US20120178321A1 - Method for producing a metallised fabric, and resulting fabric - Google Patents

Method for producing a metallised fabric, and resulting fabric Download PDF

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Publication number
US20120178321A1
US20120178321A1 US13/388,105 US201013388105A US2012178321A1 US 20120178321 A1 US20120178321 A1 US 20120178321A1 US 201013388105 A US201013388105 A US 201013388105A US 2012178321 A1 US2012178321 A1 US 2012178321A1
Authority
US
United States
Prior art keywords
substrate
fabric
metallization
yarns
metal
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
Application number
US13/388,105
Inventor
Jean-Claude Brunswick
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.)
Brunswick et Fils SA
Original Assignee
Brunswick et Fils SA
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 Brunswick et Fils SA filed Critical Brunswick et Fils SA
Assigned to BRUNSWICK & FILS reassignment BRUNSWICK & FILS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRUNSWICK, JEAN-CLAUDE
Publication of US20120178321A1 publication Critical patent/US20120178321A1/en
Abandoned legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/20—Metallic material, boron or silicon on organic substrates
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/06—Inorganic compounds or elements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/84—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising combined with mechanical treatment
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/32—Polyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/25—Resistance to light or sun, i.e. protection of the textile itself as well as UV shielding materials or treatment compositions therefor; Anti-yellowing treatments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3382—Including a free metal or alloy constituent
    • Y10T442/3398—Vapor or sputter deposited metal layer

Definitions

  • the present invention relates to a method for producing a metallized fabric and to any type of fabric which can be obtained by applying such a method.
  • Metallized fabrics have many applications, in particular in the field of protective clothing and infrared reflector devices forming a heat shield.
  • infrared reflector devices such as curtains or blinds are highly advantageous insofar as they serve to limit heat losses in winter at the windows of premises, and to protect against heat in summer.
  • the material thus prepared nevertheless has the drawback of being stiff and unpleasant to the touch.
  • the minimum is 30 filaments per yarn.
  • the use of fine strands serves to increase the luster of the substrate and thus to increase the luster of the metallized fabric.
  • a yarn having a weight of 50 decitex in the warp and filling directions and comprising 36 filaments is used.
  • the yarns used are flat, neither textured nor twisted.
  • the woven substrate used also called fabric, is based on synthetic fibers.
  • the woven substrate may be based on microfibers, that is to say fibers having more than 100 filaments per decitex, or fine strands, that is to say fibers close to 100 filaments per decitex.
  • the use of synthetic fibers serves to have a material that can at least partially melt, without burning.
  • the use of microfibers or fine strands serves to preserve the flexibility of the fabric.
  • the weave of the yarns is dense and very tight.
  • the woven substrate comprises at least 42 warp yarns and 40 filling yarns per centimeter. Even more preferably, the woven substrate comprises 44 warp yarns and 41 filling yarns per centimeter.
  • the fabric washing step is also called desizing.
  • a size deposit is applied to the yarns before they are woven. It is advantageous, particularly to preserve the flexibility of the product, to remove this size.
  • Calendering is carried out in one or more successive passes on one or on both sides of the substrate, during which a compressive force is applied hot to the fabric.
  • the objective is to remove part of the air present in the fabric. It is found that a vacuum pressure of 2.3 ⁇ 10 ⁇ 3 (value higher than 2.4 ⁇ 10 ⁇ 2 ) is required for carrying out the metallization phase.
  • the construction that is to say the overall properties of the fabric, and the treatments carried out on the fabric make it possible to remain below this value.
  • the metallization phase takes place under vacuum at a rate of 420 m/minute, in particular, by metal vapor deposition.
  • the metal deposited may, for example, be aluminum or silver.
  • the fiber to be treated was in the form of a strip that entered the vacuum deposition apparatus. As the strip of fabric passed through the machine, measurements were taken of the pressure in the vacuum chamber. The following results were obtained:
  • the vacuum deposition apparatus malfunctioned when the vacuum became too low.
  • the aim is not to exceed a pressure of 4 ⁇ 10 ⁇ 2 bar.
  • the aim is not to exceed a pressure of 2.3 ⁇ 10 ⁇ 3 bar.
  • the warp yarn comprised 100% polyester. It was a flat semi-matte yarn comprising between 44 and 50 filaments per decitex for 43 yarns/cm.
  • the filling yarn also comprised 100% polyester. It was a flat semi-matte yarn comprising between 44 and 50 filaments per decitex for 43 yarns/cm.
  • the weave consisted of a taffeta-type toile.
  • Desizing takes place by washing at 85° C. in alkaline medium at pH 8/8.5 using surfactants and sequestering agents by a technique known to a person skilled in the art.
  • Calendering is then carried out at a rate of 15 meters/minute under 80 tonnes at a temperature of 195° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The invention relates to a method for producing a metallised fabric, including a step of washing a woven substrate, the method including, after the washing step, the following steps: calendering the substrate by applying a compression force to the substrate, and vacuum-metallising the substrate in a rarefied atmosphere by depositing metal particles so as to form a layer of metal on the substrate.

Description

  • The present invention relates to a method for producing a metallized fabric and to any type of fabric which can be obtained by applying such a method.
  • Metallized fabrics have many applications, in particular in the field of protective clothing and infrared reflector devices forming a heat shield.
  • In a context of energy conservation, infrared reflector devices such as curtains or blinds are highly advantageous insofar as they serve to limit heat losses in winter at the windows of premises, and to protect against heat in summer.
  • Existing solutions generally comprise the combination of a fabric support and a metal film, obtained by bonding.
  • The material thus prepared nevertheless has the drawback of being stiff and unpleasant to the touch.
  • The research of the inventor in this field has led him to investigate the advantage of applying the metallization technique, commonly used in the field of packaging, to coat fabrics.
  • It thus appeared that by treating certain types of fabric, before metallizing them, it was possible to obtain a novel product meeting the requisite specifications, in particular for the abovementioned applications.
  • It is therefore the object of the invention to provide a method for producing a metallized fabric that has, in particular, a pleasant texture and improved flexibility, while having thermal insulation properties.
  • It also relates, as novel products, to the fabrics obtained and to their applications.
  • The method for producing a metallized fabric of the invention is characterized in that it comprises the steps of:
      • washing a woven substrate in order to remove the size previously applied to the fabric during its manufacture,
      • optionally, dyeing or printing the fabric,
      • calendering the substrate by applying a compressive force at high temperature,
      • vacuum metallization of the substrate by deposition of a metal layer in a rarefied atmosphere,
        the woven substrate comprising yarns having a maximum weight of 70 decitex, both in the warp direction and in the weft or filling direction, with a minimum of 42 filaments per yarn.
  • In the case of the use of yarns having a weight of 50 decitex, the minimum is 30 filaments per yarn.
  • The use of fine strands serves to increase the luster of the substrate and thus to increase the luster of the metallized fabric. Preferably, a yarn having a weight of 50 decitex in the warp and filling directions and comprising 36 filaments is used.
  • The yarns used are flat, neither textured nor twisted.
  • The tests performed by the inventor have demonstrated that the use of a woven substrate, commonly called a fabric, is essential for achieving the desired flexibility.
  • Preferably, the woven substrate used, also called fabric, is based on synthetic fibers.
  • The woven substrate may be based on microfibers, that is to say fibers having more than 100 filaments per decitex, or fine strands, that is to say fibers close to 100 filaments per decitex.
  • The use of synthetic fibers serves to have a material that can at least partially melt, without burning. The use of microfibers or fine strands serves to preserve the flexibility of the fabric.
  • The weave of the yarns is dense and very tight. Preferably, the woven substrate comprises at least 42 warp yarns and 40 filling yarns per centimeter. Even more preferably, the woven substrate comprises 44 warp yarns and 41 filling yarns per centimeter.
  • The fabric washing step is also called desizing. In fact, in the usual fabric manufacturing techniques, a size deposit is applied to the yarns before they are woven. It is advantageous, particularly to preserve the flexibility of the product, to remove this size.
  • In order to obtain optimal desizing, it is possible to carry out two desizing passes, using caustic soda during one of the two passes.
  • Calendering is carried out in one or more successive passes on one or on both sides of the substrate, during which a compressive force is applied hot to the fabric.
  • One pass at 15 m/minute on each side at a temperature of 195° C. and with a force of 80 tonnes serves to obtain the desired effect.
  • The objective is to remove part of the air present in the fabric. It is found that a vacuum pressure of 2.3×10−3 (value higher than 2.4×10−2) is required for carrying out the metallization phase. The construction, that is to say the overall properties of the fabric, and the treatments carried out on the fabric make it possible to remain below this value.
  • The metallization phase takes place under vacuum at a rate of 420 m/minute, in particular, by metal vapor deposition. The metal deposited may, for example, be aluminum or silver.
  • It is found that the metallization machines generally used are unsuitable for metallizing large lengths of substrate. The vacuum becomes insufficient and the machine stalls.
  • It is necessary to use a specific method to remedy this. 200-meter strips of substrate are alternated and placed end to end with 500-meter strips of polyester film to form a continuous strip that is introduced into the metallization machine. This serves to prevent the machine stalling from by loss of vacuum. During the passage of the strips of polyester film, serving as primer, the travel speed is reduced to 180 meters/minute in order to restore the vacuum.
  • It may be necessary to make one or more preventive interruptions to restore the vacuum, during the passage of the strip, in order to prevent the machine from stalling.
  • As an alternative, it is possible to use a specific metallization machine, comprising a plurality of vacuum chambers.
    • EXAMPLE 1
  • A vacuum deposition test was performed. The fiber to be treated was in the form of a strip that entered the vacuum deposition apparatus. As the strip of fabric passed through the machine, measurements were taken of the pressure in the vacuum chamber. The following results were obtained:
  • The vacuum present at the start, before the passage of the fabric, had a pressure of 3.2×10−4 bar.
  • After the passage of 500 m of a strip of polyester film, a pressure of 4×10−4 bar was measured.
  • After the passage of 200 m of fabric after the primer, a pressure of 1×10−2 bar was measured.
  • After the passage of a second 500 m strip of polyester film, the vacuum was restored at 5.9×10−4 bar.
  • It was also found that the vacuum deposition apparatus malfunctioned when the vacuum became too low. As a consequence, in the case of a fabric based on textured microfiber, the aim is not to exceed a pressure of 4×10−2 bar. In the case of an untextured fine strand, the aim is not to exceed a pressure of 2.3×10−3 bar.
    • EXAMPLE 2
  • Tests were performed by the inventor, demonstrating the feasible nature of the inventive method. The characteristics of the fabric used are given below:
  • The warp yarn comprised 100% polyester. It was a flat semi-matte yarn comprising between 44 and 50 filaments per decitex for 43 yarns/cm.
  • The filling yarn also comprised 100% polyester. It was a flat semi-matte yarn comprising between 44 and 50 filaments per decitex for 43 yarns/cm.
  • The weave consisted of a taffeta-type toile.
  • The steps of the method are then carried out as follows:
  • Desizing takes place by washing at 85° C. in alkaline medium at pH 8/8.5 using surfactants and sequestering agents by a technique known to a person skilled in the art.
  • Calendering is then carried out at a rate of 15 meters/minute under 80 tonnes at a temperature of 195° C.
  • Finally, the vacuum metallization takes place at a maximum pressure of 2.3×10−3 bar.

Claims (10)

1-9. (canceled)
10. A method for producing a metallized fabric, the method comprising:
first washing a woven substrate comprising yarns having a maximum weight of 70 decitex in the warp direction and in the weft or filling direction; then
calendering the substrate by applying a compressive force to the substrate; and
performing vacuum metallization on the substrate, by deposition of metal particles to form a layer of metal on the substrate, in a rarefied atmosphere.
11. The method as claimed in claim 10, wherein the substrate comprises synthetic fibers.
12. The method as claimed in claim 10, wherein the substrate comprises microfibers.
13. The method as claimed in claim 10, wherein the woven substrate comprises at least 42 warp yarns and 40 filling yarns per centimeter.
14. The method as claimed in claim 10, wherein calendering the substrate comprises at least one pass for each side of the substrate.
15. The method as claimed in claim 10, wherein performing vaccum metallization includes performing metal vapor deposition.
16. The method as claimed in claim 10, wherein the formed layer of metal is aluminum.
17. The method as claimed in claim 10, wherein during vacuum metallization, strips of substrate are alternated and placed end to end with strips of film to form a continuous strip that is introduced into the metallization machine.
18. A metallized fabric that can be obtained by applying the method as claimed in claim 10.
US13/388,105 2009-08-07 2010-08-09 Method for producing a metallised fabric, and resulting fabric Abandoned US20120178321A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR09/03899 2009-08-07
FR0903899A FR2948947B1 (en) 2009-08-07 2009-08-07 PROCESS FOR PRODUCING METALLIC TISSUE AND FABRIC OBTAINED
PCT/IB2010/053587 WO2011016015A2 (en) 2009-08-07 2010-08-09 Method for producing a metallised fabric, and resulting fabric

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/053587 A-371-Of-International WO2011016015A2 (en) 2009-08-07 2010-08-09 Method for producing a metallised fabric, and resulting fabric

Related Child Applications (1)

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US14/824,365 Continuation US9758926B2 (en) 2009-08-07 2015-08-12 Method for producing a metallised fabric, and resulting fabric

Publications (1)

Publication Number Publication Date
US20120178321A1 true US20120178321A1 (en) 2012-07-12

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Application Number Title Priority Date Filing Date
US13/388,105 Abandoned US20120178321A1 (en) 2009-08-07 2010-08-09 Method for producing a metallised fabric, and resulting fabric
US14/824,365 Active US9758926B2 (en) 2009-08-07 2015-08-12 Method for producing a metallised fabric, and resulting fabric

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/824,365 Active US9758926B2 (en) 2009-08-07 2015-08-12 Method for producing a metallised fabric, and resulting fabric

Country Status (7)

Country Link
US (2) US20120178321A1 (en)
EP (1) EP2462274B1 (en)
CN (1) CN102549211A (en)
CA (1) CA2769870C (en)
ES (1) ES2610144T3 (en)
FR (1) FR2948947B1 (en)
WO (1) WO2011016015A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9475260B2 (en) 2012-02-02 2016-10-25 Brunswick Et Fils Sound insulation
US11439191B2 (en) * 2018-05-16 2022-09-13 Nike, Inc. Textiles and garments having thermo-reflective material

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700035668A1 (en) * 2017-03-31 2018-10-01 Rubelli S P A ELEMENT OF FURNITURE WITH FABRIC INTEGRATED IN ITS INTERNAL AND RELATIVE METHOD OF REALIZING A FURNITURE ELEMENT
IT202000017359A1 (en) 2020-07-16 2022-01-16 Saati Spa FABRIC IN SYNTHETIC MATERIAL WITH IMPROVED OPTICAL TRANSPARENCY EFFECT

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6787488B2 (en) * 2000-03-29 2004-09-07 Seiren Co., Ltd. Electrically conductive fabric

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Publication number Priority date Publication date Assignee Title
US6787488B2 (en) * 2000-03-29 2004-09-07 Seiren Co., Ltd. Electrically conductive fabric

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9475260B2 (en) 2012-02-02 2016-10-25 Brunswick Et Fils Sound insulation
US11439191B2 (en) * 2018-05-16 2022-09-13 Nike, Inc. Textiles and garments having thermo-reflective material

Also Published As

Publication number Publication date
FR2948947B1 (en) 2014-03-21
CA2769870A1 (en) 2011-02-10
US20150345074A1 (en) 2015-12-03
FR2948947A1 (en) 2011-02-11
WO2011016015A2 (en) 2011-02-10
CN102549211A (en) 2012-07-04
US9758926B2 (en) 2017-09-12
CA2769870C (en) 2018-05-22
ES2610144T3 (en) 2017-04-26
WO2011016015A3 (en) 2011-05-05
EP2462274A2 (en) 2012-06-13
EP2462274B1 (en) 2016-10-05

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AS Assignment

Owner name: BRUNSWICK & FILS, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BRUNSWICK, JEAN-CLAUDE;REEL/FRAME:027898/0229

Effective date: 20120207

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION