NL2016828B1 - Method for monitoring gas concentrations at a site - Google Patents
Method for monitoring gas concentrations at a site Download PDFInfo
- Publication number
- NL2016828B1 NL2016828B1 NL2016828A NL2016828A NL2016828B1 NL 2016828 B1 NL2016828 B1 NL 2016828B1 NL 2016828 A NL2016828 A NL 2016828A NL 2016828 A NL2016828 A NL 2016828A NL 2016828 B1 NL2016828 B1 NL 2016828B1
- Authority
- NL
- Netherlands
- Prior art keywords
- sensor device
- site
- gas
- data
- sensing device
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/14—Toxic gas alarms
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention relates to a method for monitoring gas (1) concentrations at a site (2), comprising the steps of: providing a sensing device (3) at a measurement position (4) at the site, the sensing device being part of a sniffer system (5) of one or more sensing devices, using a communication system (6) for communicating measurement data (7) between the sensing device and a base computer system (8), wherein the measurement data at least comprises the concentration of at least one gas at the measurement position, triggering an alarm when the gas concentration measured by the sensing device exceeds a predetermined threshold, characterized by continuously storing monitoring data of the sensing device, comprising at least the measurement data, in a storage system (9) and analysing the stored monitoring data in a data analytics step to detect patterns indicative of sensing device or site conditions.
Description
Title: Method for monitoring gas concentrations at a site FIELD OF THE INVENTION
The present invention relates to a method for monitoring gas concentrations at a site, comprising the steps of: providing a sensing device at a measurement position at the site, the sensing device being part of a sniffer system of one or more sensing devices, using a communication system for communicating measurement data between the sensing device and a base computer system, wherein the measurement data at least comprises the concentration of at least one gas at the measurement position, triggering an alarm when the gas concentration measured by the sensing device exceeds a predetermined threshold.
The present invention also concerns a monitoring system for monitoring gas concentrations at a site.
BACKGROUND OF THE INVENTION
Such methods are well-known in the art. US 2005/0035869 A1 for instance discloses a personal hydrogen sulphide gas alarm system for monitoring well-related conditions at a site. The alarm system triggers a fault monitoring system in response to detecting an abnormally high concentration of hydrogen sulphide to record a hydrogen sulphide fault and convey the respective information to a remote computer. US 6252510 B1 discloses a wireless monitoring system comprising one or more monitoring devices. Each of the monitoring devices can transmit data to and from an output centre or an alarm system. WO 2016/005805 A1 discloses a system for monitoring the safety of personnel on a work site, by providing the personnel with portable battery-powered safety monitors equipped with alarms and sensors to detect hazardous conditions. Each monitor is capable of serving as a node in a network of monitors to send information concerning detected alarms to other monitors in the network. A problem with the known methods is that such methods only provide relatively simple, local threshold violation alerts, i.e. if the respective sensing device detects a dangerous gas concentration, an alarm is triggered and action is taken, either by the person carrying the sensing device or by an emergency service alerted by the alarm.
In many cases, however, the alarm may be triggered too late, for instance if the person carrying the sensing device wears the sensing device at a wrong location on the person’s body, e.g. on the person’s helmet instead of the person’s chest. In such a case the person may have already inhaled dangerous amounts of gas without the sensing device being aware of this. Therefore, the person could die without an alarm ever being triggered.
In other situations the sensing device may function appropriately - triggering the alarm when the gas concentration exceeds the predetermined threshold. However, a further danger may lie in the cumulative exposure of the person to the gas. The known alarm and monitoring devices so not address such situations.
Also, in case of a gas leak being present at the site, it is preferred for a person rushing towards the gas leak (e.g. to investigate or repair the leak) to be aware of gas concentrations in the wider area around the leak. The known alarm and monitoring systems do not provide such information. Such information could be useful to the person for instance for establishing a safe route towards the leak.
Summarizing, the present monitoring systems do not allow for the wider safety situation of the individual sensing device and the site as a whole to be effectively studied, decreasing safety at the site.
An object of the invention is thus to provide a method for monitoring gas concentrations at a site, wherein the wider safety situation of the individual sensing device and the site as a whole are taken into account to improve site safety.
SUMMARY OF THE INVENTION
Hereto, the method according to the invention is characterized by continuously storing monitoring data of the sensing device, comprising at least the measurement data, in a storage system and analysing the stored monitoring data in a data analytics step to detect patterns indicative of sensing device conditions or site conditions.
By continuously storing monitoring data of the sensing device, such as sensing device location/movement, sensing device health, when an alarm is triggered, et cetera, and subsequently analysing the stored monitoring data in a data analytics step to detect patterns indicative of sensing device conditions or site conditions, the wider safety situation of the individual sensing device and the site as a whole can be studied and preventative measures can be taken if necessary. For instance, at a certain moment in time a person may be located at a certain location at the site and the sensing device registers a first concentration of a gas. At a later point in time, the person may again be located at the same location, wherein the sensing device registers a second gas concentration higher than the first gas concentration. This information can for example be used to predict the development of the gas concentration at the location at a later point in time (the increase in gas concentration possibly indicating a gas leak).
The continuous logging/storing of for instance sensing device accelerometer data can be used to see if the behaviour of the person wearing the sensing device is “normal” (drowsiness, unsteady gait - or worse - the person lying on the ground will show up as certain patterns in the respective dataset to be analysed). Such data can also be used to determine if the sensing device is worn in the correct way: the respective accelerometer data patterns associated with the device being attached to the person’s chest (correct) will differ from data patterns associated with the sensing device being attached to person’s head or helmet (incorrect).
Also, logging of movement patterns, for example obtained by recording position data associated with the device, can be used together with gas concentration measurements to map air quality at different locations at the site.
In the context of this patent application, the expression ‘site’ may relate to for instance chemical processing plants, animal fat and oil processing facilities, asphalt storage facilities, blast furnaces, breweries and fermentation process plants, silk processing plants, textile printing facilities, coal gasification plants, coke ovens, mines, fishing vessel holds, geothermal plants, waste processing facilities, paper production facilities, sewage treatment plants (or sewage systems), slaughterhouses, et cetera, et cetera. Furthermore, ‘hot spots’ concern locations where relatively high concentrations of gas are detected and ‘cold spots’ relate to locations where relatively low concentrations of gas are detected.
The ‘base computer system’ and the ‘storage system’ may broadly relate to a local system on the sensing device, but preferably relate to a centralized computer system operated independently of the sensing device, such as a cloud-based system as commonly found in today’s ‘Internet of Things’ (loT) era.
An embodiment relates to an aforementioned method, wherein the data analytics step comprises establishing a total exposure of the sensing device to the gas over time based on the continuously stored gas concentration at the measurement position. Determining the total exposure of a location (in case of a fixed sensing device) or a person (in case of a wearable/portable sensing device) is highly advantageous to predict health risks to personnel already at an early stage.
An embodiment relates to an aforementioned method, wherein the data analytics step comprises identifying hot and cold exposure spots at the site based on the measurement data of multiple sensing devices. The data of the multiple sensing devices can be advantageously used to chart the hot and cold spots at the site. Of course, a combination of measurement data from fixed as well as portable sensing devices can be used.
An embodiment relates to an aforementioned method, wherein the monitoring data comprises the time an alarm is triggered and the data analytics step comprises correlating alarms over time to identify problem areas at the site. In case of multiple alarms having been triggered within a short period of time, further inspection of the problem area could be warranted.
An embodiment relates to an aforementioned method, wherein the monitoring data comprises a health status of the sensing device. Such a health status may relate to battery status, sensor functioning, et cetera.
An embodiment relates to an aforementioned method, wherein the gas is H2S and/or CO and/or 02 and/or NOx, such as NO, N02 or N03. Especially H2S is a very dangerous gas, which can kill within seconds. With the relatively simple prior art systems, that trigger an alarm when a certain threshold is exceeded, the health of the person being exposed to the gas has often already been in extreme danger when the alarm actually goes off. The present invention provides a method of detecting whether gas levels, such as H2S levels, are about to get hazardous already at an early stage, allowing action to be taken before the situation really gets out of hand.
An embodiment relates to an aforementioned method, wherein the storage system is a cloud-based storage system or a server-based system, increasing storage reliability and flexibility.
An embodiment relates to an aforementioned method, wherein the communication system (preferably a wireless communication system communicating with an external server) is a LoRa-based or Sigfox-based communication system to allow for very long battery life of the sensing device and to provide for flexibility of placement/movement of the sensing device.
An embodiment relates to an aforementioned method, wherein the sensing device is a fixed sensing device installed at a fixed measurement position at the site. Having fixed sensing devices installed at the site allows for the position of the sensing device to be strategically determined beforehand. E.g. a higher density of fixed sensing devices could be installed near critical areas, whereas a lower density of sensing devices could be installed near less critical areas. The positioning of such fixed sensing devices could advantageously take into account the range/strength of the wireless signal.
An embodiment relates to an aforementioned method, wherein the sensing device is a personal sensing device worn on a body of a person located at the site. Such a configuration allows for a wider range of data analytics methods to be carried out, because the personal sensing device will usually not be at a fixed location at the site. Also, the personal sensing device will of course provide the best possibilities for monitoring the person’s health and the direct environment of the person.
An embodiment relates to an aforementioned method, wherein the personal sensing device comprises a gyroscope and an accelerometer to measure accelerations and directional vector on the person’s body, wherein the measured accelerations and directional vector are used to determine the position and orientation of the personal sensing device on the person’s body. As explained before, the sensing device accelerometer data can be used to see if the behaviour of the person wearing the sensing device is “normal” (drowsiness, unsteady gait - or worse - the person lying on the ground will show up as certain patterns in the respective dataset to be analysed). Such data can also be used to determine if the sensing device is worn in the correct way: the respective accelerometer data patterns associated with the device being attached to the person’s chest (correct) will differ from data patterns associated with the sensing device being attached to person’s head or helmet (incorrect).
An embodiment relates to an aforementioned method, wherein a wear alarm is triggered if the personal sensing device is wrongly positioned on the person’s body. The inventor has shown the insight that many fatalities occur due to the wearing of the sensing device in the wrong way. Triggering such an alarm long before the person has even entered an area with toxic gas levels has proven to be greatly beneficial with respect to the prevention of fatalities.
An embodiment relates to an aforementioned method, wherein the data analytics step comprises establishing a total exposure of the person based on the total exposure of the sensing device to the gas over time. The inventor has found that such a “personal dosimeter” has led to a further decrease in fatalities. Many fatalities occur due to the person being exposed to (a lower concentration of) a gas multiple times or during longer periods of time (i.e. a single exposure being lower than the predetermined threshold). This can be just as hazardous to the person’s health as a single occurrence of exceeding the threshold.
An embodiment relates to an aforementioned method, wherein the sensing device comprises a temperature sensor and a moisture sensor, wherein degradation of the gas sensor is based on temperature and/or moisture readings i.e. the conditions in which the sensing device is being used. The applicant has found that in case the sensing device is being used in e.g. dry areas, the sensors degrade faster (causing the sensing device to give wrong readings), therefore requiring relatively early calibration.
An embodiment relates to an aforementioned method, wherein an alarm is triggered when the person is about to enter a hotspot, to allow the person to avoid the hotspot.
Another aspect of the invention concerns a monitoring system for monitoring gas concentrations at a site, comprising: a sensing device arranged at a measurement position at the site, the sensing device being part of a sniffer system of one or more sensing devices, a communication system for communicating measurement data between the sensing device and a base computer system, wherein the measurement data at least comprises the concentration of at least one gas at the measurement position, an alarm, arranged for being triggered when the gas concentration measured by the sensing device exceeds a predetermined threshold, characterized by a storage system for continuously storing monitoring data, comprising at least the measurement data, and a data analytics system to analyse the stored monitoring data.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be explained hereafter with reference to an exemplary embodiment of a monitoring system and method according to the invention and with reference to the drawing. Therein:
The figure shows a schematic view of an embodiment of a monitoring system and method according to the invention.
DETAILED DESCRIPTION
The figure shows a monitoring system 15 for monitoring gas concentrations, for instance H2S, at a site 2. Apart from H2S, the gases 1 could for instance comprise CO, 02, NOx, et cetera.
As stated before, such a site 2 comprise for instance chemical processing plants, animal fat and oil processing facilities, asphalt storage facilities, blast furnaces, breweries and fermentation process plants, silk processing plants, textile printing facilities, coal gasification plants, coke ovens, mines, fishing vessel holds, geothermal plants, waste processing facilities, paper production facilities, sewage treatment plants (or sewage systems), slaughterhouses, et cetera, et cetera. Merely for illustrative purposes, the figure shows a road running through the site 2 and the upper left corner of the site 2 shows three cylindrical storage tanks, whereas the lower right corner shows a building. The figure shows a pair of sensing devices 3 arranged at two measurement positions 4 at the site 2, the sensing devices 3 being part of a sniffer system, schematically indicated by reference numeral 5. One of the devices is a fixed device 12 and the other device is worn by a person as a personal alarm device 13. A wireless communication system 6 is present for communicating measurement data 7 between the sensing device 3 and a base computer system 8. Although the communication system 6 is indicated by a WiFi symbol, it is not limited to communication merely via WiFi (i.e. the communication system 6 could also comprise other communication means). The presence of gases 1 is indicated by a number of clouds. The measurement data 7 at least comprises the concentration of at least one gas 1 at the measurement position 4. When the gas 1 level at any one of the sensing devices 3 reaches a predetermined threshold, an alarm is triggered -either by the sensing device 3 itself or indirectly via the base computer system 8 - or both. Preferably though, the alarm being triggered is not just limited to a local warning signal. A storage system 9, such as a cloud-based storage system (for instance Microsoft Azure®), is shown for continuously storing the vast amounts of measurement data conveyed by the sensing devices 3 to the base computer system 8. A continuous flow of measurement data 7 (or a “batch-wise” flow, i.e. a continuous flow interrupted at certain intervals) is stored in the storage system 9, along with associated data, such as time, sensing device location, composition of gases and other substances in the air (air quality), sensing device 3 health, et cetera. According to the invention, a data analytics system 14 is provided to analyse the stored monitoring data. Such data analytics system could for instance be arranged on an external server, or be comprised by an ‘app’ installed on a smartphone. Of course, the data analytics system 14, the storage system 9 and the base computer system 8 can be installed in a single physical apparatus (such as the sensing device 3 itself), or can be kept separate. Preferably though, the data analytics system 14, the base computer system 8 and the storage system 9 are kept separate to increase the operational reliability of the monitoring system 15. In an embodiment, the data is stored for 1,2 or more preferably even 3 years.
Preferably, the data analytics step comprises establishing a total exposure of the sensing device 3 to the gas 1 over time based on the continuously stored gas 1 concentration at the measurement position 4. The data analytics step can furthermore be used for identifying hot 10 and cold exposure spots 11 (i.e. high and low concentrations of a certain gas) at the site 2 based on the measurement data 7 of multiple sensing devices 3, 12, 13. Preferably, the monitoring data comprises the time an alarm is triggered and the data analytics step comprises correlating alarms over time to identify problem areas at the site, such as leaks.
Preferably, the communication system 6 comprises LoRa-based or Sigfox-based transmission systems to save energy and to be able to effectively operate in harsh environments. Other low battery power communication systems or other “loT” communication networks, however, are also conceivable. The transmission systems are to be installed in such way that factors like critical site areas, transmission range, required energy, et cetera, are taken into account.
As mentioned before, the sensing device 3 can be constituted by a personal sensing device 13 worn on a body of a person 16 located at the site 2. Preferably, the personal sensing device 3, 13 comprises a gyroscope to measure accelerations on the person’s 16 body, wherein the measured accelerations are used to determine the position of the personal sensing device on the person’s 16 body. A wear alarm is triggered if the personal sensing device 13 is wrongly positioned on the person’s 16 body. Therein, the data analytics step may also comprise establishing a total exposure of the person 16 based on the total exposure of the sensing device 13 to a gas 1 over time, such that the personal sensing device 13 acts as sort of “dosimeter”. Furthermore, the data analytics step can be used to establish further training requirements required by the specific person or, in general, by personnel visiting the site 2. The personal sensing device 13 is preferably resistant to shocks, waterproof (IP57 or IP67), ATEX compliant, lightweight (< 250 grams) and/or relatively small and preferably has clip for quick attachment and release.
The sensing device 3 (either fixed or wearable/portable) is preferably provided with functionality for setting a gas concentration (PPM) threshold for an alarm to be triggered. The alarm preferably is constituted by a sonic alarm ( > 90 dB), vibration, and/or a flashing (LED) light/panel. The PPM threshold may however be overruled by the base computer system 8. Preferably the sensing device’s 3 battery has a life of at least 10 hours. Charging is preferably to be provided by a Micro-USB adapter, or if possible, by solar panels arranged on the sensing device 3.
The data is preferably logged every 30 seconds. Gas concentrations are preferably logged every second. The same holds for position information, such as determined via GPS. Gyroscope information is logged preferably every second, such as angular velocities, minimum accelerations, maximum accelerations.
The sensing device 3 preferably is designed to operate within a temperature range of -40 - 60 °C.
It should be clear that the description above is intended to illustrate the operation of preferred embodiments of the invention, and not to reduce the scope of protection of the invention. Starting from the above description, many embodiments will be conceivable to the skilled person within the inventive concept and scope of protection of the present invention.
LIST OF REFERENCE NUMERALS 1. Gas 2. Site 3. Sensing device 4. Measurement position 5. Sniffer system 6. Communication system 7. Measurement data 8. Base computer system 9. Storage system 10. Hot exposure spot 11. Cold exposure spot 12. Fixed sensing device 13. Personal sensing device 14. Processing unit/data analytics unit 15. Monitoring system 16. Person
Claims (16)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2016828A NL2016828B1 (en) | 2016-05-25 | 2016-05-25 | Method for monitoring gas concentrations at a site |
PCT/NL2017/050338 WO2017204642A1 (en) | 2016-05-25 | 2017-05-26 | Method for monitoring gas concentrations at a site |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2016828A NL2016828B1 (en) | 2016-05-25 | 2016-05-25 | Method for monitoring gas concentrations at a site |
Publications (2)
Publication Number | Publication Date |
---|---|
NL2016828A NL2016828A (en) | 2017-11-30 |
NL2016828B1 true NL2016828B1 (en) | 2017-12-12 |
Family
ID=59270081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL2016828A NL2016828B1 (en) | 2016-05-25 | 2016-05-25 | Method for monitoring gas concentrations at a site |
Country Status (2)
Country | Link |
---|---|
NL (1) | NL2016828B1 (en) |
WO (1) | WO2017204642A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11785186B2 (en) | 2018-07-11 | 2023-10-10 | Total Safety U.S., Inc. | Centralized monitoring of confined spaces |
CA3049058C (en) | 2018-07-11 | 2023-06-06 | Total Safety U.S., Inc. | Centralized monitoring of confined spaces |
CN108798787B (en) * | 2018-07-25 | 2023-08-01 | 山东精诚电子科技有限公司 | Coal mine safety monitoring system and method based on LoRa |
AT521796A1 (en) * | 2018-10-17 | 2020-05-15 | Ait Austrian Inst Tech Gmbh | Procedure for determining the contamination or impairment of people by pollutants |
CN109922428B (en) * | 2019-03-06 | 2021-01-01 | 山东科技大学 | Quick remote location and emergent guarantee system of dangerous gas leakage source |
WO2022006663A1 (en) * | 2020-07-07 | 2022-01-13 | Blackline Safety Corp. | Apparatus and methods for aggregated gas detection |
CN115508258B (en) * | 2022-09-20 | 2023-05-23 | 格瑞利(江苏)智能科技有限公司 | Dust monitoring method and system for building site area |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6252510B1 (en) | 1998-10-14 | 2001-06-26 | Bud Dungan | Apparatus and method for wireless gas monitoring |
US6182497B1 (en) * | 1999-08-20 | 2001-02-06 | Neodym Systems Inc | Gas detection system and method |
US6856253B1 (en) | 2003-08-14 | 2005-02-15 | Gary W. Crook | Personal hydrogen sulfide gas alarm system |
GB2401432B (en) * | 2003-12-09 | 2005-05-04 | Dynament Ltd | Gas sensor |
US8330605B2 (en) * | 2009-08-14 | 2012-12-11 | Accenture Global Services Limited | System for providing real time locating and gas exposure monitoring |
AU2015287352B2 (en) | 2014-07-06 | 2019-09-19 | Usm Holdings Limited | Personal hazard detection system with redundant position registration and communication |
US10416143B2 (en) * | 2015-03-27 | 2019-09-17 | Google Llc | Devices and methods for determining and acting upon cumulative exposure of a building occupant to a hazardous substance |
-
2016
- 2016-05-25 NL NL2016828A patent/NL2016828B1/en active
-
2017
- 2017-05-26 WO PCT/NL2017/050338 patent/WO2017204642A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
NL2016828A (en) | 2017-11-30 |
WO2017204642A1 (en) | 2017-11-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
NL2016828B1 (en) | Method for monitoring gas concentrations at a site | |
CA2734152C (en) | Environmental risk management system and method | |
CA2693097C (en) | Detector system and method to detect or determine a specific gas within a gas mixture | |
CN102007426A (en) | Position-monitoring device for persons | |
JP7060372B2 (en) | Wearable chemical threat detector | |
CN103109311A (en) | A multi-sense environmental monitoring device and method | |
Sharma et al. | Development of an early detection system for fire using Wireless Sensor Networks and Arduino | |
US8836520B1 (en) | Hydrogen sulfide sensor with water detection | |
Krithika et al. | Safety scheme for mining industry using zigbee module | |
Chaturvedi et al. | IoT based wireless sensor network for air pollution monitoring | |
Borkar et al. | IoT based smart helmet for underground mines | |
Sujitha et al. | Iot based smart mine safety system using arduino | |
Shashidhar et al. | Smart Helmet-Early Calamity Prediction and Warning System for Coal Miners | |
Kartik | IOT based Smart Helmet for Hazard Detection in mining industry | |
Paulchamy et al. | An intelligent helmet for miners with air quality and destructive event detection using zigbee | |
Shu et al. | A smart helmet for network level early warning in large scale petrochemical plants | |
CN113075366A (en) | System for integrating multiple chemical sensor data to detect an unmeasured compound | |
KR102171752B1 (en) | Fire detection apparatus having function of estimating degree of fire risk | |
CN207557220U (en) | Toxic and harmful gas network monitor instrument with sensor detecting element | |
ES2644966B1 (en) | System and method of detection and prediction of the evolution of forest fires. | |
Banu et al. | Power Efficient Intelligent Helmet for Coal Mining Security and Alerting | |
KR102346965B1 (en) | Apparatus for measuring soil corrosive factor based on IoT and buried piping information providing system using thereof | |
KR101817341B1 (en) | System for monitoring fire environment in building using elevator | |
KR20230168214A (en) | Gas monitoring and alarm system | |
US20220291186A1 (en) | Process for analyzing data of at least one mobile gas measuring device and of a stationary gas measuring device as well as system for monitoring at least one gas concentration |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PD | Change of ownership |
Owner name: AL3 HOLDING B.V.; NL Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: UREASON NL B.V. Effective date: 20200721 |