WO2001022041A1 - Improved method and system for measuring multiphase flow using multiple pressure differentials - Google Patents
Improved method and system for measuring multiphase flow using multiple pressure differentials Download PDFInfo
- Publication number
- WO2001022041A1 WO2001022041A1 PCT/US2000/025865 US0025865W WO0122041A1 WO 2001022041 A1 WO2001022041 A1 WO 2001022041A1 US 0025865 W US0025865 W US 0025865W WO 0122041 A1 WO0122041 A1 WO 0122041A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- mass flow
- flow rate
- pressure
- throat
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/08—Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
Definitions
- the present invention relates to a flow meter for measuring the flow of very high void fraction multi-phase fluid streams. More particularly, the present invention relates to an apparatus and method in which multiple pressure differentials are used to determine mass flow rates of gas and liquid phases of a predominantly gas fluid stream to thereby determine the mass flow rate of each phase.
- the mass flow rate of the liquid may be comparable to or even several times greater than that of the gas phase due to its greater density.
- the presence of the liquid phase distorts the gas mass flow rate measurements and causes conventional meters, such as orifice plates or venturi meters, to overestimate the flow rate of the gas phase.
- the gas mass flow can be estimated using the standard equation
- m g is the gas mass flow rate
- A is the area of the throat
- ⁇ P is the measured
- the pressure drop is caused by the interaction between the
- This invention is complicated and must use a positive displacement
- liquid is 75% of the volume.
- Boll, et al measure a flow of solids in a gas stream.
- solids in a gas stream For example, coal dust in a
- phase flows which have less than five to ten (5-10%) non-gas phase by volume.
- the liquid produced is a light hydrocarbon liquid (e.g.
- multi-phase fluid in order to determine flow rate for each of the phases.
- the flow meter for metering the phases of a multiple phase fluid.
- a cross-sectional area change in the flow conduit such as a venturi with an elongate passage. Disposed along the elongate passage is a converging
- the flow meter also includes
- the first step is calculating a gas density for the gas
- FIG. 1 shows a side, cross-sectional view of a differential pressure flow
- FIG. 2 shows a side, cross-sectional view of a differential pressure flow
- FIG. 3 is a flow chart showing the steps required to calculate the mass
- FIG. 1 there is shown another differential pressure flow
- the differential pressure flow meter 110 includes a venturi 114 formed by a sidewall 118 which defines a fluid flow
- the fluid flow passage 122 is segmented into an inlet section 126, a
- the conduit may be larger or smaller
- One important characteristic of the flow meter is that the preferred
- contraction ratio in the conduit should be between .4 and .75.
- ratio is defined as the ratio of the throat diameter 134 to the upstream conduit
- the inlet section 126 has a diameter of about 3.8 cm adjacent the opening 142 at
- the extended throat section 134 remains substantially the same
- diameter throughout its length may be about 30 cm long to provide ample
- the diffuser section 138 tapers outwardly at an angle of about three degrees (3°) until the diameter of the outlet section
- passage 140 is substantially the same as that at the inlet section 126 (i.e. 3 cm). It
- the differential pressure flow meter shown in FIG. 1 utilizes up to
- pressure measuring port 150 is disposed to measure the pressure in the inlet
- the first pressure measuring port 150 is connected to a pressure monitoring means, such as a pressure transducer 151, to provide a pressure
- a second pressure measuring port 154 is provided at the entrance of the
- the second pressure measuring port 154 is
- a pressure transducer 151 is also coupled to the second pressure measuring
- a third pressure monitoring port 158 is a third pressure monitoring port 158.
- the third pressure monitoring port 158 is disposed adjacent the distal end 134b of
- the respective pressure measuring ports 150, 154, and 158 are disposed in
- processor 153 enables the acquisition of the measured pressure differentials
- a fifth pressure measuring port 162 is disposed in the outlet section 140 adjacent to the
- fourth and fifth monitoring ports allow a pressure differential ⁇ P] to be measured.
- distal end 138b of the diffuser section 138 can also be analyzed.
- FIG. 2 shows
- a converging section 172 as formed by an annular shoulder in a venturi tube 170
- radius of curvature for an annular shoulder 172 is about 0.652 cm.
- converging section can also be formed by placing a solid object in the conduit
- the gas phase accelerates in the converging section of the nozzle, the denser
- liquid phase velocity appreciably lags that of the lighter gas phase.
- This method uses the four values which are
- ⁇ P 3 and ⁇ P 0 or the pressure differentials ⁇ P 0 and ⁇ P 2 may be used.
- the gas density for the gas flow must be calculated based on the
- rho g is the density of natural gas (i.e. a mixture methane and other
- P is the pressure upstream from the venturi in pounds per square
- T is the temperature upstream from the venturi in degrees
- the second step is finding a normalized gas mass flow rate based on the
- ⁇ P 3 is the measured pressure differential across a venturi
- ⁇ P 2 is the measured pressure differential across a venturi throat.
- the meter may be sized to match the production rate from a
- Equation 2 The functional form of Equation 2 is arrived at by derivation from the
- Equation 2 can be used with equivalent results.
- the functional form of Equation 2 is consistent with the conservation laws and
- the third step is computing a gas mass flow rate using the normalized gas
- mgm is the normalized gas mass flow rate
- a j is the venturi throat area
- ⁇ is the contraction ratio of the throat area
- rho gw is the gas density at current well conditions.
- the fourth step is estimating the gas velocity in the venturi tube throat.
- m g is the gas mass flow rate
- rho g is the density of the gas phase for a specific well
- a t is the venturi throat area.
- the fifth step is calculating the pressure drop experienced by the gas
- the pressure drop is calculated as follows:
- ⁇ P 3 is the measured pressure differential across a venturi
- rho gw is gas density at well conditions
- u g is the gas velocity in the venturi throat
- ⁇ is the contraction ratio of the throat area to the upstream area.
- Step six is estimating the liquid velocity (u,) in the venturi throat using the
- ⁇ P 3 is the measured pressure differential across a venturi
- ⁇ P gl3 is the pressure drop experienced by the gas-phase due to
- rho is the liquid density
- gcfw is a constant which characterizes wall friction.
- gcfw 0.062. This value may be adjusted depending on
- the seventh step is computing the friction between the liquid phase and a
- gcfw is a constant which characterizes wall friction
- rhoj is the liquid density
- U ! is the liquid velocity in the venturi throat.
- the eighth step is calculating the total mass flow rate based on the
- ⁇ P 3 is the measured pressure differential across a venturi
- ⁇ is the contraction ratio of the throat diameter to the upstream
- u g is the gas velocity in the venturi throat.
- the liquid mass flow rate can now be calculated as the difference between
- m t is the total mass flow rate
- m g is the gas mass flow rate
- FIG. 3 shows a summary of the method used to accurately calculate the
- the following step is estimating the gas velocity in the venturi
- the next step is calculating the pressure drop experienced by the gas-phase due to work performed by the gas phase in accelerating the liquid
- Equations 10 ⁇ is void fraction, p g is density of a gas at standard
- u g is the gas velocity, A, is the conduit area upstream of the venturi
- a 2 is the conduit area in the venturi throat, and P, and P 2 are the pressures at
- the mass flow rate of the gas phase can be significantly low
- ⁇ 2 A 2 represents the cross sectional area occupied by the gas phase.
- ⁇ P 3 is large with respect to ⁇ P gl3 the quantity under the radical can be
- C gI3 is a constant that is determined experimentally. Empirically it has
- Equations 10 - 16 are used to derive
- the observed measurement uncertainties can be
- the meter reading can be adjusted to reflect the true value and the
- uncertainty in the gas phase mass flow rate measurement can be reduced to less than 0.5% of reading if the gas and liquid flow rates change by less than 50% or
- the repeatability of the measurement is essentially the random
- the mass flow rate of the liquid phase can be directly obtained from
- liquid mass flow rate cannot be obtained directly from one-dimensional theory.
- the velocity of the liquid phase can, however, be estimated directly as now
- Equation 17 allows us to derive Equation 5 in the calculation method. Rearranging the liquid phase energy equation yields Equation 18
- the second term on the right hand side is the friction loss assuming that only the
- the total mass flow rate m t can then be obtained directly from ⁇ P 3 once u g is
- the uncertainty in the gas mass flow rate measurement can be reduced to ⁇ 0.5% of reading by benchmarking even if the
- the total mass flow rate can be reduced by ⁇ 2% of reading for the same ⁇ 50%
- mass flow rate measurement is dependent on both the gas phase and total mass
- Measurement uncertainties can be significantly reduced if flow rates are
- the liquid mass flow rate can be
- the void fraction may be
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU75986/00A AU7598600A (en) | 1999-09-22 | 2000-09-21 | Improved method and system for measuring multiphase flow using multiple pressuredifferentials |
EP00965242A EP1409966A4 (en) | 1999-09-22 | 2000-09-21 | Improved method and system for measuring multiphase flow using multiple pressure differentials |
CA002399536A CA2399536A1 (en) | 1999-09-22 | 2000-09-21 | Improved method and system for measuring multiphase flow using multiple pressure differentials |
NO20023858A NO20023858L (en) | 1999-09-22 | 2002-08-14 | Improved method and system for measuring multiphase flow using multiple pressure differentials |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/400,946 US6502467B1 (en) | 1997-09-24 | 1999-09-22 | System for measuring multiphase flow using multiple pressure differentials |
US09/400,946 | 1999-09-22 | ||
US09/401,375 | 1999-09-22 | ||
US09/401,375 US6332111B1 (en) | 1997-09-24 | 1999-09-22 | Method and system for measuring multiphase flow using multiple pressure differentials |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001022041A1 true WO2001022041A1 (en) | 2001-03-29 |
WO2001022041A9 WO2001022041A9 (en) | 2002-10-03 |
Family
ID=27017238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/025865 WO2001022041A1 (en) | 1999-09-22 | 2000-09-21 | Improved method and system for measuring multiphase flow using multiple pressure differentials |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1409966A4 (en) |
AU (1) | AU7598600A (en) |
CA (1) | CA2399536A1 (en) |
NO (1) | NO20023858L (en) |
WO (1) | WO2001022041A1 (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002088850A1 (en) | 2001-04-26 | 2002-11-07 | Abb As | Method for detecting and correcting sensor failure in oil and gas production system |
US7293471B2 (en) | 2004-02-27 | 2007-11-13 | Roxar Flow Measurement As | Flow meter for measuring fluid mixtures |
EP2171405A1 (en) * | 2007-07-13 | 2010-04-07 | McCrometer, Inc. | Two-phase flow meter |
CN101333924B (en) * | 2008-05-23 | 2013-02-13 | 安东石油技术(集团)有限公司 | Oil gas water flow measurement system |
CN101333925B (en) * | 2008-05-23 | 2013-02-13 | 安东石油技术(集团)有限公司 | Oil gas water three phase on-line inseparate flow measurement system |
CN101333926B (en) * | 2008-05-23 | 2013-05-15 | 安东石油技术(集团)有限公司 | Oil gas water flow measurement system possessing automatic control device |
CN101338664B (en) * | 2008-05-23 | 2013-05-15 | 安东石油技术(集团)有限公司 | Condensed gas flow quantity measuring systems |
CN105486358A (en) * | 2015-11-19 | 2016-04-13 | 中国石油大学(华东) | Gas-liquid two-phase flow parameter measuring method based on double-differential pressure of Venturi tube |
US10544674B2 (en) | 2017-08-23 | 2020-01-28 | Saudi Arabian Oil Company | Multiphase flow meter with tuning fork |
CN111222229A (en) * | 2019-12-27 | 2020-06-02 | 清华大学深圳国际研究生院 | Method for constructing instantaneous flow measurement model in gas-liquid two-phase flow dynamic flow process |
US10890067B2 (en) | 2019-04-11 | 2021-01-12 | Saudi Arabian Oil Company | Method to use a buoyant body to measure two-phase flow in horizontal wells |
US10908007B1 (en) | 2019-08-20 | 2021-02-02 | Saudi Arabian Oil Company | Multiphase flow metering system for horizontal well compartments |
CN112539790A (en) * | 2020-12-02 | 2021-03-23 | 哈尔滨工程大学 | Real-time online measurement system and method for vacuole share of two-phase flow in pipeline |
US11187044B2 (en) | 2019-12-10 | 2021-11-30 | Saudi Arabian Oil Company | Production cavern |
US11346177B2 (en) | 2019-12-04 | 2022-05-31 | Saudi Arabian Oil Company | Repairable seal assemblies for oil and gas applications |
US11460330B2 (en) | 2020-07-06 | 2022-10-04 | Saudi Arabian Oil Company | Reducing noise in a vortex flow meter |
CN115452081A (en) * | 2022-09-22 | 2022-12-09 | 西安交通大学 | Two-phase flow gas phase mass flow measuring method and system based on differential pressure throttling device |
CN116839809B (en) * | 2023-09-04 | 2023-12-05 | 哈尔滨工程大学 | Marine differential pressure principle instrument measurement correction method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108664678B (en) * | 2017-04-01 | 2021-08-31 | 中国石油化工股份有限公司 | Yield prediction method |
CN108664679B (en) * | 2017-04-01 | 2021-07-27 | 中国石油化工股份有限公司 | Oil and gas well production data analysis method |
CN113188613B (en) * | 2021-03-05 | 2024-04-05 | 深圳市联恒星科技有限公司 | Multi-phase flow measurement method and system based on uncertainty analysis |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4231262A (en) * | 1979-03-28 | 1980-11-04 | The Babcock & Wilcox Company | System for measuring entrained solid flow |
US5708211A (en) * | 1996-05-28 | 1998-01-13 | Ohio University | Flow regime determination and flow measurement in multiphase flow pipelines |
US5869771A (en) * | 1996-09-18 | 1999-02-09 | Alberta Research Council | Multi-phase fluid flow measurement apparatus and method |
WO1999015862A1 (en) * | 1997-09-24 | 1999-04-01 | Lockheed Martin Idaho Technologies Company | Special configuration differential pressure flow meter |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2720498B1 (en) * | 1994-05-27 | 1996-08-09 | Schlumberger Services Petrol | Multiphase flowmeter. |
-
2000
- 2000-09-21 WO PCT/US2000/025865 patent/WO2001022041A1/en active Application Filing
- 2000-09-21 CA CA002399536A patent/CA2399536A1/en not_active Abandoned
- 2000-09-21 EP EP00965242A patent/EP1409966A4/en not_active Withdrawn
- 2000-09-21 AU AU75986/00A patent/AU7598600A/en not_active Abandoned
-
2002
- 2002-08-14 NO NO20023858A patent/NO20023858L/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4231262A (en) * | 1979-03-28 | 1980-11-04 | The Babcock & Wilcox Company | System for measuring entrained solid flow |
US5708211A (en) * | 1996-05-28 | 1998-01-13 | Ohio University | Flow regime determination and flow measurement in multiphase flow pipelines |
US5869771A (en) * | 1996-09-18 | 1999-02-09 | Alberta Research Council | Multi-phase fluid flow measurement apparatus and method |
WO1999015862A1 (en) * | 1997-09-24 | 1999-04-01 | Lockheed Martin Idaho Technologies Company | Special configuration differential pressure flow meter |
Non-Patent Citations (1)
Title |
---|
See also references of EP1409966A4 * |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO329197B1 (en) * | 2001-04-26 | 2010-09-13 | Abb As | Method for detection and correction of sensor errors in oil and gas production systems |
US6772082B2 (en) | 2001-04-26 | 2004-08-03 | Abb As | Method for detecting and correcting sensor failure in oil and gas production system |
WO2002088850A1 (en) | 2001-04-26 | 2002-11-07 | Abb As | Method for detecting and correcting sensor failure in oil and gas production system |
US7293471B2 (en) | 2004-02-27 | 2007-11-13 | Roxar Flow Measurement As | Flow meter for measuring fluid mixtures |
EP2171405A4 (en) * | 2007-07-13 | 2014-03-12 | Mccrometer Inc | Two-phase flow meter |
EP2171405A1 (en) * | 2007-07-13 | 2010-04-07 | McCrometer, Inc. | Two-phase flow meter |
CN101333924B (en) * | 2008-05-23 | 2013-02-13 | 安东石油技术(集团)有限公司 | Oil gas water flow measurement system |
CN101333925B (en) * | 2008-05-23 | 2013-02-13 | 安东石油技术(集团)有限公司 | Oil gas water three phase on-line inseparate flow measurement system |
CN101333926B (en) * | 2008-05-23 | 2013-05-15 | 安东石油技术(集团)有限公司 | Oil gas water flow measurement system possessing automatic control device |
CN101338664B (en) * | 2008-05-23 | 2013-05-15 | 安东石油技术(集团)有限公司 | Condensed gas flow quantity measuring systems |
CN105486358A (en) * | 2015-11-19 | 2016-04-13 | 中国石油大学(华东) | Gas-liquid two-phase flow parameter measuring method based on double-differential pressure of Venturi tube |
US10927673B2 (en) | 2017-08-23 | 2021-02-23 | Saudi Arabian Oil Company | Multiphase flow meter with tuning fork |
US10544674B2 (en) | 2017-08-23 | 2020-01-28 | Saudi Arabian Oil Company | Multiphase flow meter with tuning fork |
US10890067B2 (en) | 2019-04-11 | 2021-01-12 | Saudi Arabian Oil Company | Method to use a buoyant body to measure two-phase flow in horizontal wells |
US10908007B1 (en) | 2019-08-20 | 2021-02-02 | Saudi Arabian Oil Company | Multiphase flow metering system for horizontal well compartments |
US11346177B2 (en) | 2019-12-04 | 2022-05-31 | Saudi Arabian Oil Company | Repairable seal assemblies for oil and gas applications |
US11187044B2 (en) | 2019-12-10 | 2021-11-30 | Saudi Arabian Oil Company | Production cavern |
CN111222229A (en) * | 2019-12-27 | 2020-06-02 | 清华大学深圳国际研究生院 | Method for constructing instantaneous flow measurement model in gas-liquid two-phase flow dynamic flow process |
CN111222229B (en) * | 2019-12-27 | 2022-10-21 | 清华大学深圳国际研究生院 | Method for constructing instantaneous flow measurement model in gas-liquid two-phase flow dynamic flow process |
US11460330B2 (en) | 2020-07-06 | 2022-10-04 | Saudi Arabian Oil Company | Reducing noise in a vortex flow meter |
CN112539790A (en) * | 2020-12-02 | 2021-03-23 | 哈尔滨工程大学 | Real-time online measurement system and method for vacuole share of two-phase flow in pipeline |
CN112539790B (en) * | 2020-12-02 | 2024-04-30 | 哈尔滨工程大学 | Real-time online measurement system and method for cavitation share of two-phase flow in pipeline |
CN115452081A (en) * | 2022-09-22 | 2022-12-09 | 西安交通大学 | Two-phase flow gas phase mass flow measuring method and system based on differential pressure throttling device |
CN116839809B (en) * | 2023-09-04 | 2023-12-05 | 哈尔滨工程大学 | Marine differential pressure principle instrument measurement correction method |
Also Published As
Publication number | Publication date |
---|---|
EP1409966A1 (en) | 2004-04-21 |
EP1409966A4 (en) | 2006-02-01 |
NO20023858D0 (en) | 2002-08-14 |
AU7598600A (en) | 2001-04-24 |
WO2001022041A9 (en) | 2002-10-03 |
CA2399536A1 (en) | 2001-03-29 |
NO20023858L (en) | 2002-09-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6332111B1 (en) | Method and system for measuring multiphase flow using multiple pressure differentials | |
WO2001022041A1 (en) | Improved method and system for measuring multiphase flow using multiple pressure differentials | |
US6546811B2 (en) | Multiphase flow calculation software | |
US6898986B2 (en) | Meter for the measurement of multiphase fluids and wet gas | |
US4856344A (en) | Measuring flow in a pipe | |
US6532826B1 (en) | Measuring device for the gas-liquid flow rate of multiphase fluids | |
US20110259119A1 (en) | Two-phase flow meter | |
US11150121B2 (en) | Monitoring of fluid flow | |
EP2192391A1 (en) | Apparatus and a method of measuring the flow of a fluid | |
NO333232B1 (en) | Flow templates for multiphase mixtures | |
WO1993017305A1 (en) | Flow measurement system | |
US6382032B1 (en) | Apparatus and method for measuring flow of gas with entrained liquids | |
WO2005040732A1 (en) | Wet gas measurement apparatus and method | |
Brennan et al. | The influence of swirling flow on orifice and turbine flowmeter performance | |
EP2233895A1 (en) | Method and device for flow metering and for forming a fluid medium sample | |
Park | Effects of inlet shapes of critical venturi nozzles on discharge coefficients | |
Fincke et al. | Performance characteristics of an extended throat flow nozzle for the measurement of high void fraction multi-phase flows | |
US20240151564A1 (en) | Carbon dioxide multiphase flow measurement based on dielectric permittivity | |
US20230119021A1 (en) | Energy Correlation Flow Meters | |
Taylor | Flow measurement by self-averaging pitot-tubes | |
Shen et al. | Diagnostics and improvement of wellhead gas metering: a case study | |
Grimley | Performance Testing of Ultrasonic Flow Meters | |
Kruse et al. | Performance Characteristics of an Extended Throat Flow Nozzle for the Measurement of High Void Fraction Multi-Phase Flows | |
RU2054676C1 (en) | Method of determination of specific velocity of flow in channels | |
Peters et al. | AN OVERVIEW OF THE McCROMETER V-CONE METER AMERICAN SCHOOL OF GAS MEASUREMENT TECHNOLOGY 2003 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM 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 NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA 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 ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2000965242 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2399536 Country of ref document: CA |
|
AK | Designated states |
Kind code of ref document: C2 Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM 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 NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: C2 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
COP | Corrected version of pamphlet |
Free format text: PAGES 1/3-3/3, DRAWINGS, REPLACED BY NEW PAGES 1/3-3/3; DUE TO LATE TRANSMITTAL BY THE RECEIVING OFFICE |
|
WWP | Wipo information: published in national office |
Ref document number: 2000965242 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: JP |