GB2317680A - An ice bank cooler system - Google Patents
An ice bank cooler system Download PDFInfo
- Publication number
- GB2317680A GB2317680A GB9619960A GB9619960A GB2317680A GB 2317680 A GB2317680 A GB 2317680A GB 9619960 A GB9619960 A GB 9619960A GB 9619960 A GB9619960 A GB 9619960A GB 2317680 A GB2317680 A GB 2317680A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tank
- product
- water
- ice bank
- coil
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/08—Details
- B67D1/0857—Cooling arrangements
- B67D1/0858—Cooling arrangements using compression systems
- B67D1/0861—Cooling arrangements using compression systems the evaporator acting through an intermediate heat transfer means
- B67D1/0865—Cooling arrangements using compression systems the evaporator acting through an intermediate heat transfer means by circulating a cooling fluid along beverage supply lines, e.g. pythons
- B67D1/0867—Cooling arrangements using compression systems the evaporator acting through an intermediate heat transfer means by circulating a cooling fluid along beverage supply lines, e.g. pythons the cooling fluid being a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
- F25D31/002—Liquid coolers, e.g. beverage cooler
- F25D31/003—Liquid coolers, e.g. beverage cooler with immersed cooling element
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
An ice bank cooler system has a chilled water tank. An evaporator coil (4) is mounted on the inner side wall of the tank spaced inwardly from the inner sidewall. The evaporator coil (4) is operable to form an ice bank within the tank spaced inwardly of the sidewalls. An agitator paddle (25) circulates water in the tank downwardly along an inner face of the ice bank and then upwardly along an outer face of the ice bank between the ice bank and the inner sidewall of the tank. Product cooling coils (5) extend into the tank for circulating a product such as beer through chilled water in the tank. A cooling water circulating pump (37) is operable to circulate cooling water from the tank through a cooling water pipe mounted in a python (41) with product delivery coils, the python (41) delivering the product from the tank to a dispenser. A temperature sensor at the dispenser senses the water temperature for controlling agitation and circulation of water in the system to achieve a desired product discharge temperature.
Description
"An Ice Bank Cooler System Introduction
This invention relates to an ice bank cooler system.
The invention is particularly concerned with the chilling of beers and the like beverages in public houses, hotels, restaurants and the like. Ice banks have been widely used for some time in the chilling of such beverages. One typical type of ice bank has a tank within which an evaporator coil of a refrigeration system forms an ice bank on the inside faces of the tank sidewalls with a chilled water bath within the ice bank. The beverage to be chilled is passed through product coils which are submerged in the chilled water bath to cool the beverage prior to delivery to a dispensing tap or the like. Typically, demand for any particular product varies considerably at different times during the day.
Problems can arise in maintaining the product at a desired dispensing temperature over the wide range of demand typically encountered and the product temperature may rise when demand is high.
The present invention is directed towards overcoming these problems.
According to the invention, there is provided an ice bank cooler system, comprising :
a thermally insulated chilled water tank having a
base with upstanding sidewalls extending around the
base and a cover seated on the sidewalls;
In a preferred embodiment, the evaporator mounting means comprises a number of spacers mounted on the evaporator coil and extending outwardly from the coil to engage the sidewalls. Conveniently, each spacer is V-shaped in section having a number of vertically spaced-apart coil receiving slots along an apex of the spacer, with a coil retaining pin engaging within the apex passing across a mouth of each slot to retain the coil within the slots. This construction of spacer is particularly convenient from a manufacturing point of view as it is readily easily and quickly mounted on the evaporator coil. Further, the spacers keep windings of the coil spaced-apart a desired amount for evenly forming an ice bank within the tank.
The invention will be more clearly understood by the following description of some embodiments thereof, given by way of example only, with reference to the accompanying drawings, in which
Fig. 1 is a perspective view of an ice bank cooler
according to the invention;
Fig. 2 is a plan view of the cooler with a cover of the
cooler removed;
Fig. 3 is a schematic sectional elevational view of the
cooler;
Fig. 4 is a schematic end sectional elevational view of
the cooler;
Fig. 5 is a detail partially cut-away perspective view
showing portion of the cooler;
Fig. 6 is a detail perspective view illustrating an
evaporator coil mounting arrangement for the cooler;
and
Fig. 7 is a view similar to Fig. 3 of another ice bank
cooler system.
Referring to the drawings, there is illustrated an ice bank cooler system according to the invention indicated generally by the reference numeral 1. The cooler 1 has a thermally insulated chilled water tank 2 mounted on a support frame 3.
An evaporator coil 4 is mounted within the tank 2 for forming an ice bank within the tank 2. A number of product coils 5 are mounted within the tank 2, each coil 5 for cooling a product, such as beer, which is passed through the coil 5 which is submerged within a chilled water bath within the tank 2 to cool the beer to a desired temperature prior to delivery to a product dispenser.
The tank 2 has a rectangular base 10 with upstanding side walls 11 on the base and a cover 12 sitting on the side walls. The base 10 and side walls 11 contain insulating foam material.
It will be noted that the evaporator coil 4 extends around the side walls 11 and is spaced-apart inwardly from the side walls 11 by spacers 15 which support the evaporator coil spaced-apart inwardly a preset desirable distance from the sidewalls 11. Each of the spacers 1S is V-shaped in section being formed by a bent plate 16, free edges 17 of which engage against an inner face 18 of the side walls 11. A row of vertically spaced-apart slots 19 are formed at an apex at the inner end of each spacer 15 for reception of the coil 4.
Locking pins 20 retain the coil 4 within the slots 19.
A sensor 22 is mounted on the coil 4 and connected to a controller 23. The sensor 22 is set in conjunction with the controller 23 which regulates the operation of a refrigeration system (not shown) for operation of the evaporator 4 to form an ice-bank of a desired thickness on the evaporator coil 4. It will be noted that the ice bank is formed such that a gap is left between an outer face of the ice bank and the inside face 18 of the sidewalls 11 for circulation of cooling water between the ice bank and the sidewalls 11 of the tank 2. In some cases two or more evaporator coil may be provided.
An agitator paddle 25 is carried on a drive shaft 26 driven by a motor 27 mounted on the cover 12. The paddle 25 is mounted within the tank 2 for circulating water contained within the tank 2 downwardly over an inside face of the ice bank and upwardly between the ice bank and the inside face 18 of the sidewalls 11. In some cases two or more paddles may be provided.
As can be seen in Figs. 3 and 4, a plurality of product coils 5 are mounted within the tank 2. It will be noted from Fig.
4 that each product coil 5 is formed by a pipe wound back and forth in a planar configuration. This arrangement of product coil 5 ensures good circulation of cooling water from the tank 2 around each coil 5 for optimum heat transfer and cooling. A number of coils 5 are arranged in three banks of coils within the tank 2. Various numbers of coils and banks of coils may be provided depending on the particular application for which the system is to be used.
Mounted on the base 10 of the tank 2 is a guide frame 34 for supporting the banks of product cooling coils 5 spaced-apart from the ice bank and from the agitator paddle 25. The evaporator coil spacers 15 are attached at their lower ends to the guide frame 34.
Referring to Figs. 3 and 4, a cooling water circulation pump 37 is mounted on the frame 3 beneath the tank 2 having an inlet pipe 38 in the base 10 and an outlet pipe 39 which passes up through the tank 2 to a cooling water discharge manifold 40 for delivery of cooling water through a "python" 41 through which product delivery lines pass for delivery of a product such as beer from an outlet of a product coil 5 to a dispensing tap (not shown). The python 41 comprises a bundle of product delivery pipes and cooling water supply and return pipes held together within a thermally insulating sheath or cover. A water return line 42 connects to a water return manifold 43 mounted on the cover 12 and extending into the tank 2 having a plurality of outlet holes 44 to direct the cooling water outwardly against the ice bank to promote rapid cooling of the relatively warm cooling water returned from the dispensing tap.
A temperature sensor 46 (Fig. 3) is mounted at the dispensing tap to sense the temperature of the cooling water, the sensor 46 being connected to the controller 23 for controlling agitation and circulation of water in the system and hence the temperature of the cooling water within the tank 2 in response to the sensed water temperature to achieve a desired product dispensing temperature.
A pair of water temperature probes 50,51 are mounted within the water bath in the tank 2 for sensing the temperature of the water bath. Each sensor 50,51 is connected to the controller 23. A first sensor 50 is operable if desired to control the operation of the refrigeration system in response to the sensed water temperature and/or to control agitation and circulation of water in the system. The second sensor 51 is operable to cut out the water circulating pump 37 and agitator paddle in the event that the temperature of the water within the bath 2 rises to a preset maximum temperature such as 7"C for example. This prevents running of the pump 37 and agitator in the event of failure of the refrigeration system to minimise the rate at which the water temperature rises. Each of the sensors 50,51 is mounted within an associated sheath 52,53 (Fig. 2) attached to an exterior of the discharge pipe 39 of the pump 37.
In use, the tank 2 is filled with water and the refrigeration system is operated to form an ice bank on the evaporator coil 4 in the tank 2 spaced-apart inwardly from the sidewalls 11 of the tank 2. The agitator 25 is operated to circulate water within the tank 2 downwardly over an inner surface of the ice bank, underneath the ice bank and up over an outer surface of the ice bank for maintaining an even water temperature within the tank 2. Products such as beer are circulated through the product coils 5 for cooling the products to a desired temperature, the products then being delivered through the python 41 to dispensing taps (not shown). To keep the product chilled during delivery from the tank 2 to the dispensing tap, water from the tank 2 is delivered through the python 41 by means of the pump 37, being circulated through the python 41 and back to the cooling water return manifold 43 for injection into the tank 2 against the ice bank.
It will be noted that the formation of the ice bank spacedapart inwardly from the sidewalls and the circulation of the cooling water by the agitator within the tank ensures good heat transfer between the ice bank and the cooling water and an even cooling water temperature throughout the tank.
Further, the arrangement of the product cooling coils is such as to promote rapid and effective heat transfer from the product to the cooling water for cooling the product to a desired temperature. The product when discharged from the tank is maintained at the desired temperature by the circulation of the cooling water in the python. The configuration of the product cooling coils also assists in the optimum use of the space within the tank. It will be noted that the product cooling coils are maintained separated from the evaporator coil and the agitator by means of the guide frame 34 to allow good circulation of cooling water all around the product coils 5.
Referring now to Fig. 7 there is illustrated another ice bank cooler system indicated generally by the reference numeral 60. This is generally similar to the ice bank cooler system described previously and like parts are assigned to the same reference numerals. In this case the water return manifold 43 extends downwardly to the guide frame 34 which effectively forms a distributor for the returning cooling water. A number of spaced-apart outlet holes 62 are arranged around the tubular guide frame 34 for discharging the cooling water outwardly bringing it in direct contact with the outer wall of the ice bank for improved chilling efficiency.
It will be appreciated that in some cases a twin evaporator may be provided in the tank and twin water circulating bumps may be provided, one of the pumps being run while the other acts as a standby.
Further, various arrangements of numbers of product coils and banks of products coils may be provided with the guide frame being adapted accordingly to keep the product coils spaced-apart from the ice bank during use.
The invention is not limited to the embodiment hereinbefore described, which may be varied in both construction and detail.
Claims (10)
1. An ice bank cooler system comprising a thermally insulated chilled water tank having a
base with upstanding sidewalls extending around the
base and a cover seated on the sidewalls;
an evaporator coil mounted in the tank, the
evaporator coil having an inlet and an outlet for
connection to a refrigeration system;
evaporator mounting means for supporting the
evaporator coil in the tank extending around the
sidewalls of the tank and spaced inwardly of the
sidewalls a preset distance;
means for controlling the refrigeration apparatus
for regulating the thickness of ice deposited on
the evaporator coil for forming an ice bank of a
desired thickness on the evaporator coil spaced
inwardly of the sidewalls;
an agitator paddle mounted within the tank and
connected to associated drive means, the agitator
paddle being operable to circulate cooling water
in the tank along an inner face of the ice bank and
then along an outer face of the ice bank;
a number of separate product cooling coils
extending into the tank within the evaporator coil,
each product cooling coil having an inlet for
connection to a product supply source and an outlet
for connection to a product dispenser, each product
cooling coil being formed by a pipe wound back and
forth in a planar configuration;
and means for retaining the product cooling coils
spaced inwardly of the evaporator coil by a preset
desirable distance.
2. A cooler system as claimed in claim 1 wherein the tank
has a cooling water discharge manifold and a cooling
water return manifold, said manifolds for connection to
each end of a cooling water pipe for cooling product
delivery lines extending between the product cooling
coil outlets and their associated product dispensers,
and a cooling water circulating pump having an inlet
connected to the tank and an outlet communicating with
the water discharge manifold.
3. A cooler system as claimed in claim 2 wherein the water
return manifold extends into the tank, terminating in
a distributor for directing incoming cooling water
towards the ice bank.
4. A cooler system as claimed in any preceding claim
wherein a temperature sensor is provided for mounting
at a product dispenser, said sensor being connected to
a controller for regulating agitation and circulation
of water in the system in response to the sensed water
temperature at the product dispenser.
5. A cooler system as claimed in any preceding claim
wherein an ice sensor is mounted on the evaporator coil
for sensing when the ice bank reaches a desired
thickness, the ice sensor being connected to a
controller for regulating operation of the refrigeration
system in response to the sensed ice thickness.
6. A cooler system as claimed in any preceding claim
wherein a water temperature sensor is mounted within
the tank and is connected to a controller operable for
regulating operation of the refrigeration system in
response to sensed water temperature in the tank.
7. A cooler system as claimed in any of claims 2 to 6
wherein a water temperature sensor is mounted in the
tank and connected to a controller for regulating
operation of the water circulating pump in response to
sensed water temperature within the water tank.
8. A cooler system as claimed in any preceding claim
wherein the evaporator mounting means comprises a number
of spacers mounted on the evaporator coil and extending
outwardly from the coil to engage the sidewalls.
9. A cooler system as claimed in claim 8 wherein each
spacer is V-shaped in section having a number of spaced
apart coil receiving slots along an apex of the spacer,
with a coil retaining pin engaging within the apex
passing across a mouth of each slot to retain the coil
within the slots.
10. An ice bank cooler system substantially as hereinbefore
described with reference to the accompanying drawings.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE960664 IES70737B2 (en) | 1996-09-20 | 1996-09-20 | An ice bank cooler system |
GB9619960A GB2317680B (en) | 1996-09-20 | 1996-09-25 | An ice bank cooler system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE960664 IES70737B2 (en) | 1996-09-20 | 1996-09-20 | An ice bank cooler system |
GB9619960A GB2317680B (en) | 1996-09-20 | 1996-09-25 | An ice bank cooler system |
Publications (4)
Publication Number | Publication Date |
---|---|
GB9619960D0 GB9619960D0 (en) | 1996-11-13 |
GB2317680A true GB2317680A (en) | 1998-04-01 |
GB2317680B GB2317680B (en) | 2000-05-17 |
GB2317680A9 GB2317680A9 (en) | 2000-06-20 |
Family
ID=26310098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9619960A Expired - Fee Related GB2317680B (en) | 1996-09-20 | 1996-09-25 | An ice bank cooler system |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2317680B (en) |
IE (1) | IES70737B2 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000025074A1 (en) * | 1998-10-28 | 2000-05-04 | Imi Cornelius (Uk) Limited | Beverage cooling |
GB2349201A (en) * | 1999-03-18 | 2000-10-25 | Imi Cornelius | Ice bank cooler |
WO2002084188A1 (en) * | 2001-04-12 | 2002-10-24 | Hartek Beverage Handling Gmbh | Beverage cooling device |
GB2450925A (en) * | 2007-07-12 | 2009-01-14 | Innserve Ltd | An Ice Bank Cooler with a Coolant Freezing Below the Freezing Point of Water |
GB2471159A (en) * | 2009-10-30 | 2010-12-22 | Sr Malachy Scott | Single tank beverage and ice tower cooler |
EP2295369A1 (en) | 2006-07-08 | 2011-03-16 | IMI Cornelius (UK) Limited | Ice bank cooler |
WO2014009752A1 (en) * | 2012-07-12 | 2014-01-16 | Imi Cornelius (Uk) Limited | Beverage dispense systems |
CN106247738A (en) * | 2016-08-01 | 2016-12-21 | 张家港市三联化工科技有限公司 | 5 DEG C of recirculated cooling water devices in cryogenic distillation apparatus |
CN110864491A (en) * | 2018-08-27 | 2020-03-06 | 广东美的白色家电技术创新中心有限公司 | Refrigerator with a door |
GR1009823B (en) * | 2019-11-06 | 2020-09-24 | Αναστασιος Δημητριου Καλλιτσης | Device for fast the cooling of beverages |
US10793413B2 (en) | 2015-05-05 | 2020-10-06 | Cornelius Beverage Technologies Limited | Coolant recirculation apparatus for a beverage dispense system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3140244B1 (en) * | 2014-05-06 | 2021-03-31 | Manitowoc Foodservice Companies, LLC | Modular beverage cooling system |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1358415A (en) * | 1971-09-03 | 1974-07-03 | Kawai T | Cooling systems for dringing fluids |
GB2007820A (en) * | 1977-08-22 | 1979-05-23 | Marston Paxman Ltd | Beer cooler |
GB2192261A (en) * | 1986-06-09 | 1988-01-06 | Mkr Holdings Ltd | Liquid cooling apparatus |
GB2205638A (en) * | 1987-06-06 | 1988-12-14 | Imi Cornelius | Cooling beverages |
GB2208536A (en) * | 1987-07-31 | 1989-04-05 | Imi Cornelius | Beverage cooler |
GB2208918A (en) * | 1987-08-19 | 1989-04-19 | Imi Cornelius | Beverage cooling system |
GB2227085A (en) * | 1988-11-16 | 1990-07-18 | Imi Cornelius | A beverage or beverage component cooling and pumping system |
GB2289937A (en) * | 1994-06-02 | 1995-12-06 | Imi Cornelius | Chillers for supplying cold water |
-
1996
- 1996-09-20 IE IE960664 patent/IES70737B2/en not_active IP Right Cessation
- 1996-09-25 GB GB9619960A patent/GB2317680B/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1358415A (en) * | 1971-09-03 | 1974-07-03 | Kawai T | Cooling systems for dringing fluids |
GB2007820A (en) * | 1977-08-22 | 1979-05-23 | Marston Paxman Ltd | Beer cooler |
GB2192261A (en) * | 1986-06-09 | 1988-01-06 | Mkr Holdings Ltd | Liquid cooling apparatus |
GB2205638A (en) * | 1987-06-06 | 1988-12-14 | Imi Cornelius | Cooling beverages |
GB2208536A (en) * | 1987-07-31 | 1989-04-05 | Imi Cornelius | Beverage cooler |
GB2208918A (en) * | 1987-08-19 | 1989-04-19 | Imi Cornelius | Beverage cooling system |
GB2227085A (en) * | 1988-11-16 | 1990-07-18 | Imi Cornelius | A beverage or beverage component cooling and pumping system |
GB2289937A (en) * | 1994-06-02 | 1995-12-06 | Imi Cornelius | Chillers for supplying cold water |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000025074A1 (en) * | 1998-10-28 | 2000-05-04 | Imi Cornelius (Uk) Limited | Beverage cooling |
GB2343243B (en) * | 1998-10-28 | 2003-01-15 | Imi Cornelius | Beverage cooling |
ES2191549A1 (en) * | 1998-10-28 | 2003-09-01 | Imi Cornelius Uk Ltd | Beverage cooling |
GB2349201A (en) * | 1999-03-18 | 2000-10-25 | Imi Cornelius | Ice bank cooler |
GB2349201B (en) * | 1999-03-18 | 2001-03-28 | Imi Cornelius | Beverage cooling |
WO2002084188A1 (en) * | 2001-04-12 | 2002-10-24 | Hartek Beverage Handling Gmbh | Beverage cooling device |
EP2295369B1 (en) * | 2006-07-08 | 2016-04-13 | Cornelius Beverage Technologies Limited | Ice bank cooler |
EP2295370B1 (en) * | 2006-07-08 | 2016-04-13 | Cornelius Beverage Technologies Limited | Beverage dispense system |
EP2295369A1 (en) | 2006-07-08 | 2011-03-16 | IMI Cornelius (UK) Limited | Ice bank cooler |
EP2295370A1 (en) | 2006-07-08 | 2011-03-16 | IMI Cornelius (UK) Limited | Beverage dispense system |
GB2450925B (en) * | 2007-07-12 | 2012-01-04 | Innserve Ltd | Ice Bank Cooler |
GB2450925A (en) * | 2007-07-12 | 2009-01-14 | Innserve Ltd | An Ice Bank Cooler with a Coolant Freezing Below the Freezing Point of Water |
GB2471159B (en) * | 2009-10-30 | 2012-03-07 | Malachy Scott Sr | Beverage coolers |
GB2471159A (en) * | 2009-10-30 | 2010-12-22 | Sr Malachy Scott | Single tank beverage and ice tower cooler |
GB2505869A (en) * | 2012-07-12 | 2014-03-19 | Imi Cornelius Uk Ltd | A beverage cooler comprising an ice bank which has a selectable size |
WO2014009752A1 (en) * | 2012-07-12 | 2014-01-16 | Imi Cornelius (Uk) Limited | Beverage dispense systems |
US10793413B2 (en) | 2015-05-05 | 2020-10-06 | Cornelius Beverage Technologies Limited | Coolant recirculation apparatus for a beverage dispense system |
CN106247738A (en) * | 2016-08-01 | 2016-12-21 | 张家港市三联化工科技有限公司 | 5 DEG C of recirculated cooling water devices in cryogenic distillation apparatus |
CN106247738B (en) * | 2016-08-01 | 2018-12-04 | 张家港市三联化工科技有限公司 | For 5 DEG C of recirculated cooling water devices in cryogenic distillation apparatus |
CN110864491A (en) * | 2018-08-27 | 2020-03-06 | 广东美的白色家电技术创新中心有限公司 | Refrigerator with a door |
GR1009823B (en) * | 2019-11-06 | 2020-09-24 | Αναστασιος Δημητριου Καλλιτσης | Device for fast the cooling of beverages |
Also Published As
Publication number | Publication date |
---|---|
GB9619960D0 (en) | 1996-11-13 |
GB2317680A9 (en) | 2000-06-20 |
GB2317680B (en) | 2000-05-17 |
IES960664A2 (en) | 1996-12-11 |
IES70737B2 (en) | 1996-12-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20110925 |