DE10347163A1 - Composite assembly of at least two glass panes with a film insert and thermoplastic film between them, e.g. for cladding balconies, is bonded together within a flexible bag which can be evacuated and placed within an autoclave - Google Patents

Composite assembly of at least two glass panes with a film insert and thermoplastic film between them, e.g. for cladding balconies, is bonded together within a flexible bag which can be evacuated and placed within an autoclave Download PDF

Info

Publication number
DE10347163A1
DE10347163A1 DE10347163A DE10347163A DE10347163A1 DE 10347163 A1 DE10347163 A1 DE 10347163A1 DE 10347163 A DE10347163 A DE 10347163A DE 10347163 A DE10347163 A DE 10347163A DE 10347163 A1 DE10347163 A1 DE 10347163A1
Authority
DE
Germany
Prior art keywords
film
insert
autoclave
evacuated
flexible bag
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.)
Withdrawn
Application number
DE10347163A
Other languages
German (de)
Inventor
Christoph Doeppner
Rolf A O Schneider
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.)
Schott AG
Original Assignee
Doeppner Bauelemente & Co GmbH
Schneider and Fichtel GmbH
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 Doeppner Bauelemente & Co GmbH, Schneider and Fichtel GmbH filed Critical Doeppner Bauelemente & Co GmbH
Priority to DE10347163A priority Critical patent/DE10347163A1/en
Priority to JP2006515283A priority patent/JP4630277B2/en
Priority to PCT/EP2004/005241 priority patent/WO2004106056A1/en
Priority to ES04733260T priority patent/ES2331072T3/en
Priority to AT04733260T priority patent/ATE439976T1/en
Priority to EP04733260A priority patent/EP1628825B1/en
Priority to EP08018292A priority patent/EP2025510A1/en
Priority to EP08006694A priority patent/EP1952978A1/en
Priority to US10/558,332 priority patent/US20070154705A1/en
Priority to DE502004009924T priority patent/DE502004009924D1/en
Publication of DE10347163A1 publication Critical patent/DE10347163A1/en
Priority to HK06106527.3A priority patent/HK1086530A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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
    • B32B17/10036—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 two outer glass sheets
    • 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
    • B32B17/10036—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 two outer glass sheets
    • B32B17/10045—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 two outer glass sheets with at least one intermediate layer consisting of a 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
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • 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
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
    • 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
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10376—Laminated safety glass or glazing containing metal wires
    • 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
    • B32B17/10761—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 vinyl acetal
    • 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
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
    • B32B17/10825—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts
    • B32B17/10834—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid
    • B32B17/10844—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid
    • B32B17/10853—Isostatic pressing, i.e. using non rigid pressure-exerting members against rigid parts using a fluid using a membrane between the layered product and the fluid the membrane being bag-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/02—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant
    • E04D3/06—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant of glass or other translucent material; Fixing means therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F10/00—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
    • E04F10/005—Rigidly-arranged sunshade roofs with coherent surfaces
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/54—Fixing of glass panes or like plates
    • E06B3/5436—Fixing of glass panes or like plates involving holes or indentations in the pane
    • 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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2121/00—Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2121/008—Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00 for simulation of a starry sky or firmament

Abstract

The technique is for the production of composite assemblies (12) with at least two flat panels (20), where at least one is a glass pane, with at least one film insert (22) between them. At least one transparent thermoplastic film bonds the outer panels to the insert. The components are fitted together and the assembly is placed within a flexible bag (15), which can be evacuated, in an autoclave (14) to create an underpressure which presses the component parts together, together with heat to soften the film layers without forming gas bubbles. The insert is a decorative layer and/or carries an electrical light or heater.
DE10347163A 2003-05-28 2003-10-06 Composite assembly of at least two glass panes with a film insert and thermoplastic film between them, e.g. for cladding balconies, is bonded together within a flexible bag which can be evacuated and placed within an autoclave Withdrawn DE10347163A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DE10347163A DE10347163A1 (en) 2003-10-06 2003-10-06 Composite assembly of at least two glass panes with a film insert and thermoplastic film between them, e.g. for cladding balconies, is bonded together within a flexible bag which can be evacuated and placed within an autoclave
EP04733260A EP1628825B1 (en) 2003-05-28 2004-05-15 Method for producing composite elements
PCT/EP2004/005241 WO2004106056A1 (en) 2003-05-28 2004-05-15 Method and device for producing composite elements, and resulting composite element
ES04733260T ES2331072T3 (en) 2003-05-28 2004-05-15 PROCEDURE FOR THE PRODUCTION OF COMPOSITE ELEMENTS.
AT04733260T ATE439976T1 (en) 2003-05-28 2004-05-15 METHOD FOR PRODUCING COMPOSITE ELEMENTS
JP2006515283A JP4630277B2 (en) 2003-05-28 2004-05-15 Method and apparatus for producing composite, and composite
EP08018292A EP2025510A1 (en) 2003-05-28 2004-05-15 Method for producing compound elements and compound element
EP08006694A EP1952978A1 (en) 2003-05-28 2004-05-15 Method and device for the manufacture of composite elements and composite element
US10/558,332 US20070154705A1 (en) 2003-05-28 2004-05-15 Method and device for producing composite elements and composite element
DE502004009924T DE502004009924D1 (en) 2003-05-28 2004-05-15 METHOD FOR PRODUCING COMPOUND ELEMENTS
HK06106527.3A HK1086530A1 (en) 2003-05-28 2006-06-07 Method for producing composite elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10347163A DE10347163A1 (en) 2003-10-06 2003-10-06 Composite assembly of at least two glass panes with a film insert and thermoplastic film between them, e.g. for cladding balconies, is bonded together within a flexible bag which can be evacuated and placed within an autoclave

Publications (1)

Publication Number Publication Date
DE10347163A1 true DE10347163A1 (en) 2005-04-21

Family

ID=34353368

Family Applications (1)

Application Number Title Priority Date Filing Date
DE10347163A Withdrawn DE10347163A1 (en) 2003-05-28 2003-10-06 Composite assembly of at least two glass panes with a film insert and thermoplastic film between them, e.g. for cladding balconies, is bonded together within a flexible bag which can be evacuated and placed within an autoclave

Country Status (1)

Country Link
DE (1) DE10347163A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036869A1 (en) * 2005-08-02 2007-02-08 Tilmann Krieg Multilayer connected structure for covering interiors or exteriors of buildings has transparent rigid layer with connected light conductive fibers joined to an external light source
WO2007057454A1 (en) * 2005-11-21 2007-05-24 Agc Flat Glass Europe Sa Laminated assembly provided with light-emitting diodes
US20100044006A1 (en) * 2007-02-23 2010-02-25 Universidad Politécnica de Madrid Active transparent or translucent enclosures with energy control capacity
EP2165754A1 (en) * 2008-05-13 2010-03-24 Neuweiler AG Autoclaves for the production of solar glasses and assembly with such autoclaves
US7817327B2 (en) 2006-01-06 2010-10-19 Pilkington Automotive Deutschland Gmbh Vehicle glazing
WO2012031647A1 (en) 2010-09-10 2012-03-15 Bgt Bischoff Glastechnik Ag Laminated glass pane with integrated led matrix and method for producing it
FR3052390A1 (en) * 2016-06-09 2017-12-15 Peugeot Citroen Automobiles Sa LAMINATED GLAZING COMPRISING AT LEAST ONE DECORATIVE AND / OR LUMINOUS ELEMENT INCLUDED IN A LAMINATE INTERIOR
EP1954526B1 (en) * 2005-11-21 2021-01-27 AGC Glass Europe Light emitting panel

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036869A1 (en) * 2005-08-02 2007-02-08 Tilmann Krieg Multilayer connected structure for covering interiors or exteriors of buildings has transparent rigid layer with connected light conductive fibers joined to an external light source
WO2007057454A1 (en) * 2005-11-21 2007-05-24 Agc Flat Glass Europe Sa Laminated assembly provided with light-emitting diodes
EP1954526B1 (en) * 2005-11-21 2021-01-27 AGC Glass Europe Light emitting panel
US7817327B2 (en) 2006-01-06 2010-10-19 Pilkington Automotive Deutschland Gmbh Vehicle glazing
US20100044006A1 (en) * 2007-02-23 2010-02-25 Universidad Politécnica de Madrid Active transparent or translucent enclosures with energy control capacity
US8341894B2 (en) * 2007-02-23 2013-01-01 Universidad Politecnica De Madrid Active transparent or translucent enclosures with energy control capacity
EP2165754A1 (en) * 2008-05-13 2010-03-24 Neuweiler AG Autoclaves for the production of solar glasses and assembly with such autoclaves
WO2012031647A1 (en) 2010-09-10 2012-03-15 Bgt Bischoff Glastechnik Ag Laminated glass pane with integrated led matrix and method for producing it
EP2441576A1 (en) * 2010-09-10 2012-04-18 BGT Bischoff Glastechnik AG Laminated glass panel with integrated LED matrix and method for producing same
FR3052390A1 (en) * 2016-06-09 2017-12-15 Peugeot Citroen Automobiles Sa LAMINATED GLAZING COMPRISING AT LEAST ONE DECORATIVE AND / OR LUMINOUS ELEMENT INCLUDED IN A LAMINATE INTERIOR

Similar Documents

Publication Publication Date Title
HK1086530A1 (en) Method for producing composite elements
CA2908998C (en) Methods of forming laminated glass structures
ATE397787T1 (en) SOLAR MODULE AS COMPOSITE SAFETY GLASS
AU696327B2 (en) Method for producing a laminated glass pane free of optical obstruction caused by warping, use of a particular carrier film for the production of the laminated glass pane and carrier films particularly suitable for the method or the use
DE10347163A1 (en) Composite assembly of at least two glass panes with a film insert and thermoplastic film between them, e.g. for cladding balconies, is bonded together within a flexible bag which can be evacuated and placed within an autoclave
SE8503769L (en) LAMINATED STRUCTURE
TWI734906B (en) Glass resin laminate
CN108621504B (en) Safe energy-saving automobile glass and manufacturing method thereof
TW200502095A (en) Manufacture of thermal laminate and apparatus therefor
JP2005529766A (en) Composite pane with film laminate
ITTO20010823A1 (en) PROCESS FOR THE CONSTRUCTION OF A STONE-GLASS COMPOSITE PANEL AND PANEL OBTAINED WITH SUCH PROCESS.
CN108621752B (en) Safe energy-saving automobile glass and manufacturing method thereof
GB2176438A (en) Method and apparatus for applying anti-lacerative plastic layer to glass
KR20160124395A (en) Polycarbonate-glass laminated sheet and method for manufacturing of the same
CN202826595U (en) Interlayer safe decorative glass
CN218876525U (en) Furniture decorative plate
CN217435193U (en) Laminated glass for decoration
FI940426A (en) Production of glass / plastic laminates with improved optical quality
KR100806514B1 (en) Method for adhering soft matter to glass
JPS6422543A (en) Method for forming multi-layer laminate
JP2004504211A (en) Window glass
ATE243111T1 (en) COMPOSITE GLASS SLIDERS FOR SUN PROTECTION, MECHANICAL PROTECTION, AND FIRE PROTECTION.
KR20200128423A (en) Composite pane with functional elements and lighting
JPH08281876A (en) Decorative panel
JP2018087097A (en) Production method of laminate body

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: SCHOTT AG, 55122 MAINZ, DE

R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20110502