DE3322772C2 - Composite film for lining liquid containers - Google Patents
Composite film for lining liquid containersInfo
- Publication number
- DE3322772C2 DE3322772C2 DE3322772A DE3322772A DE3322772C2 DE 3322772 C2 DE3322772 C2 DE 3322772C2 DE 3322772 A DE3322772 A DE 3322772A DE 3322772 A DE3322772 A DE 3322772A DE 3322772 C2 DE3322772 C2 DE 3322772C2
- Authority
- DE
- Germany
- Prior art keywords
- conductive
- film
- container
- leak
- composite
- 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.)
- Expired
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 title claims abstract description 14
- 230000007935 neutral effect Effects 0.000 claims abstract 3
- 239000010408 film Substances 0.000 claims description 41
- 239000004020 conductor Substances 0.000 claims description 14
- 239000011888 foil Substances 0.000 claims description 10
- 239000013039 cover film Substances 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 2
- 239000000463 material Substances 0.000 claims 2
- 239000010959 steel Substances 0.000 claims 2
- 230000032683 aging Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 claims 1
- 238000005260 corrosion Methods 0.000 claims 1
- 230000002950 deficient Effects 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 claims 1
- 239000000295 fuel oil Substances 0.000 claims 1
- 230000004807 localization Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- 239000002985 plastic film Substances 0.000 claims 1
- 229920006255 plastic film Polymers 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003251 chemically resistant material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/186—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Laminated Bodies (AREA)
Abstract
Die Erfindung betrifft eine Verbundfolie 27 zum Auskleiden von Flüssigkeitsbehältern. Die Folie ist aus mehreren Lagen 1, 2, 3 aufgebaut. Die obere Folienlage 1 und die untere Folienlage 3 sind elektrisch neutral und die mittlere Folienlage 2 ist leitfähig und in elektrisch getrennte Felder 7, 8 unterteilt. Durch diese Anordnung ist es möglich, beim Auftreten eines Lecks sowohl ein Alarmsignal als auch eine genaue Ortsbestimmung eines Lecks zu erhalten.The invention relates to a composite film 27 for lining liquid containers. The film is made up of several layers 1, 2, 3. The upper film layer 1 and the lower film layer 3 are electrically neutral and the middle film layer 2 is conductive and divided into electrically separated fields 7, 8. This arrangement makes it possible to obtain both an alarm signal and a precise location of a leak when a leak occurs.
Description
3 43 4
Kurzschluß und es fließt Strom, der die Anzeige auslöst. F i g. 3 zeigt eine solche Verbindungsstelle zweier Ver-Short circuit and current flows, which triggers the display. F i g. 3 shows such a junction between two
Vorzugsweise werden jeweils zwei Verbundfolien bundfolien 27 und 27', die aus den oben beschriemittels einer einen rechteckigen Querschnitt aufwei- benen Folienlagen 1,2,3 bzw. 1', 2', 3' aufgebaut sind, senden Deckfolie und einer einen T-formigen Quer- An den Rändern 9, 9' der Verbundfolien sind die elekschnitt aufweisenden Unterfolie verbunden, indem der s trisch leitfahigen Randabschnitte 4 und 4' angeordnet Schenkel der T-fÖrmigen Folie in einen Zwischenraum Die Verbindung geschieht in der Weise, daß auf die bei zwischen den beiden mit elektrisch leitenden Randab- den Verbundfolien 27,27', eine mit einem rechteckigen schnitten versehenen Rändern der zu verbindenden Querschnitt ausgebildete Deck-Folie S. die aus dem-FoI ien von unten eingreift. -selben chemisch beständigen Material wie die Folien 1Preferably two composite foils are bundled foils 27 and 27 ', which are composed of the above-described means one foil layers 1, 2, 3 or 1 ', 2', 3 'with a rectangular cross-section are constructed, send cover sheet and a T-shaped transverse to the edges 9, 9 'of the composite sheets are the elekschnitt having lower film connected by the s trically conductive edge sections 4 and 4 'arranged Leg of the T-shaped film in a space The connection is made in such a way that on the at between the two composite films 27, 27 'with electrically conductive edge strips, one with a rectangular one cut provided edges of the to be connected cross-section formed cover film S. the from the-FoI engages from below. -The same chemically resistant material as the foils 1
Die Verbindung zweier Verbundfoüen geschieht in 1O und 1', besteht, aufgeschweißt oder geklebt ist. Die der Weise, daß die Verbundfoüen auf die Folie mit T- Unterseite der Verbundfolie 27 bzw. 27', wird auf eine formigem Querschnitt aufgeschweißt oder aufgeklebt mit einem T-formigen Querschnitt ausgebildete Unterwerden. Der Schenkel des T verhindert den direkten Folie 6 aufgeschweißt oder geklebt, wobei der Schenkel Kontakt der oben erwähnten elektrisch leitfahigen 28 des T in den Zwischenraum 29 eingefügt ist. Die Randabschnitte. Von oben wird die Nahtstelle durch 15 Leckanzeige geschieht in der Weise, daß an die Leieinen rechteckigen Folienstreifen, der aufgeschweißt tungen 11 und 20 eine elektrische Spannung angelegt oder geklebt ist, verschlossen. wird. Dringt leitfahige Flüssigkeit in den ZwischenraumThe connection of two Verbundfoüen happens in 1O and 1 ', consists, is welded or is glued. the the way that the Verbundfoüen on the film with T-bottom of the composite film 27 or 27 ', is on a shaped cross-section welded or glued on with a T-shaped cross-section formed underneath. The leg of the T prevents the direct film 6 being welded or glued, the leg Contact of the aforementioned electrically conductive 28 of the T is inserted into the space 29. the Edge sections. From above the seam is done by 15 leak detection in such a way that to the leashes rectangular film strip, the welded lines 11 and 20 applied an electrical voltage or glued, closed. will. Conductive liquid penetrates into the space
Von jedem Feld bzw. jedem Randabschnitt führen 29, entsteht ein Kurzschluß an der betreffenden Verbinelektrische Leitungen zu einem Mikrocomputer, der so dungsstelle, so daß ein Strom erzeugt wird, der das Aufeine exakte Ortsbestimmung bei einem auftretenden 20 treten und den Ort der Undichtigkeit meldet Leck vornehmen kann. Fig. 4 zeigt eine Anordnung mehrerer aneinanderge-Leading from each field or each edge section 29 creates a short circuit at the relevant electrical connection Leads to a microcomputer, the so training point, so that a current is generated that the on exact location determination when an occurring 20 occurs and reports the location of the leak Can make leak. Fig. 4 shows an arrangement of several juxtaposed
Die mit der Erfindung erzielten Vorteile bestehen fügter Felder Fl, Fl, F3 mit den entsprechenden Polen darin, daß eine exakte Überwachung der Dichtigkeit der leitfahigen Schichten F3.1/F3.2, Fl.llFl.1 und des Behälters gewährleistet ist. Ferner ist es insbeson- Fl.l/Fl.l. Entlang der Verbindungsstellen Vl und Vl dere möglich, eine genaue lokale Anzeige der Defekt- 25 sind die in der Figur nicht dargestellten Randabschnitte stelle bei einem auftretenden Leck zu bekommen. mit den dazugehörigen Polen Rn3JRl3, R13/R33, The advantages achieved with the invention consist of added fields Fl, Fl, F3 with the corresponding poles in that an exact monitoring of the tightness of the conductive layers F3.1 / F3.2, Fl.llFl.1 and the container is guaranteed. Furthermore, it is especially- Fl.l / Fl.l. Along the joints Vl and Vl particular possible a precise local display of the defect 25, the edge portions are not shown in the figure put to get to a leak occurring. with the associated poles Rn3JRl3, R13 / R33,
Die Erfindung ist anhand von in der Zeichnung dar- RnII'RlJ., R1.1/R33, RnVRlA und Ä2.1/Ä3.1 (fur n gestellten Ausführungsbeispielen nachstehend näher Bahnen) angeordnet. Von den oben genannten Polen erläutert. Es zeigt: führt jeweils eine Leitung zu einem Mikrocomputer, derThe invention is arranged on the basis of RnII'RlJ., R1.1 / R33, RnVR1A and 2.1 / 3.1 (for n exemplary embodiments shown below in more detail paths). Explained by the above poles. It shows: each leads to a microcomputer, the
Fig. 1 eine Schnittansicht einer Verbundfolie, 30 die Rand- bzw. Feldüberwachung in der oben genann-Fig. 1 is a sectional view of a composite film, 30 the edge or field monitoring in the above-mentioned
Fig. 2 eine Draufsicht einer Verbundfolie, ten Weise durchführt, indem er nach frei wählbarenFig. 2 is a plan view of a composite film, performs th way by following freely selectable
F i g. 3 eine Verbindungsstelle zweier Verbundfolien, Zeitintervallen und frei wählbarer Reihenfolge die ein-Fig. 4 einen größeren Bereich von aneinandergefüg- zelnen Meßstellen abfragt und beim Auftreten ein ten Verbundfolien. Alarmsignal mit Ortsangabe auslöst.F i g. 3 a connection point of two composite films, time intervals and freely selectable order the one-Fig. 4 queries a larger area of joined measuring points and, if they occur, a ten composite films. Alarm signal with location information triggers.
Die in F i g. 1 dargestellte Verbundfolie 27 besteht aus 35
drei Folienlagen 1, 2 und 3 mit einem am Rand 9The in F i g. The composite film 27 shown in FIG. 1 consists of 35
three layers of film 1, 2 and 3 with one at the edge 9
angeordneten elektrisch leitfahigen Randabschnitt 4. arranged electrically conductive edge section 4.
Die untere Folie 3 liegt an der Behälterinnenwand an Hierzu 3 Blatt ZeichnungenThe lower film 3 lies on the inside wall of the container on 3 sheets of drawings
und besteht au^ einem isolierfahigen Material mit and consists of an insulating material with
erhöhter Reißdehnung. Die obere Folie 1 ist der Behäl- 40
terflüssigkeit zugekehrt und weist sich durch eine
besonders hohe Beständigkeit gegen chemische Reaktionen aus. Die mittlere Folienlage 2 ist elektrisch leitfähig
und hat den in Fig. 2 ersichtlichen Aufbau.increased elongation at break. The upper film 1 is the container 40
facing the liquid and shows itself through a
particularly high resistance to chemical reactions. The middle film layer 2 is electrically conductive and has the structure shown in FIG.
In Fig. 2 ist die Verbundfolie 27 in Draufsicht gezeigt. 45
Die leitende Schicht 2 besteht aus zwei Feldern 7 und 8,
die voneinander elektrisch getrennt sind. Das rechte
Feld 8 zeigt eine mögliche Anordnung der elektrischen
Leitungen. Das Feld 8 besteht aus zwei Leiternetzwerken 25 und 26, die jeweils mehrere Leiterbahnen 21 50
bzw. 22 und je eine Sammelleitung 23 bzw. 24 aufweisen. Die Leiterbahnen 21 und 22 sind kammartig
ineinandergeschachtelt und führen jeweils an die Sammelleitungen 23 bzw. 24, die an die Pole 30 und 31 geleitet
werden. Entsprechend ist das Feld 7, welches in der 55
Zeichnung nicht näher ausgeführt ist, aufgebaut. Die
Leckanzeige geschieht in der Weise, daß an die Pole 30
und 31 eine elektrische Spannung angelegt wird. Dringt
eine entsprechende Menge von leitfähiger oder leitfähig
gemachter Behälterflüssigkeit zwischen zwei benach- 60
harten Leiterbahnen 21 und 22 ein, wird ein Kurzschluß
ausgelöst und ein meßbarer Strom erzeugt, der ein
Warnsignal und die Ortsanzeige auslösen kann. An den
Rändern 9, 10 der Verbundfolie 27 sind elektrisch leitfahige Randabschnitte 13,14,15 und 16 angebracht, die 65
jeweils mit den Polen 17,18,19 und 20 verbunden sind.
Diese Randabschnitte dienen zur Lecküberwachung
der Verbindungsstelle von zwei Verbundfolien.In Fig. 2, the composite film 27 is shown in plan view. 45
The conductive layer 2 consists of two fields 7 and 8,
which are electrically separated from each other. The right
Field 8 shows a possible arrangement of the electrical
Cables. The field 8 consists of two conductor networks 25 and 26, each of which has a plurality of conductor tracks 21 50
or 22 and each have a collecting line 23 and 24, respectively. The conductor tracks 21 and 22 are comb-like
nested one inside the other and each lead to the bus lines 23 and 24, which are routed to the poles 30 and 31. Correspondingly, the field 7, which is in the 55th
Drawing is not detailed, built up. the
Leak detection is done in such a way that the pole 30
and 31 an electric voltage is applied. Urges
a corresponding amount of conductive or conductive
made container liquid between two adjacent 60
hard conductor tracks 21 and 22 a short circuit
triggered and a measurable current generated that a
Warning signal and the location display can trigger. To the
Electrically conductive edge sections 13, 14, 15 and 16 are attached to the edges 9, 10 of the composite film 27, the 65
respectively connected to poles 17,18,19 and 20.
These edge sections are used to monitor leaks
the junction of two composite foils.
Claims (1)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3322772A DE3322772C2 (en) | 1983-06-24 | 1983-06-24 | Composite film for lining liquid containers |
CH2268/84A CH665614A5 (en) | 1983-06-24 | 1984-05-09 | COMPOSITE FILM FOR LINING LIQUID CONTAINERS. |
IT48287/84A IT1177770B (en) | 1983-06-24 | 1984-05-30 | COMPOSITE SHEET MATERIAL FOR COATING LIQUID CONTAINERS |
FR8409237A FR2549017B1 (en) | 1983-06-24 | 1984-06-13 | COMPOSITE SHEET FOR COATING LIQUID TANKS, WITH LEAK DETECTION MEANS |
GB08415371A GB2143174B (en) | 1983-06-24 | 1984-06-15 | Composite sheet for lining liquid containers |
NL8401937A NL8401937A (en) | 1983-06-24 | 1984-06-18 | A COMPOSITION FOIL FOR CLADING A LIQUID HOLDER. |
BE0/213190A BE899980A (en) | 1983-06-24 | 1984-06-21 | COMPOSITE SHEET FOR COATING CONTAINERS FOR LIQUIDS. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3322772A DE3322772C2 (en) | 1983-06-24 | 1983-06-24 | Composite film for lining liquid containers |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3322772A1 DE3322772A1 (en) | 1985-01-10 |
DE3322772C2 true DE3322772C2 (en) | 1986-05-22 |
Family
ID=6202289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3322772A Expired DE3322772C2 (en) | 1983-06-24 | 1983-06-24 | Composite film for lining liquid containers |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE899980A (en) |
CH (1) | CH665614A5 (en) |
DE (1) | DE3322772C2 (en) |
FR (1) | FR2549017B1 (en) |
GB (1) | GB2143174B (en) |
IT (1) | IT1177770B (en) |
NL (1) | NL8401937A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4125524A1 (en) * | 1991-08-01 | 1993-02-04 | Tuma Josef | STORAGE CONTAINERS FOR FLAMMABLE LIQUIDS |
DE4316436A1 (en) * | 1993-05-17 | 1994-11-24 | Braas Gmbh | Composite film for the electrical location of a leak |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2569847B1 (en) * | 1984-08-31 | 1988-02-05 | Thomson Csf | DEVICE FOR DETECTION AND LOCATION OF WATER INLET FOR MARINE FLUTE |
DE4125430C2 (en) * | 1991-08-01 | 1997-01-30 | Frank Deponietechnik Gmbh | Arrangement of tightness controllable sealing sheets made of plastic, especially for landfills |
DE4213070A1 (en) * | 1992-04-21 | 1993-10-28 | Ingbuero Rinne Und Partner | Twin spaced apart conductor system for capacitance or resistance monitoring of land fill leakage - has sites which have been sealed against random losses of leachate |
GB2287817A (en) * | 1994-03-19 | 1995-09-27 | Lee Forbes | Monitoring vessel integrity |
DE19512434A1 (en) * | 1995-04-03 | 1996-10-10 | Ullrich Dipl Ing Stein | Protective coating checking device for fault location |
HU226650B1 (en) * | 2004-11-30 | 2009-05-28 | Vils Ag H | System for detecting damage of a coating or/and inner side coated wall bordering a room suitable for containing material and method for producing thereof |
DE102011112228A1 (en) * | 2011-09-01 | 2013-03-07 | Martin Wolf | Method for temporal and/or aerial detection of cracks in structural component e.g. rotor blade, involves applying conductive liquid on component so that conductive structures are electrically connected when crack is formed |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7627844U1 (en) * | 1900-01-01 | Wilhelm Reisgies Kg, 5090 Leverkusen | ||
DE1931748U (en) * | 1965-08-05 | 1966-01-27 | Aerotronic Entwicklungen John | ELECTRONIC LEAK WARNING DEVICE. |
US3383863A (en) * | 1966-08-03 | 1968-05-21 | Joe R. Berry | Pond, tank and pit liner and method of detecting leaks |
CA990413A (en) * | 1972-07-17 | 1976-06-01 | E. Curtis Johnson | Low modulus film as a barrier to prevent flow of adhesive into recessed areas in flexible circuits |
US3819443A (en) * | 1973-01-15 | 1974-06-25 | Sun Chemical Corp | Method for making multifinned shielding tapes |
US3878362A (en) * | 1974-02-15 | 1975-04-15 | Du Pont | Electric heater having laminated structure |
IT1038547B (en) * | 1975-05-28 | 1979-11-30 | Pirelli | PROCEDURE AND EQUIPMENT FOR THE PRODUCTION OF ELEMENTS THUS PRODUCED |
GB1580740A (en) * | 1977-06-28 | 1980-12-03 | Haley & Weller Ltd | Electrical contact panels |
JPS5988634A (en) * | 1982-11-12 | 1984-05-22 | Hitachi Ltd | Leak detecting apparatus for lining tank |
-
1983
- 1983-06-24 DE DE3322772A patent/DE3322772C2/en not_active Expired
-
1984
- 1984-05-09 CH CH2268/84A patent/CH665614A5/en not_active IP Right Cessation
- 1984-05-30 IT IT48287/84A patent/IT1177770B/en active
- 1984-06-13 FR FR8409237A patent/FR2549017B1/en not_active Expired
- 1984-06-15 GB GB08415371A patent/GB2143174B/en not_active Expired
- 1984-06-18 NL NL8401937A patent/NL8401937A/en not_active Application Discontinuation
- 1984-06-21 BE BE0/213190A patent/BE899980A/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4125524A1 (en) * | 1991-08-01 | 1993-02-04 | Tuma Josef | STORAGE CONTAINERS FOR FLAMMABLE LIQUIDS |
DE4316436A1 (en) * | 1993-05-17 | 1994-11-24 | Braas Gmbh | Composite film for the electrical location of a leak |
Also Published As
Publication number | Publication date |
---|---|
GB2143174B (en) | 1987-04-29 |
FR2549017A1 (en) | 1985-01-18 |
BE899980A (en) | 1984-10-15 |
GB2143174A (en) | 1985-02-06 |
GB8415371D0 (en) | 1984-07-18 |
CH665614A5 (en) | 1988-05-31 |
NL8401937A (en) | 1985-01-16 |
DE3322772A1 (en) | 1985-01-10 |
IT8448287A0 (en) | 1984-05-30 |
IT1177770B (en) | 1987-08-26 |
FR2549017B1 (en) | 1987-01-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |