GB1522236A - Tubular structure for conveying fluids - Google Patents

Tubular structure for conveying fluids

Info

Publication number
GB1522236A
GB1522236A GB50104/76A GB5010476A GB1522236A GB 1522236 A GB1522236 A GB 1522236A GB 50104/76 A GB50104/76 A GB 50104/76A GB 5010476 A GB5010476 A GB 5010476A GB 1522236 A GB1522236 A GB 1522236A
Authority
GB
United Kingdom
Prior art keywords
pipe
tubular structure
conveying fluids
pipeline
medium
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
Application number
GB50104/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KM Kabelmetal AG filed Critical KM Kabelmetal AG
Publication of GB1522236A publication Critical patent/GB1522236A/en
Expired legal-status Critical Current

Links

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
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/145—Arrangements for the insulation of pipes or pipe systems providing fire-resistance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/103—Metal fibres
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/043—HDPE, i.e. high density polyethylene
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Thermal Insulation (AREA)

Abstract

The wall of the pipeline is constructed from a plurality of heat-insulating layers. It is intended to ensure that at least that part of the pipeline which is in contact with the medium is largely chemically resistant. For this reason, at least one layer of the pipe wall, preferably the layer which comes into contact with the medium, that is to say the inner pipe (1), consists of a material which is wetted by moisture and is based on thermoplastics, elastomers or thermoplastic rubbers. A pipe consisting of polypropylene is used, for example, as the outer pipe (2). <IMAGE>
GB50104/76A 1975-12-06 1976-12-01 Tubular structure for conveying fluids Expired GB1522236A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752555017 DE2555017A1 (en) 1975-12-06 1975-12-06 TUBE-SHAPED STRUCTURE FOR TRANSPORTING LIQUID OR GAS-SHAPED MEDIA, ESPECIALLY AT HIGH TEMPERATURES AND HIGH PRESSURE

Publications (1)

Publication Number Publication Date
GB1522236A true GB1522236A (en) 1978-08-23

Family

ID=5963724

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50104/76A Expired GB1522236A (en) 1975-12-06 1976-12-01 Tubular structure for conveying fluids

Country Status (15)

Country Link
JP (1) JPS5292918A (en)
AR (1) AR210524A1 (en)
AT (1) AT351324B (en)
BE (1) BE849100A (en)
CH (1) CH623390A5 (en)
DE (1) DE2555017A1 (en)
DK (1) DK530976A (en)
ES (1) ES453874A1 (en)
FI (1) FI763492A (en)
FR (1) FR2334042A1 (en)
GB (1) GB1522236A (en)
IT (1) IT1073781B (en)
NL (1) NL7613549A (en)
NO (1) NO764127L (en)
SE (1) SE7613652L (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046617A1 (en) * 1980-08-27 1982-03-03 Wavin B.V. Spacer means for an insulated plastics pipe and composite pipe
GB2275652A (en) * 1993-02-25 1994-09-07 A I Covers Limited Passive fire protection.
GB2280941A (en) * 1993-08-09 1995-02-15 Victaulic Plc Pipes
FR2797673A1 (en) * 1999-08-19 2001-02-23 Coutier Moulage Gen Ind Three-layer plastic tube for engine coolant circuit, has extruded layers joined with no supplementary connecting layers
ES2403145A1 (en) * 2011-11-08 2013-05-14 Abn Pipe Systems, S.L.U. Insulating pipework for geothermal applications
US9453598B2 (en) 2006-05-26 2016-09-27 Borealis Technology Oy Coated pipe comprising polyolefin layer with enhanced adhesion
WO2018142079A1 (en) 2017-02-02 2018-08-09 Tristone Flowtech Solutions (Tfs) Fluid circulation pipe for motor vehicle, method for manufacturing same and use thereof as motor vehicle engine coolant hose

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8005255A (en) * 1980-09-19 1982-04-16 Wavin Bv PLASTIC TUBE PART PROVIDED WITH A PLASTIC FOAM INSULATION LAYER.
DE3325321A1 (en) * 1983-07-13 1985-01-24 PVG Patentverwertungsgesellschaft mbH, 5164 Nörvenich Process for producing a diffusion-tight plastics tube
JPH0232515B2 (en) * 1983-10-27 1990-07-20 Toyoda Gosei Kk PURASUCHITSUKUHOOSUNOSEIZOHOHO
DE3446033A1 (en) * 1984-12-18 1986-07-03 B. Braun Melsungen Ag, 3508 Melsungen IMPLANTABLE INTRAPERITONEAL CATHETER
FR2589786B1 (en) * 1985-11-12 1987-12-24 Caoutchouc Manuf Plastique FLEXIBLE MULTI-LAYER COMPOSITION OF SOUND AND THERMAL INSULATION FOR SELF-SUPPORTING STRUCTURES AND ITS APPLICATIONS
EP0276584A1 (en) * 1987-01-29 1988-08-03 Caoutchouc Manufacturé et Plastiques Société Anonyme dite: Flexible multilayer composite structure for acoustic and thermal insulation of self-supporting structures, and applications
DE3639417C1 (en) * 1986-11-18 1987-11-26 Mannesmann Ag Process for encasing objects made of steel with plastic
AT391008B (en) * 1988-05-11 1990-08-10 Poloplast Kunststoffwerk PLASTIC PIPE OR PIPE MOLDING
AT393011B (en) * 1988-07-22 1991-07-25 Raimund Harreither Heizungs Un Pipe element
CH677394A5 (en) * 1988-09-06 1991-05-15 Symalit Ag
DE3840750A1 (en) * 1988-12-03 1990-06-07 Tecalemit Gmbh Deutsche PLASTIC PART FOR FLAMMABLE MEDIA WITH FLAME RETARDANT AND METHOD FOR THE PRODUCTION THEREOF
BR8806879A (en) * 1988-12-26 1990-10-30 Colognori Umberto FLOOR FOR CONTAINERS AND VEHICLE BODYWORK IN GENERAL
IT219178Z2 (en) * 1989-12-20 1992-12-17 F.I.S.T. S.P.A. FLEXIBLE CONDUCT FOR CIRCUITS OF CIRCULATION OF THE COOLANT LIQUID OF A VEHICLE ENGINE.
EP0542315A1 (en) * 1991-11-15 1993-05-19 Hewing GmbH Pipe for conveying cold or hot fluids
FI96396C (en) * 1992-12-28 1996-06-25 Uponor Bv Process for forming a double-layered plastic tube for material transport and a double-layered plastic tube formed by the method
EP0638749B1 (en) * 1993-08-09 1998-06-17 Victaulic Plc Improvements in or relating to pipes
DE29622414U1 (en) * 1996-12-24 1997-04-03 Rehau Ag + Co, 95111 Rehau Thermoplastic pipe
DE29713786U1 (en) * 1997-08-02 1997-09-25 Rehau Ag + Co, 95111 Rehau Thermoplastic pipe
CN107143726A (en) * 2017-05-18 2017-09-08 四川森洁燃气设备有限公司 A kind of erosion resistant fuel gas transportation pipeline

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1723793U (en) * 1955-11-30 1956-06-07 Rudolf Darmstadt INSULATING TUBE, IN PARTICULAR FOR THE PROMOTION OF COLD-STOCKING TECHNICAL OIL.
US2971538A (en) * 1958-01-31 1961-02-14 Moore & Co Samuel Extruded tubing
CH434716A (en) * 1965-12-13 1967-04-30 Schaerer Andre Ing Dr Plastic pipe
US3447572A (en) * 1966-11-08 1969-06-03 Exxon Research Engineering Co Reinforced thermoset plastic pipe
GB1234034A (en) * 1967-08-31 1971-06-03
US3565119A (en) * 1968-10-25 1971-02-23 Koch Ind Inc Filament wound reinforced pipe having a vinyl ester resin inner lining
US3740958A (en) * 1971-01-19 1973-06-26 S Cadwell Method of fabricating and installing a submergible pipeline
CA1033311A (en) * 1974-02-14 1978-06-20 Aeroquip Corporation Pressurized hydraulic fluid system using cross-linked chlorinated polyethylene hose
DE2411141A1 (en) * 1974-03-08 1975-09-18 Kabel Metallwerke Ghh Sheathing cable cores in thermoplastics crosslinked by moisture - additives fed into high speed mixer and diffused uniformly
CA1030883A (en) * 1974-11-11 1978-05-09 Hans A. Johansen Dimensionally stable, flexible hydraulic hose having improved chemical and temperature resistance
ES443507A1 (en) * 1975-12-16 1977-05-01 Casals Roca Umbert Ana Maria Improvements in the manufacture of textile hoses. (Machine-translation by Google Translate, not legally binding)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046617A1 (en) * 1980-08-27 1982-03-03 Wavin B.V. Spacer means for an insulated plastics pipe and composite pipe
GB2275652A (en) * 1993-02-25 1994-09-07 A I Covers Limited Passive fire protection.
GB2280941A (en) * 1993-08-09 1995-02-15 Victaulic Plc Pipes
GB2280941B (en) * 1993-08-09 1997-08-06 Victaulic Plc Improvements in or relating to pipes
FR2797673A1 (en) * 1999-08-19 2001-02-23 Coutier Moulage Gen Ind Three-layer plastic tube for engine coolant circuit, has extruded layers joined with no supplementary connecting layers
US9453598B2 (en) 2006-05-26 2016-09-27 Borealis Technology Oy Coated pipe comprising polyolefin layer with enhanced adhesion
ES2403145A1 (en) * 2011-11-08 2013-05-14 Abn Pipe Systems, S.L.U. Insulating pipework for geothermal applications
WO2013068612A1 (en) * 2011-11-08 2013-05-16 Abn Pipe Systems, S.L.U. Insulating pipework for geothermal applications
WO2018142079A1 (en) 2017-02-02 2018-08-09 Tristone Flowtech Solutions (Tfs) Fluid circulation pipe for motor vehicle, method for manufacturing same and use thereof as motor vehicle engine coolant hose

Also Published As

Publication number Publication date
SE7613652L (en) 1977-06-07
FI763492A (en) 1977-06-07
CH623390A5 (en) 1981-05-29
NO764127L (en) 1977-06-07
IT1073781B (en) 1985-04-17
JPS5292918A (en) 1977-08-04
NL7613549A (en) 1977-06-08
FR2334042A1 (en) 1977-07-01
DK530976A (en) 1977-06-07
ATA898376A (en) 1978-12-15
AT351324B (en) 1979-07-25
AR210524A1 (en) 1977-08-15
BE849100A (en) 1977-06-06
DE2555017A1 (en) 1977-06-08
ES453874A1 (en) 1977-11-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee