HK1144921A1 - Device for producing multilayer, coextruded, tubular preforms made of thermoplastic material - Google Patents

Device for producing multilayer, coextruded, tubular preforms made of thermoplastic material

Info

Publication number
HK1144921A1
HK1144921A1 HK10111309.1A HK10111309A HK1144921A1 HK 1144921 A1 HK1144921 A1 HK 1144921A1 HK 10111309 A HK10111309 A HK 10111309A HK 1144921 A1 HK1144921 A1 HK 1144921A1
Authority
HK
Hong Kong
Prior art keywords
annular
melt
flow channel
inlets
conical surface
Prior art date
Application number
HK10111309.1A
Other languages
English (en)
Inventor
Guenter Richter
Original Assignee
Guenter Richter
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 Guenter Richter filed Critical Guenter Richter
Publication of HK1144921A1 publication Critical patent/HK1144921A1/xx

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/266—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/266—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated
    • B29C48/2665—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated allowing small relative movement, e.g. adjustments for aligning the apparatus parts or for compensating for thermal expansion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
    • B29C48/3366—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die using a die with concentric parts, e.g. rings, cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • B29C49/041—Extrusion blow-moulding using an accumulator head

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
HK10111309.1A 2004-03-30 2010-12-06 Device for producing multilayer, coextruded, tubular preforms made of thermoplastic material HK1144921A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004015551A DE102004015551A1 (de) 2004-03-30 2004-03-30 Vorrichtung zur Herstellung schlauchartiger Vorformlinge mit asymmetrischem Ringkolben

Publications (1)

Publication Number Publication Date
HK1144921A1 true HK1144921A1 (en) 2011-03-18

Family

ID=34963498

Family Applications (2)

Application Number Title Priority Date Filing Date
HK10111309.1A HK1144921A1 (en) 2004-03-30 2010-12-06 Device for producing multilayer, coextruded, tubular preforms made of thermoplastic material
HK10111310.8A HK1144922A1 (en) 2004-03-30 2010-12-06 Device for producing multilayer, coextruded, tubular preforms made of thermoplastic material

Family Applications After (1)

Application Number Title Priority Date Filing Date
HK10111310.8A HK1144922A1 (en) 2004-03-30 2010-12-06 Device for producing multilayer, coextruded, tubular preforms made of thermoplastic material

Country Status (12)

Country Link
US (1) US7883329B2 (fr)
EP (3) EP1870221B1 (fr)
JP (1) JP5032302B2 (fr)
KR (1) KR101164260B1 (fr)
CN (3) CN101791845B (fr)
AT (3) ATE369969T1 (fr)
AU (1) AU2005231575B2 (fr)
DE (3) DE102004015551A1 (fr)
ES (1) ES2290895T3 (fr)
HK (2) HK1144921A1 (fr)
PL (1) PL1740362T3 (fr)
WO (1) WO2005097462A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004015551A1 (de) * 2004-03-30 2005-10-20 Guenter Richter Vorrichtung zur Herstellung schlauchartiger Vorformlinge mit asymmetrischem Ringkolben
US20100072655A1 (en) * 2008-09-23 2010-03-25 Cryovac, Inc. Die, system, and method for coextruding a plurality of fluid layers
DE102009033327A1 (de) 2009-07-15 2011-01-20 Richter, Günter Vorrichtung und Verfahren zur Herstellung von Vorformlingen
DE102010004586A1 (de) 2010-01-14 2011-07-21 Richter, Bodo, 57610 Vorrichtung und Verfahren zum Herstellen großvolumiger Hohlkörper aus Kunststoff, umfassend eine Vakuumkammer
DE202010000953U1 (de) 2010-01-14 2011-05-19 Richter, Bodo, 57610 Vorrichtung zum Herstellen großvolumiger Hohlkörper aus Kunststoff, umfassend eine Vakuumkammer
TW201130636A (en) 2010-01-14 2011-09-16 Richter Bodo Device and method for producing large-volume hollow bodies made of synthetic material, comprising a vacuum chamber
CN103244113A (zh) * 2013-05-08 2013-08-14 常州大学 空心岩心模型制造装置
CN103935006B (zh) * 2014-03-10 2016-01-20 苏州金纬机械制造有限公司 一种实壁管制管模具
CN110843190B (zh) * 2019-12-09 2021-11-05 苏州同大机械有限公司 吹塑机的三层导流储料式模头装置
DE202021104605U1 (de) 2021-07-20 2021-09-28 Bodo Richter Vorrichtung für die biaxiale Kunststoff-Extrusion
DE102021118705A1 (de) 2021-07-20 2023-01-26 Bodo Richter Vorrichtung und Verfahren für die biaxiale Kunststoff-Extrusion
DE102022104059B3 (de) 2022-02-21 2023-07-13 BBM Maschinenbau und Vertriebs GmbH Coextrusionswerkzeug zur Herstellung mehrschichtiger, schlauchartiger Vorformlinge aus thermoplastischem Kunststoff

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Publication number Priority date Publication date Assignee Title
US3692447A (en) * 1970-11-30 1972-09-19 Crompton & Knowles Corp Multiple extrusion apparatus
JPS6058011B2 (ja) * 1975-08-12 1985-12-18 凸版印刷株式会社 ブロ−成形用多層パリソン成形装置
DE2712910A1 (de) * 1977-03-24 1978-09-28 Mauser Kg Schlauchkopf
GB1591317A (en) 1977-08-05 1981-06-17 Kobe Steel Ltd Steelpipe cooking process and apparatus
DE2740579A1 (de) * 1977-09-09 1979-03-22 Mauser Kg Schlauchkopf zum herstellen eines hohlstranges aus thermoplastischem kunststoff
US4297092A (en) * 1980-06-30 1981-10-27 Midland-Ross Corporation Accumulator head used in the formation of a multi-layer parison
FR2503627A1 (fr) * 1981-04-09 1982-10-15 Raffinage Cie Francaise Tete pour l'extrusion d'une paraison tubulaire a au moins une couche de matiere
US4712993A (en) * 1986-03-25 1987-12-15 Lupke Manfred Arno Alfred Extrusion die for externally ribbed plastic tubing
DE3620144A1 (de) * 1986-06-14 1987-12-17 Bekum Maschf Gmbh Speicherkopf fuer die herstellung mehrschichtiger co-extrudierter schlaeuche aus kunststoff
DE3635334C3 (de) * 1986-10-17 1997-04-03 Guenter Richter Vorrichtung zur diskontinuierlichen Herstellung mehrschichtiger, coextrudierter, schlauchartiger Vorformlinge aus thermoplastischem Kunststoff für das Blasformen
US4874305A (en) * 1988-11-03 1989-10-17 Somerset Technologies, Inc. Accumulator extrusion head for producing striped parisons
DE3902270A1 (de) * 1989-01-26 1990-08-02 Guenter Dipl Ing Richter Verfahren und vorrichtung zur diskontinuierlichen herstellung mehrschichtiger, coextrudierter, schlauchartiger vorformlinge aus thermoplastischem kunststoff
DE9107812U1 (de) * 1991-06-25 1991-10-24 Richter, Günter, Dipl.-Ing., 5230 Altenkirchen Vorrichtung zur diskontinuierlichen Herstellung eines Vorformlings für das Blasformen
DE4129017A1 (de) * 1991-08-31 1993-03-04 Kautex Maschinenbau Gmbh Vorrichtung zum verarbeiten von thermoplastichem kunststoff mit einer plastifiziereinheit
US5262119A (en) * 1992-04-27 1993-11-16 Owens-Illinois Plastics Products Inc. Plastic system for injection molding and extruding a hollow tube for forming a plastic container by blowing
JP2773810B2 (ja) * 1992-11-20 1998-07-09 宇部興産株式会社 ブロー成形用ダイス
DE4322023C1 (de) * 1993-07-02 1994-02-24 Gkn Automotive Ag Verteilerkopf
DE19545441B4 (de) * 1995-12-06 2005-06-02 Richter, Günter Vorrichtung zur Herstellung eines schlauchartigen Vorformlings sowie aus dem Vorformling hergestelltes Formteil
JP2700785B2 (ja) * 1996-02-08 1998-01-21 株式会社プラコー ダイ内アキュームレータ式ブロー成形機におけるブロー成形用ダイヘッド
DE19635334A1 (de) * 1996-08-31 1998-03-05 Guenter Dipl Ing Richter Faßartiger Behälter aus Kunststoff sowie Verfahren und Vorrichtung zu seiner Herstellung
DE102004015551A1 (de) * 2004-03-30 2005-10-20 Guenter Richter Vorrichtung zur Herstellung schlauchartiger Vorformlinge mit asymmetrischem Ringkolben

Also Published As

Publication number Publication date
EP1870221B1 (fr) 2011-09-21
KR101164260B1 (ko) 2012-07-09
JP5032302B2 (ja) 2012-09-26
AU2005231575A1 (en) 2005-10-20
US7883329B2 (en) 2011-02-08
EP1740362B1 (fr) 2007-08-15
CN101791846B (zh) 2014-09-10
CN101791846A (zh) 2010-08-04
DE502005001259D1 (de) 2007-09-27
PL1740362T3 (pl) 2008-01-31
ES2290895T3 (es) 2008-02-16
HK1144922A1 (en) 2011-03-18
ATE456992T1 (de) 2010-02-15
AU2005231575B2 (en) 2011-02-24
DE502005008982D1 (de) 2010-03-25
KR20060129044A (ko) 2006-12-14
EP1880823A1 (fr) 2008-01-23
ATE525192T1 (de) 2011-10-15
CN101791845A (zh) 2010-08-04
DE102004015551A1 (de) 2005-10-20
EP1880823B1 (fr) 2010-02-03
US20070202209A1 (en) 2007-08-30
JP2007537056A (ja) 2007-12-20
CN100581784C (zh) 2010-01-20
CN1938143A (zh) 2007-03-28
EP1870221A1 (fr) 2007-12-26
WO2005097462A1 (fr) 2005-10-20
CN101791845B (zh) 2013-10-23
ATE369969T1 (de) 2007-09-15
EP1740362A1 (fr) 2007-01-10

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20220313