ATE271983T1 - Mehrschichtkraftstoffbehälter - Google Patents

Mehrschichtkraftstoffbehälter

Info

Publication number
ATE271983T1
ATE271983T1 AT00102550T AT00102550T ATE271983T1 AT E271983 T1 ATE271983 T1 AT E271983T1 AT 00102550 T AT00102550 T AT 00102550T AT 00102550 T AT00102550 T AT 00102550T AT E271983 T1 ATE271983 T1 AT E271983T1
Authority
AT
Austria
Prior art keywords
layer
fuel tank
layer fuel
evoh
polyamide
Prior art date
Application number
AT00102550T
Other languages
English (en)
Inventor
Pierre Delbarre
Original Assignee
Ti Automotive Technology Ct Gm
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 Ti Automotive Technology Ct Gm filed Critical Ti Automotive Technology Ct Gm
Application granted granted Critical
Publication of ATE271983T1 publication Critical patent/ATE271983T1/de

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/06—Polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/03177—Fuel tanks made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C09J123/0815—Copolymers of ethene with aliphatic 1-olefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03032—Manufacturing of fuel tanks
    • B60K2015/03046—Manufacturing of fuel tanks made from more than one layer
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms
    • C08L23/0815—Copolymers of ethene with unsaturated hydrocarbons only containing four or more carbon atoms with aliphatic 1-olefins containing one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2314/00—Polymer mixtures characterised by way of preparation
    • C08L2314/06—Metallocene or single site catalysts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C08L2666/04—Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
    • C08L2666/06—Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C08L2666/24—Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
AT00102550T 2000-02-07 2000-02-07 Mehrschichtkraftstoffbehälter ATE271983T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00102550A EP1122113B1 (de) 2000-02-07 2000-02-07 Mehrschichtkraftstoffbehälter

Publications (1)

Publication Number Publication Date
ATE271983T1 true ATE271983T1 (de) 2004-08-15

Family

ID=8167793

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00102550T ATE271983T1 (de) 2000-02-07 2000-02-07 Mehrschichtkraftstoffbehälter

Country Status (5)

Country Link
US (1) US20020051856A1 (de)
EP (1) EP1122113B1 (de)
AT (1) ATE271983T1 (de)
DE (1) DE60012470T2 (de)
ES (1) ES2224930T3 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6915812B2 (en) 2000-09-12 2005-07-12 Alfmeier Corporation Low permeation weldable fuel tank assembly
US6884482B2 (en) 2001-03-27 2005-04-26 Kuraray Co., Ltd. Fuel container having excellent gasoline barrier properties
FR2831172A1 (fr) * 2001-10-19 2003-04-25 Inergy Automotive Systems Man Corps creux impermeable en materiau thermoplastique et procede pour sa fabrication
US7211307B2 (en) 2002-07-11 2007-05-01 Visteon Global Techologies, Inc. Low permeation polymer fuel tank
FR2852319B1 (fr) * 2003-03-14 2007-07-06 Procede pour la recuperation d'un polymere d'alcool vinylique en solution
EP1548059B1 (de) 2003-12-26 2006-12-13 Mitsubishi Gas Chemical Company, Inc. Brennstoffundurchlässige thermoplastische Harzzusammensetzung und geformter Artikel
US7493894B2 (en) * 2004-02-13 2009-02-24 Kelch Corporation Tank assembly and components
US8381928B2 (en) * 2004-06-04 2013-02-26 Ti Group Automotive Systems, L.L.C. Multilayer fuel tank with a seam having an overlay for reducing vapor permeation
US7089917B1 (en) 2004-06-16 2006-08-15 Polaris Industries Inc. Snowmobile fuel system sump tank
US20060016813A1 (en) * 2004-07-23 2006-01-26 Fenton Ronald L Safety improvement for a fuel tank
FR2879121B1 (fr) * 2004-12-15 2008-09-26 Inergy Automotive Systems Res Procede pour la connexion d'une piece tubulaire en matiere plastique a une goulotte d'un reservoir a carburant egalement en matiere plastique
US20070261752A1 (en) * 2006-04-13 2007-11-15 Stant Manufacturing Inc. Multiple-layer fluid fuel apparatus
ATE498649T1 (de) * 2007-03-21 2011-03-15 Reinhard Feichtinger Kraftstofftankanbauteil und verfahren zur herstellung eines kraftstofftankanbauteils
FR2915484B1 (fr) * 2007-04-27 2012-10-12 Rhodia Operations Materiau polyamide a proprietes barrieres aux fluides elevees.
DE102009013514A1 (de) 2009-03-19 2010-09-30 Kautex Textron Gmbh & Co. Kg Kunststoff-Kraftstoffbehälter
US8617675B2 (en) * 2009-12-15 2013-12-31 Reinhard Feichtinger Fuel tank attachment and method for producing a fuel tank attachment
US8721956B2 (en) * 2010-03-03 2014-05-13 Ti Automotive Technology Center Gmbh Method of forming a fluid receptacle
FR2966394B1 (fr) * 2010-10-22 2013-06-28 Inergy Automotive Systems Res Reservoir pour vehicule et/ou tubulure de remplissage pour un tel reservoir
DE102017119708A1 (de) * 2017-08-28 2019-02-28 Kautex Textron Gmbh & Co. Kg Flüssigkeitsbehälter für ein Kraftfahrzeug und Verfahren zum Herstellen eines Flüssigkeitsbehälters
EP3459709A1 (de) 2017-09-26 2019-03-27 Magna Steyr Fuel Systems GesmbH Kunststofftank
KR102817462B1 (ko) * 2019-10-22 2025-06-05 현대자동차주식회사 폴리아세탈 수지 조성물 및 이를 이용하여 제조된 내산성이 우수한 차량 연료펌프모듈
CN115537148B (zh) * 2022-10-31 2023-08-22 金发科技股份有限公司 一种聚乙烯组合物及其制备方法和应用

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0751343B2 (ja) * 1988-10-17 1995-06-05 日本石油化学株式会社 中空容器
GB9021090D0 (en) * 1990-09-27 1990-11-07 Bp Chem Int Ltd Adhesive and its uses
JP2741650B2 (ja) * 1992-08-31 1998-04-22 三菱化学株式会社 多層プラスチック燃料タンク
GB9317631D0 (en) * 1993-08-25 1993-10-13 Bxl Plastics Ltd Multi-layered composite
DE69618272T2 (de) * 1995-05-09 2002-08-14 Atofina, Puteaux Koextrusionsbindemittel aus gepfropften Polyolefinen
US6545091B1 (en) * 1996-01-25 2003-04-08 E. I. Du Pont De Nemours & Co. Adhesive compositions based on blends of grafted metallocene catalyzed and non-grafted conventional polyethylenes

Also Published As

Publication number Publication date
DE60012470T2 (de) 2005-09-15
EP1122113B1 (de) 2004-07-28
EP1122113A1 (de) 2001-08-08
US20020051856A1 (en) 2002-05-02
DE60012470D1 (de) 2004-09-02
ES2224930T3 (es) 2005-03-16

Similar Documents

Publication Publication Date Title
DE60012470D1 (de) Mehrschichtkraftstoffbehälter
KR960034833A (ko) 전기 전도성 내부층을 갖는 다층 파이프
ATE324259T1 (de) Orientierte mehrschichtige polyolefinfolien
ATE422416T1 (de) Kraftstoffbehälter
KR960040753A (ko) 연료 탱크
BR0200985A (pt) Recipiente para combustìvel possuindo excelentes propriedades de barreira a gasolina
ATE407974T1 (de) Mehrschichtverpackung mit barriereeigenschaften
KR970033022A (ko) 산소흡수 다층막 및 그 제법
US20010045433A1 (en) Permeation barrier fuel tank
ES2188594T3 (es) Envase barrera al oxigeno.
BR9713804A (pt) Estruturas laminadas para recipientes de combustìvel, métodos para produzì-los e recipiente produzido
ATE269816T1 (de) Durchsichtiger mehrschichtbehälter mit sperrschutz
ATE227643T1 (de) Kunststoffbasierte mehrschichtstruktur und mehrschichtiges rohr
ATE194798T1 (de) Rohr
KR20020079467A (ko) 탄화수소를 포함하는 유체용 다층 파이프
DE50303122D1 (de) Mehrschichtiges Rohr aus thermoplastischem Kunststoff
ATE369246T1 (de) Heissschrumpffähige, gassperrende, thermoplastische mehrschichtfolie und daraus hergestellte behälter
DE60104710D1 (de) Mikrowellenbeständiger behälter mit langer lebensdauer
KR100351999B1 (ko) 저연료 투과성을 갖는 플라스틱 연료탱크 및 제조방법
ATE394221T1 (de) Mehrschichtmaterialien und daraus hergestellte behälter
KR940007412A (ko) 연료 이송용 튜브
ATE454265T1 (de) Auf polypropylen basierender mehrschichtfilm mit sperreigenschaften
MY120170A (en) A tube of layered material
TH34848A (th) ท่อที่ทำด้วยวัสดุที่เป็นชั้น
KR950012847A (ko) 반도체 레이저 다이오드

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties