EP0000873B1 - Sound barrier material - Google Patents

Sound barrier material Download PDF

Info

Publication number
EP0000873B1
EP0000873B1 EP19780100527 EP78100527A EP0000873B1 EP 0000873 B1 EP0000873 B1 EP 0000873B1 EP 19780100527 EP19780100527 EP 19780100527 EP 78100527 A EP78100527 A EP 78100527A EP 0000873 B1 EP0000873 B1 EP 0000873B1
Authority
EP
European Patent Office
Prior art keywords
barrier material
sound
sound barrier
foam
sheet
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
EP19780100527
Other languages
German (de)
French (fr)
Other versions
EP0000873A1 (en
Inventor
Paul Edward Oliveira
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.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
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 Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of EP0000873A1 publication Critical patent/EP0000873A1/en
Application granted granted Critical
Publication of EP0000873B1 publication Critical patent/EP0000873B1/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
    • 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
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/8409—Sound-absorbing elements sheet-shaped
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—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
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24058—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in respective layers or components in angular relation
    • Y10T428/24074—Strand or strand-portions
    • Y10T428/24091—Strand or strand-portions with additional layer[s]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249987—With nonvoid component of specified composition
    • Y10T428/249991—Synthetic resin or natural rubbers
    • Y10T428/249992—Linear or thermoplastic
    • 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.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/647—Including a foamed layer or component
    • Y10T442/652—Nonwoven fabric is coated, impregnated, or autogenously bonded

Description

    Technical Field
  • This invention relates to a relatively dimensionally stable, sound-absorbent and transmission loss sheet or barrier, comprising a sound-absorbing sheet laminated to a foam base.
    • Background Art
  • Certain equipment including piping has high noise transmission levels and consequently work areas equipped with such equipment can have noise levels that are harmful to occupants of said area. It has been desirable and customary to provide such areas with lightweight, flexible sound-absorbent or transmission loss sheets or barriers to lower the noise level. Such barriers having a sound-absorbing sheet laminated to a foam base are illustrated for example in GB 951 805 and in FR 2 273 336. The object of this invention is to provide an improved sound-absorbent and transmission loss barrier or sheet capable of effectively reducing the noise level in a work area.
    • Disclosure and Practice of the Invention
  • The invention is characterized in that the sound-absorbing sheet is constituted by a polyvinyl chloride impregnated mesh sheet which has a coating on both sides of about 0.05 to 8.1 centimeters gauge of barium sulfate loaded chlorinated polyethylene and in that the foam has a weight of 24 to 40 kilograms per cubic meter.
  • The noise abatement materials of this invention can be of any shape but preferably is supplied as a flexible sheet which can be readily cut and draped around the noise producing apparatus or machinery to forestall noise transmission into or through a work area. Usually the sheet is of 0.127 centimeters or 7.62 centimeters gauge that can be hung, draped wrapped or folded to enclose the noisy machinery or pipes and can be adhered together with suitable adhesives or can be sewn together or connected with fasteners to maintain the sound barrier in the desired relationship and position relative to the noise producer.
  • The specific nature of this invention and its advantages can be more readily appreciated by reference to the following representative and exemplary examples wherein all parts and percentages are by weight unless otherwise designated.
    • Example 1
  • A nonflammable mesh material of 33.75 to 540 grams per square meter was coated with a plasticized vinyl chloride resin to give a mesh base sheet having preferably a width of about 30.48 centimeters or more. This mesh base sheet was passed through calender rolls to apply a predetermined amount of rubbery coating composition to each side having the composition like that of the recipe of Table I. The specific gravity of the compound is in the range of 1.50 to 2.25. The recipe is as set forth below in Table I.
    Figure imgb0001
  • The above ingredients were mixed on a conventional rubber or plastic mixer to give a mixture of uniform texture that can be applied on the calender to the mesh sheet. A sheet of polyurethane foam of about 24 to 40 and preferably 25.6 to 32.5 kilograms per cubic meter was cut from a polyurethane bun having the desired density to provide a sheet of the desired thickness, usually 0.6 to 3.8 centimeters thick.
  • The nonflammable mesh base sheet having a coating of the rubbery composition of the recipe, of predetermined gauge, preferably .05 to 8.1 centimeters on each face therof, is laminated to the polyurethane sheet by placing the two sheets in contact at elevated temperature and pressure in a plate-press, press rolls or related pressure-temperature means.
  • A laminate made as described comprising a polyvinyl chloride impregnated nonflammable mesh sheet having predetermined gauge coating of the composition of the recipe of Table I laminated to. a 1.3 centimeter polyurethane foam sheet, had a sound transmission class number of 28 and a noise reduction coefficient of 0.30 as measured by ASTM E90-75 and E413-73 for transmission loss and ASTM C432-66 for sound absorption.
  • Preferably the mesh base sheet of the barrier is nonflammable and in these cases glass fiber mesh sheets are preferred over other fabric materials.
  • Since chlorinated polyethylene and polyvinyl chloride can degrade by generation of HCI it is desirable that they be stabilized with suitable stabilizers such as a litharge dispersion in EPD rubber or the compounds viz., tin and barium compounds used to stabilize polyvinyl chloride.
  • Any of the plasticizers for polyvinyl chloride can be used in this invention but chlorinated paraffin wax, 10 to 35 percent chloride, can be used, too.
  • While certain representative embodiments and details have been shown for the purpose of illustrating the invention it will be apparent to those skilled in this art that various changes and modifications may be made therein without departing from the scope of the invention.

Claims (4)

1. A sound barrier material comprising a sound absorbing sheet laminated to a foam base characterized in that the sound absorbing sheet is constituted by a polyvinyl chloride impregnated mesh sheet which has a coating on both sides of about 0.05 to 8.1 centimeters gauge of a barium sulfate loaded chlorinated polyethylene and in that the foam has a weight of 24 to 40 kilograms per cubic meter.
2. The sound barrier material of Claim 1 characterized in that 50 to 200 parts of barium sulfate are present in each 100 parts of chlorinated polyethylene coating and in that the coating contains from 36 to 48 weight percent of chlorine.
3. The sound barrier material of Claim 1 characterized in that the sound absorbing sheet is stabilized with litharge and that the plasticizer contains chlorinated paraffin wax.
4. The sound barrier material of Claim 1 characterized in that the foam is a polyurethane foam.
EP19780100527 1977-08-23 1978-07-27 Sound barrier material Expired EP0000873B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/827,036 US4110510A (en) 1977-08-23 1977-08-23 Sound barrier material
US827036 1986-02-07

Publications (2)

Publication Number Publication Date
EP0000873A1 EP0000873A1 (en) 1979-03-07
EP0000873B1 true EP0000873B1 (en) 1981-10-21

Family

ID=25248165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19780100527 Expired EP0000873B1 (en) 1977-08-23 1978-07-27 Sound barrier material

Country Status (4)

Country Link
US (1) US4110510A (en)
EP (1) EP0000873B1 (en)
CA (1) CA1109780A (en)
DE (1) DE2861193D1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248325A (en) * 1978-12-28 1981-02-03 Westinghouse Electric Corp. Tackable sound absorptive panel
DE3070781D1 (en) * 1979-10-22 1985-07-25 Du Pont An acoustical-damping fibrous or cellular material, a process for its preparation and a latex composition useful for its preparation
US4303723A (en) * 1980-02-04 1981-12-01 The Goodyear Tire & Rubber Company Sound barrier material
US4340129A (en) * 1980-05-01 1982-07-20 Cabot Corporation Acoustical laminate construction and attenuated systems comprising same
US4367259A (en) * 1981-07-27 1983-01-04 W. R. Grace & Co. Sound deadening material
US4488619A (en) * 1984-04-11 1984-12-18 Neill Justin T O Foam-barrier-foam-facing acoustical composite
US4940112A (en) * 1989-06-20 1990-07-10 Neill Justin T O High performance flame and smoke foam-barrier-foam-facing acoustical composite
WO1995009082A1 (en) * 1993-09-28 1995-04-06 Bradford Industries, Inc. Sound attenuation composite and method for forming same
US6077613A (en) * 1993-11-12 2000-06-20 The Noble Company Sound insulating membrane
US5683773A (en) * 1995-01-20 1997-11-04 The Gates Corporation Chlorine-containing polyethylene-and polyether-based elastomers stabilized with barium sulfate
JP3787893B2 (en) * 1996-05-16 2006-06-21 キョーワ株式会社 Flameproof mesh sheet
US6122877A (en) 1997-05-30 2000-09-26 Andersen Corporation Fiber-polymeric composite siding unit and method of manufacture
DE502005005755D1 (en) * 2005-04-28 2008-12-04 Lufthansa Technik Ag Sound insulating material for insulation in aircraft

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253947A (en) * 1961-03-03 1966-05-31 Porter Co Inc H K Flexible sound attenuating material
GB951805A (en) * 1961-04-19 1964-03-11 Sound Control Ltd Means for sound-proofing an object emitting a noisy stream of gaseous medium
BE616787A (en) * 1961-04-25 1900-01-01
US3546059A (en) * 1964-05-04 1970-12-08 Grace W R & Co Composite fibrous article bonded with novel copolymer compositions and method of making same
US3575779A (en) * 1965-04-06 1971-04-20 Allied Chem Membranes and laminates of chlorinated linear polyethylene
US3360422A (en) * 1965-10-19 1967-12-26 Armstrong Cork Co Reinforced cellular floor covering
US3769072A (en) * 1967-03-24 1973-10-30 Porter Co H Pipe lagging material and process for making same
US3489242A (en) * 1969-04-01 1970-01-13 Du Pont Acoustical panel comprising viscoelastic material with heavy filler particles
DE1928662C3 (en) * 1969-06-06 1978-06-15 Dynamit Nobel Ag, 5210 Troisdorf Device for HF welding of PVC foam with mesh-like perforated materials
BE736026A (en) * 1969-07-11 1969-12-16
US3895983A (en) * 1970-04-17 1975-07-22 Foster Grant Co Inc Process of fabricating a plastic net laminate material
US3778337A (en) * 1971-07-22 1973-12-11 California Weavers Inc Decorative wall covering
US3733239A (en) * 1971-11-19 1973-05-15 Armstrong Cork Co Glass-organic fiber scrim for flooring
DE2426793B2 (en) * 1974-06-01 1978-11-16 Dynamit Nobel Ag, 5210 Troisdorf Covering with a sound-absorbing effect
US4056161A (en) * 1975-10-30 1977-11-01 Tillotson Corporation Sound attenuation material
US4038447A (en) * 1976-02-05 1977-07-26 Brock Wayne C Flame resistant insulation blanket

Also Published As

Publication number Publication date
CA1109780A (en) 1981-09-29
EP0000873A1 (en) 1979-03-07
DE2861193D1 (en) 1981-12-24
US4110510A (en) 1978-08-29

Similar Documents

Publication Publication Date Title
EP0000873B1 (en) Sound barrier material
US2999041A (en) Reinforced tear-resistant material
US3919444A (en) Acoustical fire-retardant wall and ceiling tile
EP0067418A2 (en) A polyvinyl chloride resinous composition and product thereof
GB2050382A (en) Wall covering material
US4237178A (en) Sound proof materials for buildings
JPH0665620B2 (en) Vibration control sheet for vehicles
JPS6325032A (en) Laminate for heat-insulating structure and manufacture thereof
CA1153952A (en) Sound barrier material
US3564085A (en) Method for making heat sealable foams
JP3949797B2 (en) Foam laminated sheet
KR101706084B1 (en) Flooring for interior
ES422481A1 (en) Fire-resistant composite product
US20080203350A1 (en) Composition For Producing Sheet Material
HK96592A (en) Multilayered polymeric structures containing a layer of polyvinylidene fluoride bonded to a layer of plastified polyvinyl chloride,and use of these structures in making a flexible packaging material
JP3227831B2 (en) Compositions for floor, ceiling and wall facings
US3639160A (en) Method of making a cellular structure having a decorative textured surface
JP2000352184A (en) Floor material
JPS6121240Y2 (en)
GB2085899A (en) Flame retardant composition
JP2698164B2 (en) Tatami floor core and tatami floor
DE2254339A1 (en) FIRE-RESISTANT PLASTIC OR RUBBER FILM
KR200330114Y1 (en) Soundproof wood insulator with Single or Double G/F Structure
CH642302A5 (en) Multi-layer polyvinyl chloride-based material
JP3162903B2 (en) Laminate

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

17P Request for examination filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 2861193

Country of ref document: DE

Date of ref document: 19811224

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840619

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840813

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890727

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19900330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19900403

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT