the magnetic field strength.
- the magnets, the length of the pole pieces, and the yoke length are adjusted so as to alter the magnetic field strength in accordance with the gap-distance in the magnetic portion, thus making it possible to change the frequency.
Landscapes
- Microwave Tubes (AREA)
Abstract
Description
Claims (13)
- A plate-type magnetron comprising:a cathode for emitting electrons;an anode having a plurality of vanes arranged at regular intervals thereon;a magnetic portion for producing a uniform magnetic field in an interaction space sandwiched between the cathode and the anode; anda pair of electrodes arranged facing each other, perpendicularly to the uniform magnetic field, on both sides of the interaction space,
- The plate-type magnetron according to Claim 1, wherein the magnetic portion comprises: a pair of pole pieces arranged facing each other on both sides of the interaction space; and a pair of magnets which each are attached to the pole piece and are set in close contact with the yoke to form a magnetic coupling, wherein the magnets are adapted to move.
- The plate-type magnetron according to Claim 1, wherein the magnetic portion comprises: a pair of pole pieces arranged facing each other on both sides of the interaction space; and a pair of magnets which each are attached to the pole piece and are set in close contact with the yoke to form a magnetic coupling, and the pole pieces can be varied in length.
- The plate-type magnetron according to Claim 1, wherein the magnetic portion comprises: a pair of pole pieces arranged facing each other on both sides of the interaction space; and a pair of magnets which each are attached to the pole piece and are set in close contact with the yoke to form a magnetic coupling, and the yoke can be varied in length.
- A plate-type magnetron comprising:a cathode for emitting electrons;an anode having a plurality of vanes arranged at regular intervals thereon;a magnetic portion producing a uniform magnetic field in an interaction space sandwiched between the cathode and the anode; anda pair of electrodes arranged facing each other, perpendicularly to the uniform magnetic field, on both sides of the interaction space,
- A magnetron in which the magnetic field strength of a substantially uniform magnetic field, produced in an interaction space formed between a cathode and an anode is variable.
- A magnetron according to claim 6, in the form of a plate-type magnetron in which the interaction space extends longitudinally, wherein there is provided a magnetic portion for producing said magnetic field, said magnetic portion including a pair of pole pieces which face one another laterally across said interaction space with a magnetic gap therebetween, and wherein to provide the variation of the magnetic field strength the magnetic portion is adjustable so as to change the width of said magnetic gap.
- A magnetron according to claim 7 wherein said magnetic portion forms a magnetic circuit which includes said magnetic gap and said pole pieces, and which further includes one or more magnets and a magnetic yoke.
- A magnetron according to any of claims 6 to 8 wherein a portion of said anode facing the cathode is formed with a row of vanes, said row extending along said interaction space.
- A magnetron according to claim 7 or any claim dependent thereon, wherein said cathode includes an electron emitting portion at an end region of said longitudinal interaction space, and an elongate non-emitting sole portion extending longitudinally from said electron emitting portion.
- A magnetron according to any of claims 6 to 10, further including a pair of end hat electrodes spaced apart in a direction transverse to the interaction space and arranged one on each side of said space.
- A magnetron according to claim 11 when dependent on claim 7 or any claim dependent thereon, wherein each said electrode is disposed between a respective one of said pole pieces and the interaction space.
- A magnetron according to claim 11 or claim 12, including means for applying a changeable voltage to said electrodes to vary the magnetron power output.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP46532/97 | 1997-02-28 | ||
JP04653297A JP3333421B2 (en) | 1997-02-28 | 1997-02-28 | Flat magnetron |
JP4653297 | 1997-02-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0862198A2 true EP0862198A2 (en) | 1998-09-02 |
EP0862198A3 EP0862198A3 (en) | 1998-11-11 |
EP0862198B1 EP0862198B1 (en) | 2002-05-08 |
Family
ID=12749909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98301106A Expired - Lifetime EP0862198B1 (en) | 1997-02-28 | 1998-02-16 | A plate-type magnetron |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0862198B1 (en) |
JP (1) | JP3333421B2 (en) |
KR (1) | KR100291396B1 (en) |
CN (1) | CN1147909C (en) |
DE (1) | DE69805238T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006008541A2 (en) * | 2004-07-23 | 2006-01-26 | Stenzel Security Limited | Electronic apparatus |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010009047A (en) * | 1999-07-07 | 2001-02-05 | 김현순 | A Method of incredsing microwave electro-megnetic field intensity in the microwave chamber for dielectric heating |
KR100721218B1 (en) * | 2000-06-07 | 2007-05-22 | 대우전자부품(주) | Separater for Deflection Yoke |
KR20040050264A (en) * | 2002-12-10 | 2004-06-16 | 삼성전자주식회사 | Magnetron, Microwave oven, and High frequency heating apparatus |
JP2013069602A (en) | 2011-09-26 | 2013-04-18 | Tokyo Electron Ltd | Microwave processor and workpiece processing method |
CN103151230B (en) * | 2012-12-11 | 2015-05-13 | 中国人民解放军国防科学技术大学 | Long-pulse high conversion efficiency negative pole used for magnetron |
CN108807116B (en) * | 2018-06-05 | 2021-02-02 | 电子科技大学 | Flattened magnetron for microwave oven adopting asymmetric magnetic circuit |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496500A (en) * | 1945-07-18 | 1950-02-07 | Raytheon Mfg Co | Electron discharge device |
US3109123A (en) * | 1962-03-15 | 1963-10-29 | Raytheon Co | Electron discharge devices with a sharp edged cathode |
US3932820A (en) * | 1973-07-06 | 1976-01-13 | The British Secretary of State for Defense | Crossed field amplifiers |
FR2401509A1 (en) * | 1977-07-01 | 1979-03-23 | Cgr Mev | Variable output power magnetron parameter control - has relay controlled motor driven piston within one cavity and potentiometer controls electro magnet current |
JPH06302428A (en) * | 1993-04-14 | 1994-10-28 | Shin Etsu Chem Co Ltd | Variable magnetic field generation set using permanent magnet |
EP0694948A2 (en) * | 1994-06-28 | 1996-01-31 | SHARP Corporation | Magnetron and microwave oven |
JPH09259777A (en) * | 1996-03-19 | 1997-10-03 | Sharp Corp | Magnetron and driving method therefor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3165342B2 (en) * | 1994-12-05 | 2001-05-14 | シャープ株式会社 | Magnetron |
JP3165343B2 (en) * | 1994-12-07 | 2001-05-14 | シャープ株式会社 | Anode for flat plate magnetron and method of manufacturing the same |
-
1997
- 1997-02-28 JP JP04653297A patent/JP3333421B2/en not_active Expired - Fee Related
-
1998
- 1998-02-16 DE DE69805238T patent/DE69805238T2/en not_active Expired - Fee Related
- 1998-02-16 EP EP98301106A patent/EP0862198B1/en not_active Expired - Lifetime
- 1998-02-20 CN CNB981052681A patent/CN1147909C/en not_active Expired - Fee Related
- 1998-02-26 KR KR1019980006067A patent/KR100291396B1/en not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496500A (en) * | 1945-07-18 | 1950-02-07 | Raytheon Mfg Co | Electron discharge device |
US3109123A (en) * | 1962-03-15 | 1963-10-29 | Raytheon Co | Electron discharge devices with a sharp edged cathode |
US3932820A (en) * | 1973-07-06 | 1976-01-13 | The British Secretary of State for Defense | Crossed field amplifiers |
FR2401509A1 (en) * | 1977-07-01 | 1979-03-23 | Cgr Mev | Variable output power magnetron parameter control - has relay controlled motor driven piston within one cavity and potentiometer controls electro magnet current |
JPH06302428A (en) * | 1993-04-14 | 1994-10-28 | Shin Etsu Chem Co Ltd | Variable magnetic field generation set using permanent magnet |
EP0694948A2 (en) * | 1994-06-28 | 1996-01-31 | SHARP Corporation | Magnetron and microwave oven |
JPH09259777A (en) * | 1996-03-19 | 1997-10-03 | Sharp Corp | Magnetron and driving method therefor |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 095, no. 001, 28 February 1995 -& JP 06 302428 A (SHIN ETSU CHEM CO LTD), 28 October 1994, * |
PATENT ABSTRACTS OF JAPAN vol. 098, no. 002, 30 January 1998 -& JP 09 259777 A (SHARP CORP), 3 October 1997, * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006008541A2 (en) * | 2004-07-23 | 2006-01-26 | Stenzel Security Limited | Electronic apparatus |
WO2006008541A3 (en) * | 2004-07-23 | 2006-06-01 | Stenzel Security Ltd | Electronic apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP0862198A3 (en) | 1998-11-11 |
EP0862198B1 (en) | 2002-05-08 |
JP3333421B2 (en) | 2002-10-15 |
JPH10241585A (en) | 1998-09-11 |
CN1192036A (en) | 1998-09-02 |
DE69805238T2 (en) | 2002-11-07 |
KR100291396B1 (en) | 2001-07-12 |
CN1147909C (en) | 2004-04-28 |
DE69805238D1 (en) | 2002-06-13 |
KR19980071724A (en) | 1998-10-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3432721A (en) | Beam plasma high frequency wave generating system | |
US20070296515A1 (en) | Magnetron | |
US2424886A (en) | Magnetron | |
Kesari et al. | High Power Microwave Tubes: Basics and Trends, Volume 2 | |
JP3390562B2 (en) | Magnetron and microwave oven | |
EP0862198B1 (en) | A plate-type magnetron | |
US3432722A (en) | Electromagnetic wave generating and translating apparatus | |
US5541391A (en) | Microwave oven employing a klyston | |
US4621219A (en) | Electron beam scrambler | |
KR0140461B1 (en) | Microwawe oven | |
US2748277A (en) | Magnetron noise generators | |
US2444242A (en) | Magnetron | |
US2559582A (en) | Microwave generator | |
US2467538A (en) | Electron discharge device | |
US3292033A (en) | Ultra-high-frequency backward wave oscillator-klystron type amplifier tube | |
US3240983A (en) | High frequency apparatus | |
CA1222563A (en) | Emitron: microwave diode | |
US3305753A (en) | Magnetron having magnetic bias of such strength as to make cyclotron frequency equal to twice pi frequency, useful for cold cathode operation | |
JPS59114730A (en) | Gyrotron oscillator of multibore cavity for reducing mode bycompetition | |
US2951173A (en) | Traveling wave tube oscillators | |
US4035688A (en) | Electronic tunable microwave device | |
KR200162643Y1 (en) | Magnetron | |
US2630549A (en) | High-voltage generator | |
US2878412A (en) | Travelling wave oscillator | |
JPS6134219B2 (en) |
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): DE FR GB |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 19990112 |
|
AKX | Designation fees paid |
Free format text: DE FR GB |
|
17Q | First examination report despatched |
Effective date: 20010309 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
REF | Corresponds to: |
Ref document number: 69805238 Country of ref document: DE Date of ref document: 20020613 |
|
ET | Fr: translation 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 |
Effective date: 20030211 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070208 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20070214 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20070208 Year of fee payment: 10 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20080216 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20081031 |
|
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: 20080902 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080216 |