AU572168B2 - Laminated glass - Google Patents

Laminated glass

Info

Publication number
AU572168B2
AU572168B2 AU30454/84A AU3045484A AU572168B2 AU 572168 B2 AU572168 B2 AU 572168B2 AU 30454/84 A AU30454/84 A AU 30454/84A AU 3045484 A AU3045484 A AU 3045484A AU 572168 B2 AU572168 B2 AU 572168B2
Authority
AU
Australia
Prior art keywords
degrees
isocyanate
polyurethane
polyol
dan
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.)
Ceased
Application number
AU30454/84A
Other versions
AU3045484A (en
Inventor
Jean-Louis Bravet
Daniel Colmon
Gerard Daude
Michel-Jean Moncheaux
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.)
Saint Gobain Vitrage SA
Original Assignee
Saint Gobain Vitrage 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 Saint Gobain Vitrage SA filed Critical Saint Gobain Vitrage SA
Publication of AU3045484A publication Critical patent/AU3045484A/en
Application granted granted Critical
Publication of AU572168B2 publication Critical patent/AU572168B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/7806—Nitrogen containing -N-C=0 groups
    • C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
    • C08G18/7825—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing ureum groups
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/1077—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing polyurethane
    • 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
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • 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
    • B32B2375/00—Polyureas; Polyurethanes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Glass Compositions (AREA)
  • Surface Treatment Of Glass (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Optical Communication System (AREA)
  • Jib Cranes (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

1. A laminated pane comprising a glass sheet, a transparent intermediate layer based on polyurethane having energy-absorbing properties, and a transparent coating layer of self-healing plastics material, notably based on a thermosetting polyurethane, characterised in that the intermediate layer based on polyurethane having energy-absorbing properties is formed essentially of a polyurethane obtained by reactive casting on a flat horizontal support of a reaction mixture of an isocyanate component of viscosity less than 5 Pas at 40 degrees C and a polyol component, the isocyanate component comprising at least one aliphatic or cycloaliphatic di-isocyanate or an isocyanate prepolymer, the isocyanate component containing urea functions, the content of urea being up to 10% of the total weight of isocyanate component, the content of urea preferably being from 5 to 7%, the polyol component comprising at least one long difunctional polyol of molecular weight from 500 to 4000 and at least one short diol as a chain lengthening agent, the ratio of isocyanate group equivalents to hydroxyl group equivalents is about 1, the proportions of the different polyols are selected such that the number of hydroxyl group equivalents due to the short polyol represents from 20 to 70% of the total hydroxyl groups, and this layer having at a thickness of about 0.5 mm, a flow stress sigma y at -20 degrees C not exceeding 3 daN/mm**2 , a rupture stress sigma R at 40 degrees C of at least 2 daN/mm**2 , a lengthening at rupture vepsiln R at + 20 degrees C from 250 to 500%, and a tear resistance Ra at + 20 degrees C of at least 9 daN/mm.
AU30454/84A 1983-07-11 1984-07-10 Laminated glass Ceased AU572168B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8311506A FR2549036B1 (en) 1983-07-11 1983-07-11 SAFETY SHEET GLAZING
FR8311506 1983-07-11

Publications (2)

Publication Number Publication Date
AU3045484A AU3045484A (en) 1985-01-17
AU572168B2 true AU572168B2 (en) 1988-05-05

Family

ID=9290702

Family Applications (1)

Application Number Title Priority Date Filing Date
AU30454/84A Ceased AU572168B2 (en) 1983-07-11 1984-07-10 Laminated glass

Country Status (23)

Country Link
EP (1) EP0132198B1 (en)
JP (1) JPS6071252A (en)
KR (1) KR920005473B1 (en)
AT (1) ATE31897T1 (en)
AU (1) AU572168B2 (en)
BR (1) BR8403425A (en)
CA (1) CA1253425A (en)
DE (1) DE3468648D1 (en)
DK (1) DK162976C (en)
ES (1) ES8507435A1 (en)
FI (1) FI77601C (en)
FR (1) FR2549036B1 (en)
HU (1) HU194789B (en)
IL (1) IL72359A (en)
IN (1) IN161465B (en)
MA (1) MA20174A1 (en)
MX (1) MX168250B (en)
NO (1) NO161968C (en)
NZ (1) NZ208856A (en)
PT (1) PT78882B (en)
SU (1) SU1517756A3 (en)
YU (1) YU43578B (en)
ZA (1) ZA845290B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9707746B2 (en) 2008-01-19 2017-07-18 Entrotech, Inc. Protected graphics and related methods
US10035932B2 (en) 2007-09-25 2018-07-31 Aero Advanced Paint Technology, Inc. Paint replacement films, composites therefrom, and related methods
US10265932B2 (en) 2005-10-21 2019-04-23 Entrotech, Inc. Protective sheets, articles, and methods
US11827823B2 (en) 2016-09-20 2023-11-28 Ppg Advanced Surface Technologies, Llc Paint film appliques with reduced defects, articles, and methods

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549037B1 (en) * 1983-07-11 1985-10-18 Saint Gobain Vitrage SAFETY SHEET GLAZING
JPH0737122B2 (en) * 1985-06-25 1995-04-26 旭硝子株式会社 Bent safety glass
EP0229326B1 (en) * 1985-12-19 1991-03-13 Ppg Industries, Inc. Aircraft windshield
US4824926A (en) * 1987-12-16 1989-04-25 Ppg Industries, Inc. Bilayer windshield with an abrasion and solvent resistant polyurethane protective coating
FR2646667B1 (en) * 1989-05-03 1991-08-23 Saint Gobain Vitrage GLAZING WITH FILTERING STRIP AND MANUFACTURING METHOD
DE4010485A1 (en) * 1990-03-31 1991-10-02 Ver Glaswerke Gmbh METHOD FOR PRODUCING A PLATE OR FILM FROM POLYCARBONATE WITH A SOFT SCRATCH-PROOF COATING
DE4021113A1 (en) * 1990-07-03 1992-01-09 Bayer Ag Adhesives based on polyols and polyisocyanates
GB9108672D0 (en) * 1991-04-23 1991-06-12 Triplex Aircraft And Special P Lightweight glazings
DE69426906T2 (en) 1993-07-28 2001-08-09 Asahi Glass Co. Ltd., Tokio/Tokyo Process for producing a laminated glass ES
FR2717795B1 (en) * 1994-03-22 1996-05-24 Saint Gobain Vitrage Vehicle glazing and plastic sheet used in this glazing.
FR2720328B1 (en) * 1994-05-27 1996-07-05 Saint Gobain Vitrage Laminated glazing and manufacturing process.
FR2721252B1 (en) 1994-06-17 1996-08-09 Saint Gobain Vitrage Laminated glazing with low energy transmission for transport vehicle.
FR2725399B1 (en) 1994-10-06 1996-11-08 Saint Gobain Vitrage SAFETY GLASS
FR2827855B1 (en) 2001-07-25 2004-07-02 Saint Gobain GLAZING PROVIDED WITH A STACK OF THIN FILMS REFLECTING INFRARED AND / OR SOLAR RADIATION
FR3013043B1 (en) 2013-11-08 2015-11-20 Saint Gobain SUBSTRATE COATED WITH A FUNCTIONAL LAYER STACK HAVING IMPROVED MECHANICAL PROPERTIES
FR3015926B1 (en) 2013-12-31 2017-03-24 Saint Gobain LUMINOUS GLAZING WITH OPTICAL ISOLATOR
FR3015973B1 (en) 2013-12-31 2016-01-01 Saint Gobain LUMINOUS GLAZING WITH OPTICAL ISOLATOR AND ITS MANUFACTURE
FR3017332B1 (en) 2014-02-10 2016-02-19 Saint Gobain LUMINOUS GLAZING WITH OPTICAL ISOLATOR.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2385751A1 (en) * 1977-03-28 1978-10-27 Ppg Industries Inc Polyurethane free from ether linkages - used for glazing or optical lenses, and hard, flexible and resist to weathering
GB1576394A (en) * 1976-07-02 1980-10-08 Saint Gobain Glazing laminates
AU6503880A (en) * 1979-12-06 1981-06-11 Saint-Gobain Vitrage Polyurethane adhesive for laminates

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024113A (en) * 1976-04-28 1977-05-17 Ppg Industries, Inc. Polycarbonate polyurethanes based on particular aliphatic/cycloaliphatic polycarbonates
FR2442128A1 (en) * 1978-11-23 1980-06-20 Saint Gobain PROCESS FOR PRODUCING SHEETS OF PLASTIC MATERIAL
CA1174577A (en) * 1980-04-30 1984-09-18 Vernon G. Ammons Polyurethane composition for safety glass interlayer
FR2496089A1 (en) * 1980-12-11 1982-06-18 Saint Gobain Vitrage SECURITY SHEET GLAZING
JPS57199649A (en) * 1981-06-03 1982-12-07 Asahi Glass Co Ltd Polyurethane sheet and glass-polyurethane laminated sheet
DE3135672A1 (en) * 1981-09-09 1983-03-24 Bayer Ag, 5090 Leverkusen Use of low-viscosity self-curing mixtures for polyurethane interlayers in laminated panes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1576394A (en) * 1976-07-02 1980-10-08 Saint Gobain Glazing laminates
FR2385751A1 (en) * 1977-03-28 1978-10-27 Ppg Industries Inc Polyurethane free from ether linkages - used for glazing or optical lenses, and hard, flexible and resist to weathering
AU6503880A (en) * 1979-12-06 1981-06-11 Saint-Gobain Vitrage Polyurethane adhesive for laminates

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10265932B2 (en) 2005-10-21 2019-04-23 Entrotech, Inc. Protective sheets, articles, and methods
US10035932B2 (en) 2007-09-25 2018-07-31 Aero Advanced Paint Technology, Inc. Paint replacement films, composites therefrom, and related methods
US11420427B2 (en) 2007-09-25 2022-08-23 Entrotech, Inc. Paint replacement film, composites therefrom, and related methods
US9707746B2 (en) 2008-01-19 2017-07-18 Entrotech, Inc. Protected graphics and related methods
US10981371B2 (en) 2008-01-19 2021-04-20 Entrotech, Inc. Protected graphics and related methods
US11577501B2 (en) 2008-01-19 2023-02-14 Entrotech, Inc. Protected graphics and related methods
US12076969B2 (en) 2008-01-19 2024-09-03 Ppg Advanced Surface Technologies, Llc Protected graphics and related methods
US11827823B2 (en) 2016-09-20 2023-11-28 Ppg Advanced Surface Technologies, Llc Paint film appliques with reduced defects, articles, and methods
US11884849B2 (en) 2016-09-20 2024-01-30 Ppg Advanced Surface Technologies, Llc Paint film appliques with reduced defects, articles, and methods

Also Published As

Publication number Publication date
YU120784A (en) 1986-10-31
FR2549036B1 (en) 1985-10-18
DK337084A (en) 1985-01-12
IL72359A0 (en) 1984-11-30
FI77601C (en) 1989-04-10
SU1517756A3 (en) 1989-10-23
NO842805L (en) 1985-01-14
ZA845290B (en) 1986-10-29
MX168250B (en) 1993-05-13
FI842765A (en) 1985-01-12
FI77601B (en) 1988-12-30
NZ208856A (en) 1987-10-30
AU3045484A (en) 1985-01-17
YU43578B (en) 1989-08-31
ES534171A0 (en) 1985-09-01
NO161968C (en) 1989-10-18
KR920005473B1 (en) 1992-07-04
ATE31897T1 (en) 1988-01-15
DK162976C (en) 1992-06-09
PT78882A (en) 1984-08-01
DK162976B (en) 1992-01-06
KR850001514A (en) 1985-03-30
JPS6071252A (en) 1985-04-23
PT78882B (en) 1986-06-05
HUT40384A (en) 1986-12-28
JPH0567418B2 (en) 1993-09-24
EP0132198A1 (en) 1985-01-23
DK337084D0 (en) 1984-07-09
ES8507435A1 (en) 1985-09-01
CA1253425A (en) 1989-05-02
DE3468648D1 (en) 1988-02-18
IN161465B (en) 1987-12-12
MA20174A1 (en) 1985-04-01
FI842765A0 (en) 1984-07-10
HU194789B (en) 1988-03-28
NO161968B (en) 1989-07-10
FR2549036A1 (en) 1985-01-18
EP0132198B1 (en) 1988-01-13
BR8403425A (en) 1985-06-25
IL72359A (en) 1994-01-25

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AU572168B2 (en) Laminated glass
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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired