WO2004023113A1 - Gas sensors - Google Patents
Gas sensors Download PDFInfo
- Publication number
- WO2004023113A1 WO2004023113A1 PCT/GB2003/003782 GB0303782W WO2004023113A1 WO 2004023113 A1 WO2004023113 A1 WO 2004023113A1 GB 0303782 W GB0303782 W GB 0303782W WO 2004023113 A1 WO2004023113 A1 WO 2004023113A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- sensor
- gas sensor
- source
- detector
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 description 17
- 239000007787 solid Substances 0.000 description 3
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000544 Gore-Tex Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/004—CO or CO2
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N2021/0385—Diffusing membrane; Semipermeable membrane
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/022—Casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/121—Correction signals
- G01N2201/1211—Correction signals for temperature
Definitions
- This invention relates to apparatus for, and methods of, sensing gasses .
- the invention particularly relates to such methods and devices in which optical radiation is transmitted through a gas and subsequently detected to provide information concerning the gas .
- an infrared source is arranged to emit radiation, which passes through a gas to be monitored. Infrared radiation is absorbed by the gas and that remaining is subsequently detected by an infrared detector. A comparison is made between the source intensity and the intensity of radiation detected following passage through the gas to give the concentration of a target gas .
- the present invention seeks to provide a gas sensing device, which although manufactured economically from a minimal number of inexpensive components, performs its function as well as more sophisticated sensors.
- the invention provides a gas sensor comprising an optical source and detector means sensitive to light from the source, the source and detector being electrically connected to a circuit board which forms part of a housing for the source and detector, and the sensor further comprising means arranged, in use, to admit gas into the housing.
- the means for admitting gas into the housing comprises apertures in the housing, which apertures may be formed in the circuit board.
- part of the housing may comprise sintered material to admit gas to the sensor.
- the gas sensor further includes a temperature sensor arranged to detect temperature inside the housing.
- the output from the temperature sensor may be input to a control system arranged to provide a signal to compensate for changes in the sensor output with ambient temperature .
- the invention lends itself to the monitoring of carbon dioxide levels at and above critical and is therefore suitable for the detection of the presence of humans or animals in an enclosed environment . Therefore, the invention may be employed in a variety of security and rescue applications .
- Figure 1 is a sectional view of a gas sensor constructed according to
- Figure 2 is a sectional view of an alternative gas sensor constructed
- FIG. 3 is a sectional view of another alternative gas sensor constructed according to the invention.
- Figure 4 is a sectional view of a further alternative gas sensor constructed according to the invention
- Figure 5 is a sectional view of a further alternative gas sensor constructed according to the invention
- Figure 6 is a sectional view of a further alternative gas sensor constructed according to the invention.
- Figures 7a and 7b are cross sectional views of channels suitable for inclusion in the sensor of Figure 6.
- the gas sensor 1 comprises a source 2 of infrared (IR) radiation, electrically connected to, and physically mounted on, a printed circuit board (PCB) 3.
- the sensor 1 further comprises an infrared detector 4, which includes a bandpass filter.
- the detector 4 is also electrically connected to, and physically mounted on, the PCB 3. Suitable detectors include photodiodes, thermopiles and pyroelectric devices .
- a cover 5 is provided for the source 2 and detector 4.
- the cover 5, together with the PCB 3 forms a housing 6 for the components of the sensor 1.
- the interior surfaces of the housing 6 form an optical cavity.
- the interior surfaces of the cover are coated with a metallic layer, for example gold. Any material that is highly reflective to IR radiation may be employed.
- the surface of the PCB onto which the components are mounted may also be coated with IR reflective material .
- the cover 5 has a tapered wall 7 with a curved end portion 8 arranged so that, in the sectional view of Figure 1, the cover 5 resembles the shape of a thimble.
- at least a portion of the cover 5 comprises a sinter, to allow gas to be admitted into the housing 6 by diffusion.
- the source 2 produces broadband IR radiation, which is reflected by the surfaces of the cavity and absorbed by the gas in the housing to a degree proportional to the amount of gas present.
- a range of wavelengths of the broadband IR radiation not absorbed by the gas is detected at the detector 4.
- the detector 4 generates an electrical signal corresponding to the strength of the detected IR radiation. This signal is input to processing electronics (not shown) arranged to ) determine the concentration of gas present in the housing.
- the concentration is related to the intensity by the following equation:
- I is the intensity of radiation detected by the detector
- 10 is the intensity of radiation emitted at the source
- e is effectively a constant which is dependent on the particular gas being monitored
- c is the gas concentration
- I is the distance travelled by the radiation through the gas.
- the sensor and processing electronics may be configured to detect an increase or decrease ( ⁇ c) in concentration of the gas being sensed. Alternatively, absolute measurements of the concentration of a particular gas may be determined.
- the cover 9 comprises a solid shell of pressed metal . Gas is able to diffuse into the housing by means of apertures 10 in the PCB.
- the cover 11 is square or rectangular in section.
- This cover 11 includes porous material, for example a sinter, for the admittance of gas.
- the cover 11 could comprise a solid shell of pressed metal, in which case the PCB of would incorporate apertures for the gas .
- the cover 12 comprises a straight cylindrical wall 13 having a dome 14 as a lid.
- the wall 13 and dome 14 may be of one-piece construction.
- This sensor includes an apertured PCB for the admittance of gas .
- the cover of the Figure 4 embodiment is less simple to manufacture than the basic cubic shape of the cover of the Figure 3 embodiment. However, the domed lid ensures that a greater proportion of light is directed onto the detector.
- the cover 15 comprises a pipe 16, one end portion 17 of which is arranged to surround the source 2 of IR radiation.
- the other end portion 18 of the pipe is arranged to surround the detector 4.
- the pipe 16 forms an inverted "U" over the PCB.
- the pipe 16 may comprise a sinter or else have a plurality of apertures (not shown) in its walls.
- An advantage of this embodiment is that the pipe provides a predefined optical path for radiation traveling from the source to the detector. Thus, stray light is minimised.
- the inverted "U" shape of the pipe provides a relatively long optical path as well as providing a large surface area for gas to diffuse into the cover.
- the source 2 and detector 4 are spaced apart.
- the cover 19 comprises a solid metallic shell arranged to provide an elongated channel between the source 2 and the detector4. In this embodiment, diffusion of gas into the housing is effected by means of apertures in the PCB .
- the cover 19 of Figure 6 may be square or rectangular in cross section, as illustrated in Figure 7a. Alternatively, the cover may have a curved upper surface so that it is arch- shaped in cross section as shown in Figure 7b. Of course, the cover could take on any shape required, for example domed, pyramidal, etc, in order to enhance the proportion of radiation incident on the detector.
- the gas admittance means could comprise apertures in the PCB, apertures in the cover, a sinter forming part of the cover or any combination of these.
- a reflector may be located adjacent the source of IR radiation and arranged to reflect light in a desired direction or range of directions .
- a replaceable particle filter for example a microporous membrane of Gore-Tex ® , may be provided over the gas sensor in order to prevent dirt particles, water droplets and other contaminants from entering the sensor.
- a temperature sensor in the form of a thermistor, for example, may be incorporated in the sensor to provide a signal representing the temperature in the sensor to a control system, which employs suitable algorithms to provide temperature compensation of the output signal from the detector.
- the invention is particularly suitable for detecting levels of carbon dioxide in an environment. Alternatively, an increase in concentration of carbon dioxide levels may be detected.
- the gas sensor constructed according to the invention typically has an optical path length in the range of forty to sixty millimetres approximately. It has been found that this is suitable for detecting levels of carbon dioxide in the range of 500 ppm to 10,000 ppm.
- the IR source and detector may be tuned to the absorption band of carbon dioxide at 4.2 microns.
- a gas sensor configured to detect carbon dioxide is suitable for a wide range of applications as such a sensor can detect the presence of humans or animals in an environment .
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003260767A AU2003260767A1 (en) | 2002-09-03 | 2003-09-02 | Gas sensors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0220351A GB2392721A (en) | 2002-09-03 | 2002-09-03 | Gas sensors |
GB0220351.1 | 2002-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004023113A1 true WO2004023113A1 (en) | 2004-03-18 |
Family
ID=9943342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2003/003782 WO2004023113A1 (en) | 2002-09-03 | 2003-09-02 | Gas sensors |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003260767A1 (en) |
GB (1) | GB2392721A (en) |
WO (1) | WO2004023113A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005054827A1 (en) * | 2003-12-02 | 2005-06-16 | City Technology Limited | Gas sensor |
WO2005062024A1 (en) * | 2003-12-20 | 2005-07-07 | Robert Bosch Gmbh | Gas sensor |
EP2163208A2 (en) | 2008-07-11 | 2010-03-17 | Olympus Medical Systems Corp. | Tissue fastener |
DE102009036114B3 (en) * | 2009-08-05 | 2010-09-02 | Dräger Safety AG & Co. KGaA | Infrared-optical gas measurement device for use in warning- and alarm system for monitoring concentration of e.g. explosive gas in industry, has split washers or perforated disks arranged in region of gas inlet opening |
JP2014016268A (en) * | 2012-07-10 | 2014-01-30 | Asahi Kasei Electronics Co Ltd | Gas sensor |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10144873A1 (en) * | 2001-09-12 | 2003-03-27 | Bosch Gmbh Robert | Micromechanical heat conductivity sensor used for analyzing gas mixtures containing hydrogen and/or helium has a thermally insulating membrane covered on one or both of its sides by a porous covering plate which permits gas diffusion |
US7244939B2 (en) | 2003-12-09 | 2007-07-17 | Dynament Limited | Gas sensor |
GB2401432B (en) * | 2003-12-09 | 2005-05-04 | Dynament Ltd | Gas sensor |
SE534082C2 (en) * | 2004-12-29 | 2011-04-26 | Senseair Ab | A gas detecting arrangement |
DE102005018470A1 (en) * | 2005-04-21 | 2006-10-26 | Robert Bosch Gmbh | Optical gas sensor |
US7214939B1 (en) * | 2005-11-21 | 2007-05-08 | Airware, Inc. | Ultra low power NDIR carbon dioxide sensor fire detector |
DE102007006155A1 (en) * | 2007-02-07 | 2008-08-14 | Tyco Electronics Raychem Gmbh | Substrate with integrated filter for gas sensor arrangements |
GB0705356D0 (en) | 2007-03-21 | 2007-04-25 | Alphasense Ltd | Optical absorption gas sensor |
JP2009092545A (en) | 2007-10-10 | 2009-04-30 | Panasonic Corp | Composite sensor for detecting angular velocity and acceleration |
SE534685C2 (en) * | 2008-12-12 | 2011-11-15 | Senseair Ab | Gas sensor arrangement for circuit boards |
SE535267C2 (en) * | 2009-10-26 | 2012-06-12 | Senseair Ab | A measurement cell adapted to a spectral analysis |
GB2509042A (en) * | 2011-07-20 | 2014-06-18 | Logico2 Online Sarl | Device and system for gas leakage detection and alarm |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4709150A (en) * | 1986-03-18 | 1987-11-24 | Burough Irvin G | Method and apparatus for detecting gas |
US5053754A (en) * | 1990-04-02 | 1991-10-01 | Gaztech Corporation | Simple fire detector |
GB2262338A (en) * | 1991-07-02 | 1993-06-16 | Stephen William Goom | Infra red gas detector |
US6067840A (en) * | 1997-08-04 | 2000-05-30 | Texas Instruments Incorporated | Method and apparatus for infrared sensing of gas |
US6201245B1 (en) * | 1998-06-18 | 2001-03-13 | Robert J. Schrader | Infrared, multiple gas analyzer and methods for gas analysis |
WO2002004926A2 (en) * | 2000-07-11 | 2002-01-17 | Edwards Systems Technology, Inc. | A diffusion-type ndir gas analyzer with fast response time due to convection flow |
US20020104967A1 (en) * | 2001-02-06 | 2002-08-08 | Spx Corporation | Gas sensor based on energy absorption |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0619327B2 (en) * | 1988-03-10 | 1994-03-16 | 三洋電機株式会社 | Infrared gas concentration meter |
US5596314A (en) * | 1994-08-01 | 1997-01-21 | Quantum Group, Inc. | Enclosure for a gas detector system |
DE19645321A1 (en) * | 1996-11-04 | 1998-05-07 | Gerhard Prof Dr Wiegleb | Gas sensor arrangement |
GB2358245A (en) * | 1999-10-21 | 2001-07-18 | Pittway Corp | Photo-acoustic gas sensor |
-
2002
- 2002-09-03 GB GB0220351A patent/GB2392721A/en not_active Withdrawn
-
2003
- 2003-09-02 AU AU2003260767A patent/AU2003260767A1/en not_active Abandoned
- 2003-09-02 WO PCT/GB2003/003782 patent/WO2004023113A1/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4709150A (en) * | 1986-03-18 | 1987-11-24 | Burough Irvin G | Method and apparatus for detecting gas |
US5053754A (en) * | 1990-04-02 | 1991-10-01 | Gaztech Corporation | Simple fire detector |
GB2262338A (en) * | 1991-07-02 | 1993-06-16 | Stephen William Goom | Infra red gas detector |
US6067840A (en) * | 1997-08-04 | 2000-05-30 | Texas Instruments Incorporated | Method and apparatus for infrared sensing of gas |
US6201245B1 (en) * | 1998-06-18 | 2001-03-13 | Robert J. Schrader | Infrared, multiple gas analyzer and methods for gas analysis |
WO2002004926A2 (en) * | 2000-07-11 | 2002-01-17 | Edwards Systems Technology, Inc. | A diffusion-type ndir gas analyzer with fast response time due to convection flow |
US20020104967A1 (en) * | 2001-02-06 | 2002-08-08 | Spx Corporation | Gas sensor based on energy absorption |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005054827A1 (en) * | 2003-12-02 | 2005-06-16 | City Technology Limited | Gas sensor |
US7541587B2 (en) | 2003-12-02 | 2009-06-02 | City Technology Limited | Gas sensor |
WO2005062024A1 (en) * | 2003-12-20 | 2005-07-07 | Robert Bosch Gmbh | Gas sensor |
US7880886B2 (en) | 2003-12-20 | 2011-02-01 | Robert Bosch Gmbh | Gas sensor |
EP2163208A2 (en) | 2008-07-11 | 2010-03-17 | Olympus Medical Systems Corp. | Tissue fastener |
DE102009036114B3 (en) * | 2009-08-05 | 2010-09-02 | Dräger Safety AG & Co. KGaA | Infrared-optical gas measurement device for use in warning- and alarm system for monitoring concentration of e.g. explosive gas in industry, has split washers or perforated disks arranged in region of gas inlet opening |
JP2014016268A (en) * | 2012-07-10 | 2014-01-30 | Asahi Kasei Electronics Co Ltd | Gas sensor |
Also Published As
Publication number | Publication date |
---|---|
GB2392721A (en) | 2004-03-10 |
AU2003260767A1 (en) | 2004-03-29 |
GB0220351D0 (en) | 2002-10-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2004023113A1 (en) | Gas sensors | |
US5721430A (en) | Passive and active infrared analysis gas sensors and applicable multichannel detector assembles | |
US5650624A (en) | Passive infrared analysis gas sensor | |
US7507967B2 (en) | Infrared gas detector | |
US10168211B1 (en) | Fully integrated gas concentration sensor | |
US7420171B2 (en) | Gas sensors | |
JP2005233958A (en) | Gas sensor structure | |
EP1111367A2 (en) | Photoacoustic device and process for multi-gas sensing | |
US6989549B2 (en) | Optical gas sensor | |
JP3973762B2 (en) | Alarm system | |
US20020105650A1 (en) | Gas sensor | |
US6642522B2 (en) | Optical gas sensor | |
CN107851355B (en) | Scattered-light smoke alarm with an optical measuring chamber in the alarm housing and a mirror surface which is part of the housing on the inside of the alarm cover | |
GB2395259A (en) | Gas sensor with predetermined optical paths between its different detectors | |
US5936250A (en) | Ultraviolet toxic gas point detector | |
CN110892460B (en) | Chamber-less smoke detector with indoor air quality detection and monitoring | |
CN110887806B (en) | Filtering-free sheet type infrared heat radiation gas concentration sensor based on metamaterial | |
US20020153490A1 (en) | Concentration detection system | |
JP6565932B2 (en) | Optical detector | |
JP2006275641A (en) | Spectroscopic gas sensor | |
GB2401679A (en) | Infrared gas detector | |
JPH08184557A (en) | Optical gas detector | |
JP4255420B2 (en) | Flame detector | |
MXPA98005660A (en) | Gas sensors by passive and active infrared analysis and assemblies multiple channel detectors aplicab | |
WO2005015176A1 (en) | Gas detector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |