US20020084337A1 - Central heating system for heating rooms - Google Patents
Central heating system for heating rooms Download PDFInfo
- Publication number
- US20020084337A1 US20020084337A1 US09/992,477 US99247701A US2002084337A1 US 20020084337 A1 US20020084337 A1 US 20020084337A1 US 99247701 A US99247701 A US 99247701A US 2002084337 A1 US2002084337 A1 US 2002084337A1
- Authority
- US
- United States
- Prior art keywords
- heating
- circuit
- heating system
- flow
- supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D10/00—District heating systems
- F24D10/006—Direct domestic delivery stations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/17—District heating
Definitions
- the invention pertains to a central heating system for heating rooms in one or more buildings with a piping network with supply and return lines, and more particularly to a system having several subcircuits, such as for heating rooms on different floors of a building.
- Known central heating systems generally have a heat source and a pipeline system for transporting a thermal medium to heat individual rooms.
- a thermal medium As a rule, water is used as the thermal medium.
- the pipeline system is composed of several subcircuits which extend, for instance, in individual floors of a multistory building.
- the subcircuits are supplied by vertical lines.
- a subcircuit of the pipeline system consists of separate supply and return lines, at least one line barrier (i.e. check valve and/or back flow preventor) and several heating circuits parallel to one another connected to the supply and return lines.
- a heating circuit can have only one heating element or several heating elements arranged in series and connected via supply and return lines to the supply and return lines of the subcircuit.
- a line barrier is arranged at the start of each subcircuit.
- the line barrier ensures a uniform distribution of water in the subcircuits. It is intended thereby to minimize irregular flow through the heating circuits and thus the heating elements because of, for instance, the long distance from the main vertical supply line or to frictional losses due to pipe curvatures.
- valves specifically, temperature control valves, inserted into the heating circuits.
- the valve aperture and thus the volume flow of thermal medium flowing into the heating circuits or heating elements is regulated by a pressure-sensitive actuator.
- a spring acts in the closing direction on the actuator.
- each heating circuit is assigned a flow limiter, which provides nearly constant pressure in the local heating circuit as it is inserted in the circuit supply or circuit return line, independently of the number of heating elements in the heating circuit.
- a constant pressure level at the valves can thereby be guaranteed in a simple manner.
- a heating circuit contains only one heating element or several heating elements connected in series.
- the flow limiter in the heating circuit may be installed in the supply flow line, optionally upstream or downstream of the temperature control valve, or in the return flow line.
- the flow limiter and the valve may be designed as an integral structural unit.
- the installation site of the flow limiters in the individual heating circuits may be consistent or different for all subcircuits of a heating system.
- the flow limiters are laid out such that an equally large pressure gradient is achieved at all flow limiters, independent of the existing pressure conditions and, in particular, independent of the size, number and construction of the heating elements of a heating circuit. This is important when heating elements of different size, which are supplied differing amounts of thermal medium per unit time, are employed.
- the flow limiter is thus designed in regard to its size as a function of the size of the heating element and as a function of the pressure in the pipeline network.
- FIG. 1 schematically shows a building 2 that has a service room 4 in a basement for accommodating a central heat source 6 and three heated stories 8 a - 8 c , namely ground floor 8 a , first upper floor 8 b and second upper floor 8 c .
- Three subcircuits 12 a , 12 b and 12 c which are part of a central heating system 10 according to the invention, are installed in the building 2 .
- Subcircuit 12 a extends in a ground floor 8 a
- subcircuit 12 c in a second upper floor 8 c.
- each heated story 8 a - 8 c , three heating circuits, a first heating circuit 32 , a second heating circuit 34 and a third heating circuit 36 , are connected to the corresponding subcircuit 12 a , 12 b and 12 c .
- Every heating circuit 32 , 34 and 36 is connected via a supply line 24 to a subcircuit supply line 18 of the associated subcircuit 12 a - 12 c and via a return flow line 30 to a subcircuit return flow line 20 of the associated subcircuit 12 a - 12 c .
- the first two heating circuits 32 and 34 each have one heating element 22
- two heating elements 22 are arranged in series in the third illustrated heating circuit 36 .
- the diameters of supply flow line 18 and return flow line 20 of each subcircuit 12 a - 12 c are identical.
- a temperature control valve 28 for regulating the room temperature is inserted in each supply line 24 of each heating circuit 32 , 34 and 36 .
- the flow limiter 26 is downstream of the temperature valve 28 in the supply line 24 of each heating circuit 32 , 34 and 36 , and in the subcircuit 12 b , the flow limiter 26 is upstream of the temperature control valve 28 in the supply flow line 24 of each heating circuit 32 , 34 and 36 .
- the flow limiter 26 is inserted in the return line 30 of each heating circuit 32 , 34 and 36 and thus downstream of the temperature control valve 28 and the heating element 22 for heating circuit 32 and 34 , or both heating elements 22 , for heating circuit 36 .
Abstract
The invention pertains to a central heating system (10) for heating rooms of one or more buildings (2) with a pipeline network with supply and return lines (18, 20), at least one flow limiter (26) arranged in the pipeline network, a fluid as thermal medium in the pipeline network, several heating circuits (32) each connected to the pipeline network via circuit supply and return lines (24, 30), each circuit having a temperature control valve (28) for regulation/control of room temperature and at least one heating element (22). The invention is characterized in that a flow limiter (26) is inserted into each circuit supply or return line (24, 30), associated with each heating circuit (32).
Description
- The invention pertains to a central heating system for heating rooms in one or more buildings with a piping network with supply and return lines, and more particularly to a system having several subcircuits, such as for heating rooms on different floors of a building.
- Known central heating systems generally have a heat source and a pipeline system for transporting a thermal medium to heat individual rooms. As a rule, water is used as the thermal medium.
- Depending on the complexity of the heating system, the pipeline system is composed of several subcircuits which extend, for instance, in individual floors of a multistory building. The subcircuits are supplied by vertical lines.
- As a rule, a subcircuit of the pipeline system consists of separate supply and return lines, at least one line barrier (i.e. check valve and/or back flow preventor) and several heating circuits parallel to one another connected to the supply and return lines. A heating circuit can have only one heating element or several heating elements arranged in series and connected via supply and return lines to the supply and return lines of the subcircuit.
- In the subcircuit supply line, a line barrier is arranged at the start of each subcircuit. The line barrier ensures a uniform distribution of water in the subcircuits. It is intended thereby to minimize irregular flow through the heating circuits and thus the heating elements because of, for instance, the long distance from the main vertical supply line or to frictional losses due to pipe curvatures.
- The regulation or control of desired room temperature is accomplished by way of valves, specifically, temperature control valves, inserted into the heating circuits. The valve aperture and thus the volume flow of thermal medium flowing into the heating circuits or heating elements is regulated by a pressure-sensitive actuator. A spring acts in the closing direction on the actuator.
- Known central heating systems have the disadvantage that the installed circuit barriers produce pressure gradients of varying magnitudes independently of the flow amount. Consequently, the hysteresis of the valves increases or is displaced, and therefore, the individual temperature settings of the individual rooms cannot be guaranteed.
- If the central heating system is operating in the full load range, then there is a high flow velocity of the thermal medium in the pipeline system. Associated with this high flow velocity, however, is a high pressure gradient at the circuit barriers. This has the consequence that a smaller differential pressure is present at the temperature control valves for controlling the flow of the thermal medium and thus a larger differential force consisting of differential pressure and spring force acts in the closing direction on the actuator. The actuator is consequently pressed in the closing direction, so that the volume flow of thermal medium decreases. The premature valve closure induced thereby has the result that the room temperature set/desired at the valves is not reached. In order to reach the desired room temperature nonetheless, manual readjustment of the valves is required, which is linked to increased energy consumption and increasing costs.
- A similar phenomenon occurs in the partial load range of the central heating unit. Because of the then prevailing low flow velocity of the thermal medium, only a small pressure gradient can be observed at the circuit barriers. This has the consequence that a higher pressure is present at the temperature control valves located in the heating circuits and therefore a lower differential pressure acts in the closing direction on the actuator. The actuator is thereby pressed less in the closing direction. Because of the elevated pressure, the temperature control valves close with a temporal offset, that is to say, at higher room temperatures. This is once again associated with elevated energy consumption and rising costs.
- The invention is based on the problem of refining a central heating unit for heating rooms according to the type specified above such that energy savings are achieved by avoiding the aforementioned disadvantages with a simple design.
- This problem is solved by the present invention which is based on the insight that, by setting a nearly constant pressure level in the pipeline system of the heating system, particularly at the temperature control valves, large energy savings and a reduction of operating costs are possible.
- According to the invention, therefore, each heating circuit is assigned a flow limiter, which provides nearly constant pressure in the local heating circuit as it is inserted in the circuit supply or circuit return line, independently of the number of heating elements in the heating circuit. A constant pressure level at the valves can thereby be guaranteed in a simple manner.
- In order to ease the design of larger heating systems consisting of vertical lines and several subcircuits, the installation of flow limiters is now done exclusively in the supply and return lines of each heating circuit. The circuit barriers previously utilized are now unnecessary.
- It is of no consequence whether a heating circuit contains only one heating element or several heating elements connected in series. The flow limiter in the heating circuit may be installed in the supply flow line, optionally upstream or downstream of the temperature control valve, or in the return flow line.
- Depending on the embodiment of the invention, the flow limiter and the valve may be designed as an integral structural unit.
- The flow limiters are designed so that an equally large pressure gradient is achieved at all flow limiters, independently of the existing pressure conditions and, in particular, independently of the size, number and construction of the heating element in a heating circuit.
- The installation site of the flow limiters in the individual heating circuits may be consistent or different for all subcircuits of a heating system.
- So that good maintenance of the system can be assured, it is preferred that the flow limiters are interchangeable throughout the pipeline network.
- According to one embodiment of the invention, the flow limiters are laid out such that an equally large pressure gradient is achieved at all flow limiters, independent of the existing pressure conditions and, in particular, independent of the size, number and construction of the heating elements of a heating circuit. This is important when heating elements of different size, which are supplied differing amounts of thermal medium per unit time, are employed. The flow limiter is thus designed in regard to its size as a function of the size of the heating element and as a function of the pressure in the pipeline network.
- Additional characteristics and advantages may be deduced from the description below of an embodiment of the invention in conjunction with the drawing.
- FIG. 1 is a schematic circuit diagram of a central heating system according to the invention in a building consisting of several floors.
- FIG. 1 schematically shows a
building 2 that has aservice room 4 in a basement for accommodating acentral heat source 6 and threeheated stories 8 a-8 c, namely ground floor 8 a, firstupper floor 8 b and second upper floor 8 c. Threesubcircuits central heating system 10 according to the invention, are installed in thebuilding 2.Subcircuit 12 a extends in a ground floor 8 a,subcircuit 12 b in a firstupper floor 8 b, andsubcircuit 12 c in a second upper floor 8 c. - Subcircuits12 a-12 c each have a subcircuit
supply flow line 18 and a subcircuitreturn flow line 20 which run separately. Subcircuits 12 a-12 c are connected to thecentral heat source 6 viavertical supply line 14 andvertical return line 16, each subcircuit also having a subcircuit supply line and a subcircuit return flow line. - In each heated story,8 a-8 c, three heating circuits, a
first heating circuit 32, asecond heating circuit 34 and athird heating circuit 36, are connected to thecorresponding subcircuit heating circuit supply line 24 to asubcircuit supply line 18 of the associated subcircuit 12 a-12 c and via areturn flow line 30 to a subcircuitreturn flow line 20 of the associated subcircuit 12 a-12 c. While the first twoheating circuits heating element 22, twoheating elements 22 are arranged in series in the third illustratedheating circuit 36. The diameters ofsupply flow line 18 andreturn flow line 20 of each subcircuit 12 a-12 c are identical. - A
temperature control valve 28 for regulating the room temperature is inserted in eachsupply line 24 of eachheating circuit - A
flow limiter 26 is installed in thesupply line 24 or thereturn line 30 of eachheating circuit 32. The installation site of theflow limiter 26 in thesupply line 24 or thereturn line 30 of eachheating circuit subcircuit subcircuits subcircuit 12 a, theflow limiter 26 is downstream of thetemperature valve 28 in thesupply line 24 of eachheating circuit subcircuit 12 b, theflow limiter 26 is upstream of thetemperature control valve 28 in thesupply flow line 24 of eachheating circuit subcircuit 12 c, theflow limiter 26 is inserted in thereturn line 30 of eachheating circuit temperature control valve 28 and theheating element 22 forheating circuit heating elements 22, forheating circuit 36. - In the
temperature control valves 28 that are opened in the majority of cases, for instance, differentially high flow velocities of the thermal medium occur in thecentral heating system 10. By providingflow limiters 26 insupply flow lines 24 orreturn flow lines 30 of eachheating circuit central heating system 10 results. Because of the essentially constant flow velocities, pressure fluctuations inside the pipeline system of thecentral heating system 10 are avoided, in particular, in thesupply flow lines 24 and thereturn flow lines 30 of eachheating circuit temperature control valves 28. Consequently the hysteresis of thetemperature control valves 28 with respect to one another remains unchanged. This has the advantage that the room temperature is more precisely regulated and thus manual resetting of the room temperature is no longer necessary; consequently energy savings are achieved. - The invention is characterized in that considerable energy can be saved by the installation of flow limiters in individual heating circuit
supply flow lines 24, optionally upstream or downstream of thetemperature control valve 28, or in the individual heating circuitreturn flow line 30 of eachheating circuit
Claims (14)
1. A central heating system (10) for heating rooms in one or more buildings (2) with a pipeline network having supply and return pipelines (18, 20), at least one flow limiter (26) arranged in the pipeline network, a fluid thermal medium located in the pipeline network, a plurality of heating circuits (32) each connected to the pipeline network in parallel to each other via circuit supply and return lines (24, 30), each circuit having a valve (28) for regulation/control of room temperature and at least one heating element (22), characterized in that a flow limiter (26) is inserted into the circuit supply or return line (24, 30), and is associated with each heating circuit (32).
2. The central heating system according to claim 1 , characterized in that the pipeline network consists of a plurality of subcircuits (12 a, 12 b, 12 c), arranged on different floors (8 a, 8 b, 8 c) of a building (2), to which a plurality of subcircuit heating circuits (32) are connected in parallel to each other.
3. The central heating system according to claim 2 , characterized in that the plurality of subcircuits (12 a, 12 b, 12 c) are supplied via vertical supply and vertical return lines (14, 16).
4. The central heating system according to claim 1 , characterized in that the flow limiters (26) are inserted exclusively into the circuit supply or return lines (24, 30) of each heating circuit (32).
5. The central heating system according to claim 1 , characterized in that the flow limiter (26) is installed in a supply line (24) of a heating circuit (32).
6. The central heating system according to claim 5 , characterized in that the flow limiter (26) is located upstream of the valve (28).
7. The central heating system according to claim 5 , characterized in that the flow limiter (26) is located downstream of the valve (28).
8. The central heating system according to claim 1 , characterized in that the flow limiter (26) is installed in the circuit return line (30) of a heating circuit (32).
9. The central heating system according to claim 2 , characterized in that an installation site of each flow limiter (26) in the circuit supply or return lines (24, 30) of the heating circuits (32) is uniform for all heating circuits (32) of a subcircuit (12 a, 12 b, 12 c).
10. The central heating system according to claim 9 , characterized in that the installation site of each flow limiter (26) in the circuit supply or return line (24, 30) of the heating circuits (32) is different in at least two subcircuits (12 a, 12 b, 12 c).
11. The central heating system according to one of claim 1 , characterized in that an installation site of the flow limiters (26) in the circuit supply or return outflow line (24, 30) of the heating circuits (32) is uniform for all heating circuits (32) in the pipeline network.
12. The central heating system according to claim 1 , characterized in that the flow limiters (26) are interchangeable in the pipeline network.
13. The central heating system according to claim 1 , characterized in that the valve (28) and the flow limiter (26) form an integral structural unit.
14. The central heating system according to claim 1 , characterized in that the flow limiters (26) provide an equally large pressure gradient at all flow limiters (26), independent of the existing pressure condition and independent of the size, number and construction of the heating elements (22) of a heating circuit (32).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE100570416.5 | 2000-11-20 | ||
DE10057410A DE10057410C1 (en) | 2000-11-20 | 2000-11-20 | Central cooling and/or heating device for building has flow valve controlled by pressure difference between feed and return flows for pressure stabilisation |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020084337A1 true US20020084337A1 (en) | 2002-07-04 |
Family
ID=7663900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/992,477 Abandoned US20020084337A1 (en) | 2000-11-20 | 2001-11-19 | Central heating system for heating rooms |
Country Status (8)
Country | Link |
---|---|
US (1) | US20020084337A1 (en) |
EP (1) | EP1207355B1 (en) |
AT (1) | ATE383548T1 (en) |
DE (2) | DE10057410C1 (en) |
DK (1) | DK1207355T3 (en) |
ES (1) | ES2299459T3 (en) |
PT (1) | PT1207355E (en) |
SI (1) | SI1207355T1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080098968A1 (en) * | 2006-10-27 | 2008-05-01 | John Yuming Liu | Heat recovery and heat dissipated from the heat harvesting coil |
US20080271881A1 (en) * | 2007-05-01 | 2008-11-06 | Blecker Joseph G | Automatic Switching Two Pipe Hydronic System |
US20110100497A1 (en) * | 2008-06-07 | 2011-05-05 | Uponor Innovation Ab | Pipe arrangement for temperature control of buildings |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004017593B3 (en) * | 2004-04-07 | 2005-11-03 | Albert Bauer | Cooling and / or heating device |
RU2568097C1 (en) * | 2014-06-17 | 2015-11-10 | Петр Анатольевич Прусов | Heating system with energy-independent mode for two, three, four storeys, with connection of heat-insulated floor, using multilayered water flows for circulation |
RU2568177C1 (en) * | 2014-05-12 | 2015-11-10 | Петр Анатольевич Прусов | Heating system with energy-independent mode for four storeys using multilayered water flows for circulation |
RU2570306C2 (en) * | 2014-04-15 | 2015-12-10 | Петр Анатольевич Прусов | Energy-independent heating system for three storeys, using multilayer water flows to ensure circulation |
EP3133351B1 (en) * | 2014-04-15 | 2021-05-05 | Prusov, Petr Anatolyevich | Heating system with energy-independent mode using multiple-layer streams of water |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1054688B (en) * | 1953-02-26 | 1959-04-09 | Erich Strempel | District heating system with water as a heat carrier in a closed circuit and with directly connected house systems |
DE1197208B (en) * | 1961-01-31 | 1965-07-22 | Karl Bormann Dipl Ing | Collective heating with direct connection to a district water heating system |
DE1253429B (en) * | 1964-05-02 | 1967-11-02 | Samson Appbau A G | Control device for heating systems, especially those that are fed from a district heating network |
US4019681A (en) * | 1975-02-19 | 1977-04-26 | Josef Dumser | Thermal distributing unit |
US4065055A (en) * | 1976-01-14 | 1977-12-27 | Cosimo Michael J De | Complete system for a home air heating and cooling, hot and cold water, and electric power |
DE3310214A1 (en) * | 1983-03-21 | 1984-09-27 | Loewe Pumpenfabrik GmbH, 2120 Lüneburg | Control system for heating installations and the like |
DE3340351A1 (en) * | 1983-11-08 | 1985-05-23 | Claus 8176 Waakirchen Dreifke | Circuit-separation heating system with controllable circulation |
SE8404711L (en) * | 1984-09-20 | 1986-03-17 | Olsson & Nilsson Energikonsult | POWER SOURCE LIMIT FOR SUBSCRIPTION CENTER FOR REMOTE HEATING SYSTEM |
DK160648B (en) * | 1988-08-05 | 1991-04-02 | Frese Armatur | PROCEDURE FOR REGULATING A CENTRAL OR REMOVAL HEATING SYSTEM WITH A DIFFERENCE PRESSURE VALVE AND PLANT FOR USE THEREOF |
GB9409022D0 (en) * | 1994-05-06 | 1994-06-22 | Inter Albion Ltd | Flow control system |
FR2724160B1 (en) * | 1994-09-07 | 1997-01-17 | Comap | INSTALLATION FOR DISTRIBUTING A FLUID CIRCULATING IN A CLOSED CIRCUIT, WITH REGULATION, AND METHOD FOR ADJUSTING THE SAME |
DE19732165B4 (en) * | 1996-07-30 | 2007-04-05 | Denso Corp., Kariya | Hot water heater |
DE19654955C2 (en) * | 1996-12-27 | 2000-11-16 | Albert Bauer | Air conditioning device |
DE19914103C2 (en) * | 1999-03-22 | 2003-04-10 | Ingo Bruchhold | Ventilation and heating system |
DE19960527C1 (en) * | 1999-12-15 | 2001-05-31 | Samson Ag | Domestic installation for room heating and drinking water preparation has flow regulator controlling flow through room heating circuit and water heating circuit and differential pressure regulator |
-
2000
- 2000-11-20 DE DE10057410A patent/DE10057410C1/en not_active Expired - Fee Related
-
2001
- 2001-11-09 EP EP01126465A patent/EP1207355B1/en not_active Expired - Lifetime
- 2001-11-09 DE DE50113467T patent/DE50113467D1/en not_active Expired - Lifetime
- 2001-11-09 DK DK01126465T patent/DK1207355T3/en active
- 2001-11-09 ES ES01126465T patent/ES2299459T3/en not_active Expired - Lifetime
- 2001-11-09 SI SI200130819T patent/SI1207355T1/en unknown
- 2001-11-09 AT AT01126465T patent/ATE383548T1/en active
- 2001-11-09 PT PT01126465T patent/PT1207355E/en unknown
- 2001-11-19 US US09/992,477 patent/US20020084337A1/en not_active Abandoned
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080098968A1 (en) * | 2006-10-27 | 2008-05-01 | John Yuming Liu | Heat recovery and heat dissipated from the heat harvesting coil |
US20080271881A1 (en) * | 2007-05-01 | 2008-11-06 | Blecker Joseph G | Automatic Switching Two Pipe Hydronic System |
US8141623B2 (en) | 2007-05-01 | 2012-03-27 | Blecker Joseph G | Automatic switching two pipe hydronic system |
US20110100497A1 (en) * | 2008-06-07 | 2011-05-05 | Uponor Innovation Ab | Pipe arrangement for temperature control of buildings |
Also Published As
Publication number | Publication date |
---|---|
PT1207355E (en) | 2008-04-18 |
DK1207355T3 (en) | 2008-05-13 |
DE10057410C1 (en) | 2002-04-25 |
ATE383548T1 (en) | 2008-01-15 |
EP1207355A3 (en) | 2004-06-30 |
EP1207355B1 (en) | 2008-01-09 |
ES2299459T3 (en) | 2008-06-01 |
DE50113467D1 (en) | 2008-02-21 |
EP1207355A2 (en) | 2002-05-22 |
SI1207355T1 (en) | 2008-08-31 |
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Legal Events
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STCB | Information on status: application discontinuation |
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