WO2008125770A1 - Procede de detection d'une contamination fongique - Google Patents
Procede de detection d'une contamination fongique Download PDFInfo
- Publication number
- WO2008125770A1 WO2008125770A1 PCT/FR2008/050366 FR2008050366W WO2008125770A1 WO 2008125770 A1 WO2008125770 A1 WO 2008125770A1 FR 2008050366 W FR2008050366 W FR 2008050366W WO 2008125770 A1 WO2008125770 A1 WO 2008125770A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vocs
- fungal
- absence
- detecting
- methyl
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
- C12Q1/04—Determining presence or kind of microorganism; Use of selective media for testing antibiotics or bacteriocides; Compositions containing a chemical indicator therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/37—Assays involving biological materials from specific organisms or of a specific nature from fungi
Definitions
- the present invention relates to a method for detecting fungal contamination in indoor environments.
- Indoor environment refers to a confined space within a building that is aerated in a non-continuous manner. Examples of indoor environments can be found in dwellings, museums, churches, cellars, historic monuments, administrative buildings, schools and hospitals.
- the techniques used to detect the presence of mold in indoor environments rely on visual recognition of fungal growth and culture of conidia taken from the air or surfaces.
- the presence of these microorganisms may be difficult to diagnose in the case of "masked" contamination for which the spores are not emitted into the environment (when the contaminations are at the level of the ventilation system or in the structures building for example).
- the molds Invisible then on the surface of building products, and undetectable by the microbiological analysis of the air, the molds nevertheless produce, continuously, inhalable metabolites and degradation products and responsible in some cases of diseases.
- An object of the present invention is therefore to overcome all or part of the disadvantages mentioned above.
- the fungi emit from the beginning of their development volatile molecules (Volatile Organic Compounds) resulting either from their metabolism, or from the degradation of the material on which they develop by the enzymes or acids they occur. Unlike spores, these compounds disperse into the environment without being retained by the supports. Therefore the detection of some of these compounds which are specific for one or more fungal species, allows on the one hand the identification of a contamination from the beginning of the development of fungi and on the other hand the detection of contaminations " in which the spores are not released into the environment.
- volatile molecules Volatile Organic Compounds
- VOCs are present in the ambient air only in the presence of mold. These VOCs are therefore specifically derived from fungal metabolism.
- the Applicant Company has also found that certain other VOCs are present in the ambient air not only in the presence of mold, but also in the presence of certain construction materials or other biological contaminations such as bacterial contaminations.
- An example of such bacterial contamination is geosmin, which is emitted by both mold and bacteria.
- VOCs specifically derived from fungal metabolism can be divided into two groups: the VOCs that are emitted independently of the fungal species and the support on which the fungal species develops , and the VOCs that are emitted depending on the fungal species and / or the medium on which it develops.
- VOCs that are emitted independently of the fungal species and its carrier
- VOCs that are emitted only by fungal species and VOCs that may have other biological origins. She thus determined three distinct categories of fungal VOCs. The detection of these VOCs is the basis of the invention. As a result, the Applicant Company has had the merit, after extensive and extensive research, to develop a method for detecting fungal contamination in indoor environments that allows for the detection of such fungal contamination even in soil. absence of visible signs of contamination.
- the method for detecting a fungal contamination of an indoor environment comprises the following steps: a. sampling of volatile organic compounds (VOCs) in an indoor environment, b. detecting the presence or absence of certain predetermined VOCs derived from fungal metabolism, these predetermined VOCs comprising at least one VOC of each of the following three VOC categories:
- VOCs that are emitted independently of the fungal species and their carrier and that are only released by fungal species
- VOCs that are emitted independently of the fungal species and carrier, but may also have other biological origins
- VOCs that are emitted based on the fungal species and / or carrier; vs. calculation of a chemical index of fungal contamination as a function respectively of the presence and absence of predefined VOCs, resulting from fungal metabolism.
- VOCs that are only emitted by fungal species and whose emission is independent of the support include 1-octen-3-ol, 1,3-octadiene and methyl-2-ethylhexanoate.
- VOCs that can also have other biological origins whose emission is independent of the carrier include 2-methylfuran, 3-methylfuran, 3-methyl-1-butanol, 2-methyl-1-butanol and ⁇ -pinene.
- VOCs that are emitted depending on the fungal species and / or carrier include 2-heptene, dimethylsulfide, 4-heptanone, 2 (5H) -furanone, 3-heptanol and methoxybenzene.
- the predetermined VOCs include, in addition to the VOCs of categories (1), (2), (3) also 2-ethylhexanol.
- step a) of sampling the VOC sample is preferably carried out by diffusion sampling on a solid carbograph type adsorbent 4.
- predetermined VOCs include at least
- VOC that is emitted independently of the fungal species and its carrier and is only released by fungal species
- VOC that is emitted independently of the fungal species and carrier, but which may also have other biological origins
- the certainty of the detection method according to the invention is increased with respect to detection of the presence or absence VOCs from only one of these categories.
- VOCs Preferably, several VOCs will be detected from each of the three categories mentioned above.
- the VOCs of category (1) are chosen from the group comprising 1-octen-3-ol, 1, 3-octadiene and methyl-2-ethylhexanoate, the VOCs of the category (1). 2) are selected from the group consisting of 2-methylfuran, 3-methylfuran, 3-methyl-1-butanol, 2-methyl-1-butanol and ⁇ -pinene, and VOCs of category (3) are selected from the group consisting of 2-heptene, dimethylsulfide, 4-heptanone, 2 (5H) -furanone and 3-heptanol.
- the predetermined VOCs are detected by gas chromatography followed by mass spectrometry (GC / MS).
- VOCs specifically derived from fungal metabolism which are emitted independently of the fungal species and its carrier and which are only released by fungal species, directly indicates the presence of a fungal contamination while the absence of such VOC indicates the absence of fungal contamination.
- VOCs resulting from fungal metabolism which can also have other biological origins, does not allow conclusion on a fungal contamination.
- the absence of such VOCs indicates the absence of fungal contamination.
- VOCs specifically derived from fungal metabolism but that are emitted according to the fungal species and / or the support their presence indicates the presence of a fungal contamination, while their absence does not allow to conclude on the absence of a fungal contamination.
- methyl-2-ethylhexanoate which is at the base of the VOC emitted independently of the fungal species and its support, but whose formation seems to be due to the transformation of 2-ethylhexanol by the mold.
- 2-ethylhexanol is converted to methyl-2-ethylhexanoate via an oxidation reaction to 2-ethylhexanoic acid which is then esterified to methyl-2-ethylhexanoate.
- ethylhexanoate The presence of methyl-2-ethylhexanoate makes it possible to conclude that there is a fungal contamination.
- the Applicant Company had the merit of developing a method for calculating a chemical fungal contamination index which is based on the following incrementation.
- the presence of a VOC is incremented by a value of "1” if the presence of VOC indicates the presence of a fungal contamination and a value of "0” if the presence of VOC does not allow to conclude to the presence of fungal contamination.
- the absence of a VOC is incremented by a value "-1" if the absence of VOC indicates the absence of a fungal contamination and a value "0” if the absence of VOC does not permit conclude that there is no fungal contamination.
- the Table 1 summarizes the principles of incrementation.
- the chemical fungal contamination index is calculated by adding increments that have been attributed to the presence or absence of each of the predetermined VOCs. The result of this addition, that is to say the chemical index of fungal contamination is either a negative value or equal to zero, or a positive value. If the chemical index of fungal contamination is less than or equal to 0, this indicates the absence of fungal contamination. A strictly positive fungal contamination index indicates the presence of fungal contamination.
- the method of detecting a fungal contamination according to the invention is particularly useful for the early detection of such contamination, that is to say before the appearance of visible signs of contamination.
- This possibility of early detection is for example of great importance in historical monuments, churches or museums, where irreparable damage has in general already been caused when the first visible signs of fungal contamination appear.
- VOC samples in situ were made by diffusion sampling on a carbograph 4 solid adsorbent in twelve dwellings.
- Five of the twelve dwellings contained at least one room with a visible mildew spot greater than 1 m 2 (dwellings 1 to 5) and seven of the twelve dwellings showed no visible signs of fungal contamination (dwellings 7 to 12).
- the levy is provided by a diffusion tube.
- the sampler consists of a cartridge, a diffusive body and an adapter.
- the cartridge is cylindrical (40-60 mesh net s), of external diameter 4.8 mm, and containing 300 mg graphitized carbon (Carbograph 4). This cartridge is placed before sampling in a diffusive polyethylene body. The assembly is then screwed onto a rack using a clipable support.
- the passive tubes are exposed on site for a period of 7 days.
- the sampling point is between 0.5 and 1 m in height. After exposure, the cartridges are kept in the refrigerator before analysis.
- VOCs fungal or otherwise
- the tubes containing the adsorbent are transferred to an analytical chain of the laboratory. This chain consists of the combination of three techniques:
- GC gas chromatography
- FID flame ionization
- MS mass spectrometry
- a contamination index is then calculated in order to group together all the information provided by the presence or absence of the specific VOCs identified.
- the index is calculated according to the presence or absence of each of these VOCs.
- the method of incrementation of this index is shown schematically in FIG.
- an index value strictly greater than 0 makes it possible to conclude on the presence of a fungal development in the studied housing whereas a negative or zero value excludes it.
- Table II Values of indices assigned to each dwelling
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Molecular Biology (AREA)
- Toxicology (AREA)
- Immunology (AREA)
- Microbiology (AREA)
- Biophysics (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08775669.8A EP2130043B1 (fr) | 2007-03-05 | 2008-03-04 | Procédé de détection d'une contamination fongique |
US12/529,817 US8127593B2 (en) | 2007-03-05 | 2008-03-04 | Method for detecting fungal contamination |
ES08775669.8T ES2617047T3 (es) | 2007-03-05 | 2008-03-04 | Procedimiento de detección de una contaminación fúngica |
CA2679748A CA2679748C (fr) | 2007-03-05 | 2008-03-04 | Procede de detection d'une contamination fongique |
DK08775669.8T DK2130043T3 (en) | 2007-03-05 | 2008-03-04 | PROCEDURE FOR DETECTING FUNGI CONTAMINATION |
HRP20170265TT HRP20170265T1 (hr) | 2007-03-05 | 2017-02-20 | Postupak utvrđivanja onečišćenja gljivicama |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0701578A FR2913501B1 (fr) | 2007-03-05 | 2007-03-05 | Procede de detection d'une contamination fongique |
FR0701578 | 2007-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008125770A1 true WO2008125770A1 (fr) | 2008-10-23 |
Family
ID=38603633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2008/050366 WO2008125770A1 (fr) | 2007-03-05 | 2008-03-04 | Procede de detection d'une contamination fongique |
Country Status (11)
Country | Link |
---|---|
US (1) | US8127593B2 (fr) |
EP (1) | EP2130043B1 (fr) |
CA (1) | CA2679748C (fr) |
DK (1) | DK2130043T3 (fr) |
ES (1) | ES2617047T3 (fr) |
FR (1) | FR2913501B1 (fr) |
HR (1) | HRP20170265T1 (fr) |
HU (1) | HUE033167T2 (fr) |
PL (1) | PL2130043T3 (fr) |
PT (1) | PT2130043T (fr) |
WO (1) | WO2008125770A1 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011051577A1 (fr) | 2009-10-30 | 2011-05-05 | Cap Environnement | Procédé et système de détermination de la qualité de l'atmosphère d'un environnement intérieur |
FR2967692A1 (fr) * | 2010-11-23 | 2012-05-25 | Ct Scient Tech Batiment Cstb | Dispositif de detection d'une contamination fongique |
EP2568283A1 (fr) | 2011-09-08 | 2013-03-13 | Centre Scientifique et Technique du Batiment | Procédé de détermination d'une empreinte chimique spécifique de la production de mycotoxines |
EP2610617A1 (fr) * | 2011-12-28 | 2013-07-03 | Centre Scientifique et Technique du Batiment | Dispositif et procédé de détection d'une contamination fongique dans un environnement intérieur |
EP2708604A1 (fr) | 2012-09-14 | 2014-03-19 | Centre Scientifique Et Technique Du Batiment (CSTB) | Procédé de détermination d'un risque de contamination aspergillaire basé sur la détection de composés organiques volatiles microbiens |
WO2024073049A1 (fr) * | 2022-09-30 | 2024-04-04 | O&M Halyard, Inc. | Procédé de vérification de l'efficacité d'un procédé de stérilisation basé sur la présence de composés organiques volatils |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014070727A1 (fr) * | 2012-10-29 | 2014-05-08 | Freshair Sensor Corporation | Capteur passif à base de polymère d'impression moléculaire |
FR3028043B1 (fr) * | 2014-10-31 | 2016-12-09 | Centre Scient Et Technique Du Batiment (Cstb) | Procede de detection d'une contamination a la merule |
LT6458B (lt) | 2016-01-06 | 2017-09-25 | Gamtos Tyrimų Centras | Grūdų užteršimo pelėsiniais grybais aptikimo būdas |
FR3075964B1 (fr) * | 2017-12-21 | 2019-12-20 | Centre Scientifique Et Technique Du Batiment (Cstb) | Procede de detection d'une infestation d'insectes |
US12017506B2 (en) | 2020-08-20 | 2024-06-25 | Denso International America, Inc. | Passenger cabin air control systems and methods |
US11813926B2 (en) | 2020-08-20 | 2023-11-14 | Denso International America, Inc. | Binding agent and olfaction sensor |
US11932080B2 (en) | 2020-08-20 | 2024-03-19 | Denso International America, Inc. | Diagnostic and recirculation control systems and methods |
US11760169B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Particulate control systems and methods for olfaction sensors |
US11881093B2 (en) | 2020-08-20 | 2024-01-23 | Denso International America, Inc. | Systems and methods for identifying smoking in vehicles |
US11636870B2 (en) | 2020-08-20 | 2023-04-25 | Denso International America, Inc. | Smoking cessation systems and methods |
US11760170B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Olfaction sensor preservation systems and methods |
US11828210B2 (en) | 2020-08-20 | 2023-11-28 | Denso International America, Inc. | Diagnostic systems and methods of vehicles using olfaction |
FR3140174B1 (fr) | 2022-09-27 | 2024-10-04 | Centre Scient Et Technique Du Batiment | Procédé de détection de punaises de lit |
-
2007
- 2007-03-05 FR FR0701578A patent/FR2913501B1/fr active Active
-
2008
- 2008-03-04 PT PT87756698T patent/PT2130043T/pt unknown
- 2008-03-04 US US12/529,817 patent/US8127593B2/en active Active
- 2008-03-04 CA CA2679748A patent/CA2679748C/fr active Active
- 2008-03-04 HU HUE08775669A patent/HUE033167T2/en unknown
- 2008-03-04 WO PCT/FR2008/050366 patent/WO2008125770A1/fr active Application Filing
- 2008-03-04 EP EP08775669.8A patent/EP2130043B1/fr active Active
- 2008-03-04 DK DK08775669.8T patent/DK2130043T3/en active
- 2008-03-04 PL PL08775669T patent/PL2130043T3/pl unknown
- 2008-03-04 ES ES08775669.8T patent/ES2617047T3/es active Active
-
2017
- 2017-02-20 HR HRP20170265TT patent/HRP20170265T1/hr unknown
Non-Patent Citations (5)
Title |
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CLAESON ANNA-SARA ET AL: "Volatile metabolites from microorganisms grown on humid building materials and synthetic media.", JOURNAL OF ENVIRONMENTAL MONITORING : JEM OCT 2002, vol. 4, no. 5, October 2002 (2002-10-01), pages 667 - 672, XP002457027, ISSN: 1464-0325 * |
GAO PENGFEI ET AL: "Determination of unique microbial volatile organic compounds produced by five Aspergillus species commonly found in problem buildings", AIHAJ, AMERICAN INDUSTRIAL HYGIENE ASSOCIATION, FAIRFAX, VA, US, vol. 63, no. 2, March 2002 (2002-03-01), pages 135 - 140, XP009091499, ISSN: 1542-8117 * |
SCHLEIBINGER H ET AL: "Emission patterns and emission rates of MVOC and the possibility for predicting hidden mold damage?", INDOOR AIR 2005, vol. 15 Suppl 9, 2005, pages 98 - 104, XP002457026, ISSN: 0905-6947 * |
SCHLEIBINGER H; LAUSSMANN D; EIS D; SAMWER H; RUDEN H: "Sind MVOC geeignete Indikatoren für einen verdeckten Schimmelpilzbefall?", UMWELTMEDIZIN IN FORSCHUNG UND PRAXIS, vol. 9, 2004, pages 151 - 162, XP009091599 * |
WALINDER ROBERT; WIESLANDER GUNILLA; NORBACK DAN; WESSEN BENGT; VENGE PER: "Nasal lavage biomarkers: Effects of water damage and microbial growth in an office building", ARCHIVES OF ENVIRONMENTAL HEALTH, vol. 56, 2001, pages 30 - 36, XP009091580 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011051577A1 (fr) | 2009-10-30 | 2011-05-05 | Cap Environnement | Procédé et système de détermination de la qualité de l'atmosphère d'un environnement intérieur |
FR2967692A1 (fr) * | 2010-11-23 | 2012-05-25 | Ct Scient Tech Batiment Cstb | Dispositif de detection d'une contamination fongique |
WO2012069752A1 (fr) * | 2010-11-23 | 2012-05-31 | Centre Scientifique Et Technique Du Batiment (Cstb) | Dispositif de detection d'une contamination fongique |
US10227628B2 (en) | 2010-11-23 | 2019-03-12 | Centre Scientifique Et Technique Du Batiment | Device for detecting a fungal contamination |
EP2568283A1 (fr) | 2011-09-08 | 2013-03-13 | Centre Scientifique et Technique du Batiment | Procédé de détermination d'une empreinte chimique spécifique de la production de mycotoxines |
FR2979992A1 (fr) * | 2011-09-08 | 2013-03-15 | C S T B Ct Scient Et Tech Du Batiment | Procede de determination d'une empreinte chimique specifique de la production de mycotoxines |
EP2610617A1 (fr) * | 2011-12-28 | 2013-07-03 | Centre Scientifique et Technique du Batiment | Dispositif et procédé de détection d'une contamination fongique dans un environnement intérieur |
FR2985314A1 (fr) * | 2011-12-28 | 2013-07-05 | Ct Scient Tech Batiment Cstb | Developpement d'un microsysteme de detection |
US9725751B2 (en) | 2011-12-28 | 2017-08-08 | Centre Scientifique Et Technique Du Batiment | Development of a detection microsystem |
EP2708604A1 (fr) | 2012-09-14 | 2014-03-19 | Centre Scientifique Et Technique Du Batiment (CSTB) | Procédé de détermination d'un risque de contamination aspergillaire basé sur la détection de composés organiques volatiles microbiens |
WO2024073049A1 (fr) * | 2022-09-30 | 2024-04-04 | O&M Halyard, Inc. | Procédé de vérification de l'efficacité d'un procédé de stérilisation basé sur la présence de composés organiques volatils |
Also Published As
Publication number | Publication date |
---|---|
PL2130043T3 (pl) | 2017-06-30 |
ES2617047T3 (es) | 2017-06-15 |
CA2679748A1 (fr) | 2008-10-23 |
EP2130043A1 (fr) | 2009-12-09 |
FR2913501B1 (fr) | 2012-02-03 |
FR2913501A1 (fr) | 2008-09-12 |
HRP20170265T1 (hr) | 2017-06-16 |
DK2130043T3 (en) | 2017-03-06 |
US20100107740A1 (en) | 2010-05-06 |
PT2130043T (pt) | 2017-03-06 |
US8127593B2 (en) | 2012-03-06 |
EP2130043B1 (fr) | 2016-12-07 |
HUE033167T2 (en) | 2017-11-28 |
CA2679748C (fr) | 2016-04-26 |
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