NZ551296A - Heat resistant casing - Google Patents
Heat resistant casingInfo
- Publication number
- NZ551296A NZ551296A NZ551296A NZ55129605A NZ551296A NZ 551296 A NZ551296 A NZ 551296A NZ 551296 A NZ551296 A NZ 551296A NZ 55129605 A NZ55129605 A NZ 55129605A NZ 551296 A NZ551296 A NZ 551296A
- Authority
- NZ
- New Zealand
- Prior art keywords
- heat resistant
- casing according
- housing
- intumescent material
- fire
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 38
- 230000009970 fire resistant effect Effects 0.000 claims abstract description 30
- 239000007787 solid Substances 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- HTWFXPCUFWKXOP-UHFFFAOYSA-N Tertatalol Chemical compound C1CCSC2=C1C=CC=C2OCC(O)CNC(C)(C)C HTWFXPCUFWKXOP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/12—Flameproof or explosion-proof arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Insulated Conductors (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Building Environments (AREA)
- Installation Of Indoor Wiring (AREA)
- Casings For Electric Apparatus (AREA)
- Finishing Walls (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Ceramic Products (AREA)
- Glass Compositions (AREA)
Abstract
Disclosed is a heat resistant casing adapted to contain an electrical fitting. The casing includes a housing of fire resistant material having a top and supporting side-wall provided with at least one aperture. The housing includes an attachment means to enable an electrical fitting to be attached to and enclosed within the housing. Within the housing is a first solid fire-resistant intumescent material which lies between the interior surface of the top and the electrical fitting. The housing is of a self-supporting substantially rigid construction and includes a collar of a second solid fire-resistant intumescent material which extends substantially completely around the exterior surface of the side wall. The first solid fire-resistant intumescent material is provided with at least one aperture and is spaced apart from the interior surface of the top to form a gap so that in the event of a fire or excessive heating the first solid fire-resistant intumescent material can expand into the gap.
Description
551296 PC17GB2005/001906 HEAT RESISTANT CASING This invention relates to a new fire resistant casing for use with electrical fittings, particularly for use with lamp holders.
New building regulations require down-lighters fitted into ceilings to be provided with fire hoods to prevent or at least minimise the spread of fire. Various types of fire hood have been proposed which include a fire resistant intumescent material that upon excessive heating (e.g. in the event of a fire) expand to many times their original volume, thus forming a fire barrier to minimise or prevent fire spread. These hoods have been quite successful, but the aim is still to increase the efficiency of the built-in ventilation and fire/heat protection, whilst providing a cost effective and easy to install option. An object of the present invention is to provide a new heat resistant casing (fire hood) which can be supplied already fitted with a lamp holder or other electrical fitting and which in use is efficient at minimising heat build up and also in preventing or minimising fire spread, should that occur.
According to one aspect of the present invention, there is provided a heat-resistant casing for an electrical fitting in which the casing comprises a housing of heat resistant material comprising a top supporting one or more side-walls, the top is provided with at least one aperture, the housing encloses an electrical fitting which is attached to the housing by an attachment means, and within the housing is a first solid fire-resistant intumescent material positioned between the interior surface of the top and the electrical fitting, characterised in that the first solid fire-resistant intumescent material is provided with at least one aperture and is spaced apart from the interior surface of the top, and the housing is further provided with a collar of a second solid fire-resistant intumescent material which extends substantially completely around the exterior surface of the side wall or walls.
The housing is preferably of substantially circular cross-section and is preferably of self-supporting substantially rigid construction and of metal or plastic. The top preferably has a plurality of apertures for ventilation (heat dissipation), passage of electrical cables and attachment means for the first fire resistant intumescent material. The 'free edge' of the side wall, i.e. the side wall remote from the top, preferably has an outwardly extending lip. This 551296 2 PC17GB2005/001906 lip may be used for attachment of a cover for the electrical fitting. Where the electrical fitting is a lamp holder, a cover in the form of a decorative ring can be attached to the lip. The casing is particularly applicable for recessing into a support structure such as a ceiling or wall, especially when the support structure is being constructed. In a preferred embodiment, a seal is provided substantially overlying the lip so that the seal when in use is sandwiched between the lip and the surface into which the casing is fitted e.g. a ceiling or wall. One aim of the seal is to prevent moisture and air from getting between the casing and the fitting surface (e.g. ceiling or wall) and thus into the voids between floors and into loft spaces. This is an area in which house builders are being told to clamp down, so to improve energy efficiency and is requested by the NHBC (National House Builders Council). A further potential benefit of the seal is that it allows the casing to sit evenly on the ceiling where a textured surface, e.g. Artex, has been used, thus not showing gaps around the rim and preventing the downlighter leaning at an angle. In addition the seal helps to reduce the contact temperature between the rim of the downlighter and the ceiling board. The seal may e.g be made of a moistrure resistant elastomeric composition and preferably is provided with a raised rib portion on the surface remote from the lip.
The intumescent material may be based on graphite or other intumesecent materials which upon exposure to extreme heat expand in volume. An example of a graphite based material is that supplied by Technical Fibre Products Limited as 'Intumescent Material' and consists of a high temperature Rockwool fibre mat containing easily dispersed foliating graphite bonded in acrylic. The first and second intumescent materials may be of the same composition or different.
Preferably the first intumescent material is provided with a plurality of apertures. The apertures are for passage of electrical cables and/or for ventilation to dissipate heat that tends to build up in the casing when the electrical fitting is switched on. Preferably a plate is provided to support the first intumescent material, in which case the plate is usually provided with apertures, at least some of which coincide with those of the first intumescent material. The apertures are conveniently circular holes punched through with 551296 3 a suitable tool. The plate is preferably sized to fit snugly within the casing and may then be attached to the interior surface of the top by means of e.g. nuts and boits. The nuts also serve to maintain the necessary space between the interior surface of the top and the first intumescent material supported on the plate. Preferably the gap between the interior surface of the top and the first intumescent material is in the range 2 to 8 mm, more preferably 2 to 5mm. Where a plate is provided, this may conveniently be used for attachment of the electrical fitting e.g. by means of nuts and bolts. The electrical fitting is preferably positioned within the housing so that it does not touch the internal surface of the side wall or walls.
It will be appreciated that certain features of the invention which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are for brevity described in the context of a single embodiment, may also be provided separately or in any suitable combination.
Embodiments of the present invention will now be described with reference to the accompanying drawings in which: Figure 1 is a schematic view, partly in section, of a casing according to the present invention; Figure 2 is a perspective top view of the casing of Figure 1, also showing connections of the electrical cable to a terminal housing.
Figure 3 is a perspective top view of the first solid fire-resistant material used in Figure 1, attached to its backing plate and threaded through with electrical cables.
Figure 4 is a bottom view of the first solid fire-resistant material and attached backing plate of Figure 3 in position in the casing.
Figure 5 is a schematic side view, partly in section, of the casing of Figure 1. Figure 6 are perspective and side views illustrating a moisture seal (2 views), the seal positioned on a heat resistant casing and the casing recessed into a ceiling.
Referring now to Figure 1 a heat resistant casing 10 comprises a cylindrical pressed steel housing consisting of a top 11 supporting a side wall 12. The 551296 4 side wall 12 has a lip 13 onto which is clipped a cover 14 by means of spring clips 14a & 14b. A collar 15 of solid fire resistant intumescent material surrounds the lower edge of the side wall 12. The collar 15 is 25mm high and 12mm thick and is glued in place. Within the housing is a steel plate 16 supporting a 12mm thick layer of solid fire resistant intumescent material 17. Plate 16 and layer 17 have corresponding apertures. The gap 16A between the top 11 and layer 17 is chosen to be in the range 2 to 5mm. The plate 16 is held in place by nuts and bolts 18, which also keep the gap 16A consistent. A pressed steel lamp holder 19 is attached to plate 16 by means of nuts and bolts 20. An aluminium lamp 21 fits into the lamp holder 19.
Referring to Figure 2, seven apertures are apparent in top 11. Through three apertures electrical cabling 22 to 24 passes, into two apertures are fitted fixing nuts and bolts for the terminal housing 25, one aperture 26 is open for ventilation, and one aperture 27 is occupied by a nut and bolt connected to the plate 16 inside the casing.
Referring to Figure 3, cables 22 and 23 are shown, together with ventilation apertures 28,29.
Referring to Figure 4, cables 22 & 23 are shown through plate 16, plus four ventilation apertures e.g. 30.
Figure 5 is a schematic representation showing i.a. more clearly how the down-lighter cover 14 clips into place.
In operation, the apertures in the top 11, solid fire resistant intumescent material 17 and plate 16 act to ventilate the casing and dissipate heat.
In the event of a fire, the solid fire resistant intumescent material 17 expands to 9 times its volume, filling the gap between the top 11 and plate 16 and the aforementioned apertures including those through which the cabling passes. This expansion helps to prevent the fire from spreading e.g. to an upper floor when the housing is recessed into a ceiling. Also, the collar 15 of solid fire resistant intumescent material expands to nine times its volume, filling the space between the housing and the surrounding structure e.g. the ceiling.
This expansion helps to prevent the fire from spreading. Where a seal is fitted as in Figure 6, this aims to prevent moisture and air from getting between the casing and the ceiling and also helps to give the casing a flat fitting in the ceiling. 551296
Claims (22)
1. A heat resistant casing adapted to contain an electrical fitting in which the casing comprises a housing of fire resistant material having a top supporting one or more side-walls, the top is provided with at least one aperture, the housing is provided with an attachment means to enable an electrical fitting to be attached to and enclosed within the housing, and within the housing is a first solid fire-resistant intumescent material positioned so that when used with an electrical fitting the first solid fire-resistant intumescent material would be between the interior surface of the top and the electrical fitting, characterised in that the housing is of a self-supporting substantially rigid construction, the housing is provided with a collar of a second solid fire-resistant intumescent material which extends substantially completely around the exterior surface of the side wall or walls and the first solid fire-resistant intumescent materia! is provided with at least one aperture and is spaced apart from the interior surface of the top to form a gap so that in the event of a fire or excessive heating the first solid fire-resistant intumescent material can expand into the gap.
2. A heat resistant casing according to Claiml characterised in that the housing has a substantially circular cross-section.
3. A heat resistant casing according to Claim 1 or 2 characterised in that the housing is of metal or plastic.
4. A heat resistant casing according to any preceding claim characterised in that the collar is adjacent the edge of the side wall remote from the top.
5. A heat resistant casing according to any preceding claim characterised in that the collar is positioned so that in the event of a fire or excessive heating the collar can expand to fill the space between the casing and a surrounding structure.
6. A heat resistant casing according to any preceding claim characterised that the side wall remote from the top has an outwardly extending lip. 6 551296
7. A heat resistant casing according to claim 6 characterised in that a seal is provided which extends substantially around the surface of the outwardly extending lip.
8. A heat resistant casing according to claim 7 characterised in that the seal is positioned so that when the casing is fitted into a retaining surface the seal will be sandwiched between the outwardly extending lip and that retaining surface.
9. A heat resistant casing according to any preceding claim characterised in that the top is provided with a plurality of apertures.
10. A heat resistant casing according to any preceding claim characterised in that the first solid fire-resistant intumescent material is provided with a plurality of apertures.
11. A heat resistant casing according to any preceding claim characterised in that the housing is further provided with a plate which supports the first solid fire-resistant intumescent material.
12. A heat resistant casing according to any preceding claim characterised in that the first solid fire-resistant intumescent material is spaced apart from the internal surface of the top by a gap of from 2 to 8mm.
13. A heat resistant casing according to Claim 12 characterised in that the gap is from 2 to 5 mm.
14. A heat resistant casing according to Claim 11 characterised in that the plate is provided with at least one aperture.
15. A heat resistant casing according Claim 14 characterised in that at least one aperture in the plate coincides with at least one aperture in the first solid fire-resistant intumescent material.
16. A heat resistant casing according to any one of claims 11 to 15 characterised in that the electrical fitting is attached to the plate.
17. A heat resistant casing according to any preceding claim characterised in that the electrical fitting is attached by means of electrical cabling to a terminal housing outside the casing. i^.
18.A heat resistant casing according to any preceding claim characterised in that the electrical fitting is spaced from the internal surface of the side wall or walls. 7 551296
19. A heat resistant casing according to any preceding claim characterised in that the electrical fitting comprises a lamp holder.
20. A heat resistant casing according to any preceding claim characterised in that the first solid fire-resistant intumescent material is of substantially the same composition as the second solid fire-resistant intumescent material.
21.A heat resistant casing according to any preceding claim characterised in that it is adapted to be recessed into a support structure.
22. A heat resistant casing according to claim 1 and substantially as herein described with reference to any one of Figures 1 to 6.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0413655.2A GB0413655D0 (en) | 2004-06-18 | 2004-06-18 | Heat resistant casing |
| GB0504267A GB2415245B (en) | 2004-06-18 | 2005-03-02 | Heat resistant casing |
| PCT/GB2005/001906 WO2005124225A1 (en) | 2004-06-18 | 2005-05-17 | Heat resistant casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NZ551296A true NZ551296A (en) | 2009-12-24 |
Family
ID=32750154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NZ551296A NZ551296A (en) | 2004-06-18 | 2005-05-17 | Heat resistant casing |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1607675A1 (en) |
| CN (2) | CN1710326A (en) |
| AT (1) | ATE465371T1 (en) |
| DE (1) | DE602005020778D1 (en) |
| DK (1) | DK1756472T3 (en) |
| GB (2) | GB0413655D0 (en) |
| HK (1) | HK1107137A1 (en) |
| NZ (1) | NZ551296A (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2422191B (en) * | 2005-01-27 | 2007-01-10 | Rd Europe Ltd | Fire-resistant lighting fitting |
| GB2421070B (en) * | 2005-01-27 | 2007-01-10 | Rd Europe Ltd | Fire-resistant cover for lighting fitting |
| GB0510494D0 (en) * | 2005-05-23 | 2005-06-29 | Aurora Ltd | Improvements to fire related downlights |
| GB2429052B (en) * | 2005-08-08 | 2010-09-22 | Laurence Kovacs | Lighting assemblies |
| CN200958737Y (en) * | 2006-09-22 | 2007-10-10 | 武良举 | Fireproof cylindrical light |
| US8029345B2 (en) * | 2006-09-29 | 2011-10-04 | Unico, Inc. | Fire stop outlet for small duct, high velocity air distribution systems |
| US7670033B2 (en) * | 2007-01-11 | 2010-03-02 | Tenmat Ltd. | Fire stop for light fixture |
| GB0710328D0 (en) | 2007-05-30 | 2007-07-11 | Intram Bramwell Ltd | Casing |
| WO2009006786A1 (en) * | 2007-07-05 | 2009-01-15 | Liangju Wu | A fireproof lamp |
| GB2453950A (en) * | 2007-10-23 | 2009-04-29 | Emcogroup Ltd | Fire damper |
| CN201149181Y (en) | 2007-12-11 | 2008-11-12 | 武良举 | Embedded type lamp with heat radiating device |
| GB2459538B (en) * | 2008-05-01 | 2011-07-20 | Photonstar Led Ltd | Fire rated luminaire |
| CN202118720U (en) * | 2011-05-19 | 2012-01-18 | 武良举 | Embedded fireproof ceiling lamp |
| CN202284754U (en) * | 2011-10-26 | 2012-06-27 | 武良举 | Light emitting diode (LED) fireproof lamp |
| US20150087174A1 (en) * | 2013-09-25 | 2015-03-26 | Osram Sylvania Inc. | Mountable connector box for electrical device |
| GB2515649B (en) * | 2014-06-09 | 2015-10-14 | Kosnic Lighting Ltd | Fire resistant downlight |
| US9512994B2 (en) | 2015-02-16 | 2016-12-06 | Elite Lighting | Fire rated recessed lighting assembly |
| US9752765B2 (en) | 2015-02-16 | 2017-09-05 | Elite Lighting | Fire rated recessed lighting assembly |
| USD785852S1 (en) | 2015-04-03 | 2017-05-02 | Elite Lighting | Adapter for a fire rated lighting assembly |
| USD791395S1 (en) | 2015-04-03 | 2017-07-04 | Elite Lighting | Disc insert for a lighting assembly |
| USD810997S1 (en) | 2015-04-07 | 2018-02-20 | Elite Lighting | Ring for recessed lighting |
| USD799935S1 (en) | 2015-04-09 | 2017-10-17 | Elite Lighting | Disc |
| USD791394S1 (en) | 2015-11-06 | 2017-07-04 | Elite Lighting | Disc insert for a lighting assembly |
| GB2552937B (en) * | 2016-08-08 | 2018-11-14 | All Led Ltd | Downlight assembly |
| CN114761647A (en) * | 2019-09-16 | 2022-07-15 | 豪倍公司 | Fire-proof sleeveless embedded lamp |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9220478D0 (en) * | 1992-09-29 | 1992-11-11 | Hamilton Arthur P | Fire stop covering device for aperture in fire resistant structure |
| GB9501391D0 (en) * | 1995-01-25 | 1995-03-15 | Environmental Seals Ltd | Ventilated covers for electrical fittings |
| WO1998012472A1 (en) * | 1996-09-20 | 1998-03-26 | Peter Charles Jones | Installation of lighting or other fittings in ceilings |
| GB2326467A (en) * | 1997-05-29 | 1998-12-23 | Environmental Seals Ltd | Downlighter with integral fire-resistant hood |
| GB9710921D0 (en) * | 1997-05-29 | 1997-07-23 | Euro Passive Fire Protection L | Ventilated covers for electrical fittings |
| US6105334A (en) * | 1997-09-16 | 2000-08-22 | Logic Construction Systems, L.L.C. | Fire resistant lighting enclosure |
| GB2345125B (en) * | 1998-12-23 | 2002-05-01 | Tenmat Ltd | Intumescent downlighter cover and method of manufacturing same |
| GB2391023B (en) * | 2002-07-20 | 2005-06-29 | Laurence Keith Kovacs | An intumescent assembly |
-
2004
- 2004-06-18 GB GBGB0413655.2A patent/GB0413655D0/en not_active Ceased
- 2004-12-14 EP EP04257764A patent/EP1607675A1/en not_active Withdrawn
-
2005
- 2005-03-02 GB GB0504267A patent/GB2415245B/en active Active
- 2005-03-07 CN CN200510052654.XA patent/CN1710326A/en active Pending
- 2005-05-17 NZ NZ551296A patent/NZ551296A/en not_active IP Right Cessation
- 2005-05-17 DE DE602005020778T patent/DE602005020778D1/en active Active
- 2005-05-17 AT AT05744670T patent/ATE465371T1/en not_active IP Right Cessation
- 2005-05-17 DK DK05744670.0T patent/DK1756472T3/en active
- 2005-05-17 CN CN200580019996.XA patent/CN100529513C/en active Active
-
2007
- 2007-11-16 HK HK07112559.1A patent/HK1107137A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2415245B (en) | 2007-03-28 |
| GB0413655D0 (en) | 2004-07-21 |
| CN100529513C (en) | 2009-08-19 |
| DK1756472T3 (en) | 2010-07-26 |
| HK1107137A1 (en) | 2008-03-28 |
| CN1710326A (en) | 2005-12-21 |
| GB2415245A (en) | 2005-12-21 |
| EP1607675A1 (en) | 2005-12-21 |
| GB0504267D0 (en) | 2005-04-06 |
| CN1969146A (en) | 2007-05-23 |
| ATE465371T1 (en) | 2010-05-15 |
| DE602005020778D1 (en) | 2010-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PSEA | Patent sealed | ||
| RENW | Renewal (renewal fees accepted) | ||
| RENW | Renewal (renewal fees accepted) | ||
| RENW | Renewal (renewal fees accepted) |
Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 17 MAY 2016 BY ACUMASS Effective date: 20150418 |
|
| RENW | Renewal (renewal fees accepted) |
Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 17 MAY 2017 BY E A FENWICK + CO LIMITED Effective date: 20160318 |
|
| RENW | Renewal (renewal fees accepted) |
Free format text: PATENT RENEWED FOR 1 YEAR UNTIL 17 MAY 2018 BY E A FENWICK + CO LIMITED Effective date: 20170328 |
|
| LAPS | Patent lapsed |