CA2100267A1 - Heat exchangers - Google Patents
Heat exchangersInfo
- Publication number
- CA2100267A1 CA2100267A1 CA002100267A CA2100267A CA2100267A1 CA 2100267 A1 CA2100267 A1 CA 2100267A1 CA 002100267 A CA002100267 A CA 002100267A CA 2100267 A CA2100267 A CA 2100267A CA 2100267 A1 CA2100267 A1 CA 2100267A1
- Authority
- CA
- Canada
- Prior art keywords
- heat exchanger
- stack
- fins
- end portion
- side portion
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A heat exchanger has a fabrication (10) defining two intertwined serpentine passages (12, 14). Each passage (12/14) is for counterflow passage of a gaseous medium. The fabrication (10) is in the form of an upright stack with one flow passage (12) from bottom to top of the stack and the other flow passage (14) from top to bottom of the stack. The fabrication (10) for each flow passage (12/14) includes an upright aligned series of horizontal portions connected together by reflexive bend portions.
Description
2 9 APi~L 199~
21 ~3 ~ 2i~
HEAT EXCHANGERS
This invention relates to heat exchangers particularly, but not nece~sarilyt for use in dome~tic and/or light indu~trial/commercial application3~
Ac~ordingly, the pre~ent invention i8 a heat exchanger having a fabrication defining two intertwined serpentine pa~qage3, each or counterflow pas~age of a gaseous or liquid medium, the fabrication being in the form of an upright stack with one flow pa~sage from bottom to top of the ~tack and the other flow passage ~.
from top to ~ottom of the stack, the fabrication for each flow pa~age including an upright aligned ~eries of horizontal portion~ connected together by reflexive bend portions, the passages at the reflexive bend portions being open and upright corner poste being provided to close of~ the open corners of the pa~age~ in the stack.
The pas~ages ~re de~irably angularly disposed to each other by ninety degrees whereby the hori~ontal portions of each ~low pa~sage are in a multiple cro~flow relationahip with each other.
Preferably also, the fabrication is formed from a plurality of ~imilar-shaped sheet member8, each pxofiled to provide a major rectangular planar portion with a bent fir~t end portion at one end terminating in a first flange, a fir~t upright lateral side portion terminating in a ~econd inward flange, a bent second end portion at .. . .. . .. _ çc~ on 5l~ ~5 ~ i f 'JT~ SH L ET
W092/13248 PCT/G~92/OOt15 2 ~ Q ~
the other end terminating in a third inward flange and a bent second lateral side portion terminating in a fourth inward flange, the second end portion extending in a direction opposite from that o the first end portion 05 and first and second side portions. The depth of the flow passage is desirably determined by the depth of the first side portion. Four upright corner posts are preferably provided secured to a base, the sheet members :- - fitting-within the area defined by-the-posts-with major lo planar portions-of the sheet members parallel to each other, the posts closing off the open corners of the passages when the sheet members are erected together to form the stack. Insulated side panels and a top are provided for fixing around the posts, the respective side panels having openings to align with inlets and outlets of the passages.
Preferably further, a series of fins is secured across the major planar portion in spaced relationship parallel to the first side portion. The fins desirably extend in ~he same direction from the planar portion as does the first side portion and the fins are of lesser depth than the first side portion. A second series of fins is preferably secured across the major planar . .
portion in spaced relation parallel to each other and 2s extending from the opposite side of the major planar portion and at right angles to the first series of fins.
i, ~ 3, ,~ ~3 A condensate collecting receptacle and plugged drain is beneficially provided at or adjacent to the outlet at the bottom of the stac~. At least one centrifugal fan having a filtered inlet housing is 05 desirably provided for each stack to pressurise gaseous or liquid medium through one or each flow passage.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:-Fig. 1 i5 a perspective view of two adjacent sides and a top of a heat exchanger according to the present invention with parts cut-away for clarity; and Fig. 2 is a perspective view of a sheet member.
Referring to the drawings, a heat exchanger has a fabrication 10 defining two inl:ertwined serpentine passages 12, 14. Each passage 12/14 is for counterflow of a gaseous medium. The fabr:ication 10 is in the form of an upright stack with one flow passage 12 from bottom to top of the stack and the other passage 14 from top to bottom of the stack. The fabrication 10 for each flow passage 12/14 includes an upright aligned series of horizontal portions connected together by reflexive bend portions. The passages 12, 14 are angularly disposed to each other by ninety degrees whereby the horizontal ~ortions of each flow passage a~e in a multiple crossflow relationship with each other, there being twenty crossflow port ~ns, ten for each passaqe 12/14 ~ 7 shown in Fig. 1. The fabrication 10 is form~d from a plurality of similar-shaped sheet members 16. Each sheet member 16 is profiled, as shown in Fig. 2, to provide a major rectangular planar portion 18 with a bent, for 05 example curved as shown, first end portion 20 at one end terminating in a first flange 22; a first upright lateral side portion 24 terminating in a second inward flange 26; a bent, preferably curved, second end portion . - 28 at the other end terminating in a third inward--flange--lo 30 and a bent, preferably curved, second lateral side portion ~2 terminating in a fourth inward flange 34. The second end portion 28 extends in a direction op~osite from that of the first end portion 20 and first and second side portions 28, 32. The depth of each flow 15 passage 12, 14 1S determined by the depth of the first side portion 24.
Four upright corner posts 36 are of box-section and are provided secured to an insulated base 38. The sheet members 16 fit within the area defined by the ,0 posts 36 with their respective major planar portions 18 parallel to each othèr. The posts 36 close off the open corners at 'A' and 'B' of the flow passages 12, 14 when the sheet members 16 are erected together to form the fabrication 10. Suprajacent sheet members 16 are secured 5 together at anti-clockwise right angle intervals, flange 30 of a suprajacent sheet members 16 being secured to ~ .
WO92/13248 PCT/GB92/OOlt5 2 ~ 3 ~ r~
flange 34 of the sheet member below, and flange 26 being secured under the major planar portion of the suprajacent sheet member 16. The combined depths of the ;
second end portion and the second side portion equals the depth of the first side portion, and the combined curve of the second portion and the second side portion is concentric with the curve of the first end portion.
Insulated side panels 40 and a top panel 42 are pro~ided for fixing around the yosts 36. Two respective side .. . .. . .. .. .
lO ~anels 40 have openings 44 to align with inlets 46, 48 and outlets S0, 52 of the flow passages 12, 14.
A first series of fins 54 (shown in broken line) is secured acxoss the major planar portion 13 in spaced relationship parallel to the .Eirst side portion 24 in each member 16. The fins 54 extend in the same direction from the planar portion 1 a as does the first side portion 24 and the fins 54 are of lesser depth than the first side portion 24~
A condensate collecting receptacle 56, i.e. a sump or tube, having a plugged drain 58 is provided at the outlet 46 at the bottom of the stac~.
A pair of centriugal fans 60 having a common filte~red inlet housing 62 is provided for each stack to pressurise gaseous medium through one flow passage 14.
~5 The joints between the sheet members 16 and between sheet members 16 and posts 36 are sealed. In use, a heat exchanger described above is interposed in W092/~3248 PCT/GB92/0011~
2 ~ 6 an exhaust pipe system for exhausting hot air or gases to recover otherwise 'lost' heat therefrom. The exhaust pipe ~not shown) is connected up to the inlet 48 of passage 12 for the air or gas to flow through the 05 sinuous flow passage 12, heat the sides and fins of the passage 12 and thereby transfer by conduction heat to the air or gas flowing through passage 14 in a counterflow direction from the fans 60. The outlet 50 of~the~flow passage 12 is connected to the remaining part of the exhaust pipe system and the outlet 52 of the flow passage 12 is connected up for conveying the heated air or gas to the required apparatus.
A heat exhanger as described above is beneficial since, although operating in a counterflow manner, due to the mu1tiple crossflow portions of the passages 12, 14 is of higher thermal efficiency than a conventional crossflow heat exchanger while having manufacturing costs similar to a crossflow heat exchanger.
In a first modification, a second series of fins 64 is secured across the major planar portion 18 in spaced relation parallel to each other and extending from the opposite side of the major planar portion 18 and at right angles to the first series of fins 54. The spacing between the fins 64 of the second series is such as to alternate with the fins 54 of the first series when a second sheet member 16 is superimposed at a right WO92/13248 PCT/GB9~/00115 2 1 ~3 ~ 2137 angular disposition over a first sheet member 16.
In a second modification, the fins 54 and/or 64 are of any suitable configuration other than straight as shown in Fig. 2, for example waved, corrugated or 05 zigzagged. Also, the sides of the fins may be dimpled or embossed.
The stack can comprise any required number of sheet members 16 to giv~ the desired number of horizontal portions in the flow passages.
The bent portions of each sheet member are shown as curved however other suitable shapes of bent portions can be used.
The sheet members are beneficially of aluminium but can be of any suitable material.
When the heat exchanger is to be used with liquid medium, the flow passages are made liquid tight and pumps are used in place of the centrifugal fan~s).
Variations and other modifications can be made without departing from the soope of the invention described above.
- -, ; : ;;, , . - ,, , . . "
21 ~3 ~ 2i~
HEAT EXCHANGERS
This invention relates to heat exchangers particularly, but not nece~sarilyt for use in dome~tic and/or light indu~trial/commercial application3~
Ac~ordingly, the pre~ent invention i8 a heat exchanger having a fabrication defining two intertwined serpentine pa~qage3, each or counterflow pas~age of a gaseous or liquid medium, the fabrication being in the form of an upright stack with one flow pa~sage from bottom to top of the ~tack and the other flow passage ~.
from top to ~ottom of the stack, the fabrication for each flow pa~age including an upright aligned ~eries of horizontal portion~ connected together by reflexive bend portions, the passages at the reflexive bend portions being open and upright corner poste being provided to close of~ the open corners of the pa~age~ in the stack.
The pas~ages ~re de~irably angularly disposed to each other by ninety degrees whereby the hori~ontal portions of each ~low pa~sage are in a multiple cro~flow relationahip with each other.
Preferably also, the fabrication is formed from a plurality of ~imilar-shaped sheet member8, each pxofiled to provide a major rectangular planar portion with a bent fir~t end portion at one end terminating in a first flange, a fir~t upright lateral side portion terminating in a ~econd inward flange, a bent second end portion at .. . .. . .. _ çc~ on 5l~ ~5 ~ i f 'JT~ SH L ET
W092/13248 PCT/G~92/OOt15 2 ~ Q ~
the other end terminating in a third inward flange and a bent second lateral side portion terminating in a fourth inward flange, the second end portion extending in a direction opposite from that o the first end portion 05 and first and second side portions. The depth of the flow passage is desirably determined by the depth of the first side portion. Four upright corner posts are preferably provided secured to a base, the sheet members :- - fitting-within the area defined by-the-posts-with major lo planar portions-of the sheet members parallel to each other, the posts closing off the open corners of the passages when the sheet members are erected together to form the stack. Insulated side panels and a top are provided for fixing around the posts, the respective side panels having openings to align with inlets and outlets of the passages.
Preferably further, a series of fins is secured across the major planar portion in spaced relationship parallel to the first side portion. The fins desirably extend in ~he same direction from the planar portion as does the first side portion and the fins are of lesser depth than the first side portion. A second series of fins is preferably secured across the major planar . .
portion in spaced relation parallel to each other and 2s extending from the opposite side of the major planar portion and at right angles to the first series of fins.
i, ~ 3, ,~ ~3 A condensate collecting receptacle and plugged drain is beneficially provided at or adjacent to the outlet at the bottom of the stac~. At least one centrifugal fan having a filtered inlet housing is 05 desirably provided for each stack to pressurise gaseous or liquid medium through one or each flow passage.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:-Fig. 1 i5 a perspective view of two adjacent sides and a top of a heat exchanger according to the present invention with parts cut-away for clarity; and Fig. 2 is a perspective view of a sheet member.
Referring to the drawings, a heat exchanger has a fabrication 10 defining two inl:ertwined serpentine passages 12, 14. Each passage 12/14 is for counterflow of a gaseous medium. The fabr:ication 10 is in the form of an upright stack with one flow passage 12 from bottom to top of the stack and the other passage 14 from top to bottom of the stack. The fabrication 10 for each flow passage 12/14 includes an upright aligned series of horizontal portions connected together by reflexive bend portions. The passages 12, 14 are angularly disposed to each other by ninety degrees whereby the horizontal ~ortions of each flow passage a~e in a multiple crossflow relationship with each other, there being twenty crossflow port ~ns, ten for each passaqe 12/14 ~ 7 shown in Fig. 1. The fabrication 10 is form~d from a plurality of similar-shaped sheet members 16. Each sheet member 16 is profiled, as shown in Fig. 2, to provide a major rectangular planar portion 18 with a bent, for 05 example curved as shown, first end portion 20 at one end terminating in a first flange 22; a first upright lateral side portion 24 terminating in a second inward flange 26; a bent, preferably curved, second end portion . - 28 at the other end terminating in a third inward--flange--lo 30 and a bent, preferably curved, second lateral side portion ~2 terminating in a fourth inward flange 34. The second end portion 28 extends in a direction op~osite from that of the first end portion 20 and first and second side portions 28, 32. The depth of each flow 15 passage 12, 14 1S determined by the depth of the first side portion 24.
Four upright corner posts 36 are of box-section and are provided secured to an insulated base 38. The sheet members 16 fit within the area defined by the ,0 posts 36 with their respective major planar portions 18 parallel to each othèr. The posts 36 close off the open corners at 'A' and 'B' of the flow passages 12, 14 when the sheet members 16 are erected together to form the fabrication 10. Suprajacent sheet members 16 are secured 5 together at anti-clockwise right angle intervals, flange 30 of a suprajacent sheet members 16 being secured to ~ .
WO92/13248 PCT/GB92/OOlt5 2 ~ 3 ~ r~
flange 34 of the sheet member below, and flange 26 being secured under the major planar portion of the suprajacent sheet member 16. The combined depths of the ;
second end portion and the second side portion equals the depth of the first side portion, and the combined curve of the second portion and the second side portion is concentric with the curve of the first end portion.
Insulated side panels 40 and a top panel 42 are pro~ided for fixing around the yosts 36. Two respective side .. . .. . .. .. .
lO ~anels 40 have openings 44 to align with inlets 46, 48 and outlets S0, 52 of the flow passages 12, 14.
A first series of fins 54 (shown in broken line) is secured acxoss the major planar portion 13 in spaced relationship parallel to the .Eirst side portion 24 in each member 16. The fins 54 extend in the same direction from the planar portion 1 a as does the first side portion 24 and the fins 54 are of lesser depth than the first side portion 24~
A condensate collecting receptacle 56, i.e. a sump or tube, having a plugged drain 58 is provided at the outlet 46 at the bottom of the stac~.
A pair of centriugal fans 60 having a common filte~red inlet housing 62 is provided for each stack to pressurise gaseous medium through one flow passage 14.
~5 The joints between the sheet members 16 and between sheet members 16 and posts 36 are sealed. In use, a heat exchanger described above is interposed in W092/~3248 PCT/GB92/0011~
2 ~ 6 an exhaust pipe system for exhausting hot air or gases to recover otherwise 'lost' heat therefrom. The exhaust pipe ~not shown) is connected up to the inlet 48 of passage 12 for the air or gas to flow through the 05 sinuous flow passage 12, heat the sides and fins of the passage 12 and thereby transfer by conduction heat to the air or gas flowing through passage 14 in a counterflow direction from the fans 60. The outlet 50 of~the~flow passage 12 is connected to the remaining part of the exhaust pipe system and the outlet 52 of the flow passage 12 is connected up for conveying the heated air or gas to the required apparatus.
A heat exhanger as described above is beneficial since, although operating in a counterflow manner, due to the mu1tiple crossflow portions of the passages 12, 14 is of higher thermal efficiency than a conventional crossflow heat exchanger while having manufacturing costs similar to a crossflow heat exchanger.
In a first modification, a second series of fins 64 is secured across the major planar portion 18 in spaced relation parallel to each other and extending from the opposite side of the major planar portion 18 and at right angles to the first series of fins 54. The spacing between the fins 64 of the second series is such as to alternate with the fins 54 of the first series when a second sheet member 16 is superimposed at a right WO92/13248 PCT/GB9~/00115 2 1 ~3 ~ 2137 angular disposition over a first sheet member 16.
In a second modification, the fins 54 and/or 64 are of any suitable configuration other than straight as shown in Fig. 2, for example waved, corrugated or 05 zigzagged. Also, the sides of the fins may be dimpled or embossed.
The stack can comprise any required number of sheet members 16 to giv~ the desired number of horizontal portions in the flow passages.
The bent portions of each sheet member are shown as curved however other suitable shapes of bent portions can be used.
The sheet members are beneficially of aluminium but can be of any suitable material.
When the heat exchanger is to be used with liquid medium, the flow passages are made liquid tight and pumps are used in place of the centrifugal fan~s).
Variations and other modifications can be made without departing from the soope of the invention described above.
- -, ; : ;;, , . - ,, , . . "
Claims (17)
CLAIMS:
1. A heat exchanger having a fabrication defining two intertwined serpentine passages, each for counterflow passage of a gaseous or liquid medium, the fabrication being in the form of an upright stack with one flow passage from bottom to top of the stack and the other flow passage from top to bottom of the stack, the fabrication for each flow passage including an upright aligned series of horizontal portions connected together by reflexive bend portions, the passages at the reflexive bend portions being open, and upright corner posts being provided to close off the open corners of the passages in the stack.
2. Heat exchanger as claimed in Claim 1, wherein the passages are angularly disposed to each other by ninety degrees whereby the horizontal portions of each flow passage are in a multiple crossflow relationship with each other.
3. Heat exchanger as claimed in Claims 1 or 2, wherein the fabrication is formed from a plurality of similar-shaped sheet members.
4. Heat exchanger as claimed in Claim 3, wherein each sheet member is profiled to provide a major rectangular planar portion with a bent first end portion at one end terminating in a first flange, a first upright lateral side portion terminating in a second inward flange, a bent second end portion at the other end terminating in a third inward flange and a bent second lateral side portion terminating in a fourth inward flange, the second end portion extending in a direction opposite from that of the first end portion and first and second side portions.
5. Heat exchanger as claimed in Claim 4, wherein the first end portion, the second end portion and the second lateral side portion are curved.
6. Heat exchanger as claimed in Claim 4 or 5, wherein the depth of the flow passage is determined by the depth of the first side portion.
7. Heat exchanger as claimed in Claim 6, wherein the combined depths of the second end portion and the second side portion equals the depth of the first side portion.
8. Heat exchanger as claimed in Claim 7, wherein the combined curve of the second end portion of one of the sheet members and the second side portion of the adjacent sheet member are, in the assembled state, concentric with the curve of the first end portion of another plate in the fabricated stack.
9. Heat exchanger as claimed in any one of Claims 4 to 8, wherein four corner posts are provided secured to a base with the sheet members fitting within the area defined by the posts with the major planar portions of the sheet members parallel to each other, the posts closing off the open corners of the passages when the sheet members are erected together to form the stack.
10. Heat exchanger as claimed in Claim 9, wherein insulated side panels and a top are provided for fixing around the posts, the respective side panels having openings to align with inlets and outlets of the flow passages.
11. Heat exchanger as claimed in any one of Claims 4 to 10, wherein a first series of fins is secured across the major planar portion in spaced relationship parallel to the first side portion.
12. Heat exchanger as claimed in Claim 11, wherein the fins of the first series extend in the same direction from the planar portion as does the first side portion and the fins are of lesser depth than that of the first side portion.
13. Heat exchanger as claimed in Claim 12, wherein a second series of fins is secured across the major planar portion in spaced relation parallel to each other and extending from the opposite side of the major planar portion and at right angles to the first series of fins.
14. Heat exchanger as claimed in Claim 13, wherein the spacings between the fins of the second series is such as to alternate with the fins of the first series when a second sheet member is superimposed at a right angular disposition over a first sheet member.
15. Heat exchanger as claimed in any one of the preceding Claims, wherein a condensate collecting receptacle and plugged drain is provided at or adjacent to the outlet at the bottom of the stack.
16. Heat exchanger as claimed in any one of the preceding Claims, wherein at least one centrifugal fan having a filtered inlet housing is provided for each passage in the fabrication to pressurise gaseous medium through one or each flow passage.
17. Heat exchanger substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9101112.2 | 1991-01-18 | ||
| GB919101112A GB9101112D0 (en) | 1991-01-18 | 1991-01-18 | Modular heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2100267A1 true CA2100267A1 (en) | 1992-07-19 |
Family
ID=10688646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002100267A Abandoned CA2100267A1 (en) | 1991-01-18 | 1992-01-20 | Heat exchangers |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0567526A1 (en) |
| AU (1) | AU1172692A (en) |
| CA (1) | CA2100267A1 (en) |
| GB (2) | GB9101112D0 (en) |
| IE (1) | IE77164B1 (en) |
| WO (1) | WO1992013248A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE79044C (en) * | — o. wehrle, Emmendingen, Baden, u. E. fehr, Riegel | Heat exchange device for liquids with intersecting motion | ||
| FR2216539B1 (en) * | 1973-02-02 | 1976-09-10 | Chaffoteaux Et Maury | |
| FR2311267A1 (en) * | 1975-05-14 | 1976-12-10 | Interliz Anstalt | Cross flow plate heat exchanger - has frame housing with two rectangular cover plates and four hollow connecting struts of triangular cross section |
| FR2314461A1 (en) * | 1976-05-07 | 1977-01-07 | Dieu Andre | Composite-type heat exchanger - comprises identical plates with chambes formed between adjacent ones constituting two circuits |
| DE3105387C2 (en) * | 1981-02-14 | 1984-08-30 | Wolfgang Dipl.-Ing. Heuer | Heat pump evaporator to recover heat from polluted, untreated wastewater |
| NZ201673A (en) * | 1981-09-11 | 1986-07-11 | R J Pollard | Flat plate heat exchanger core with diversion elements to allow several fluid passes through core |
| DE8220601U1 (en) * | 1982-07-19 | 1987-12-10 | Weigelt, Arno-Wolfgang, Ing.(Grad.), 7250 Leonberg | Heat exchanger |
| EP0108377A1 (en) * | 1982-11-04 | 1984-05-16 | Matsushita Electric Industrial Co., Ltd. | Heat exchanger |
| DE3320167A1 (en) * | 1983-06-03 | 1984-12-06 | Gea Ahlborn Gmbh & Co Kg, 3203 Sarstedt | Heat exchanger |
-
1991
- 1991-01-18 GB GB919101112A patent/GB9101112D0/en active Pending
-
1992
- 1992-01-20 AU AU11726/92A patent/AU1172692A/en not_active Abandoned
- 1992-01-20 CA CA002100267A patent/CA2100267A1/en not_active Abandoned
- 1992-01-20 IE IE920154A patent/IE77164B1/en not_active IP Right Cessation
- 1992-01-20 EP EP19920903312 patent/EP0567526A1/en not_active Withdrawn
- 1992-01-20 WO PCT/GB1992/000115 patent/WO1992013248A1/en not_active Application Discontinuation
-
1993
- 1993-07-02 GB GB9313713A patent/GB2269229B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| IE920154A1 (en) | 1992-07-29 |
| EP0567526A1 (en) | 1993-11-03 |
| GB2269229B (en) | 1994-08-24 |
| GB9101112D0 (en) | 1991-02-27 |
| WO1992013248A1 (en) | 1992-08-06 |
| AU1172692A (en) | 1992-08-27 |
| GB9313713D0 (en) | 1993-10-20 |
| GB2269229A (en) | 1994-02-02 |
| IE77164B1 (en) | 1997-12-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |