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IL102958A0 - Tube conduit connection and method of producing the same from polyolefins - Google Patents

Tube conduit connection and method of producing the same from polyolefins

Info

Publication number
IL102958A0
IL102958A0 IL102958A IL10295892A IL102958A0 IL 102958 A0 IL102958 A0 IL 102958A0 IL 102958 A IL102958 A IL 102958A IL 10295892 A IL10295892 A IL 10295892A IL 102958 A0 IL102958 A0 IL 102958A0
Authority
IL
Israel
Prior art keywords
pipe end
polyolefins
pipe
producing
same
Prior art date
Application number
IL102958A
Other versions
IL102958A (en
Original Assignee
Wirsbo Rohrprod Und Vertr 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8207102&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=IL102958(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wirsbo Rohrprod Und Vertr Gmbh filed Critical Wirsbo Rohrprod Und Vertr Gmbh
Publication of IL102958A0 publication Critical patent/IL102958A0/en
Publication of IL102958A publication Critical patent/IL102958A/en

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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52297—Joining tubular articles involving the use of a socket said socket comprising slip-off prevention means
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
    • F16L47/22—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics using shrink-down material
    • 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
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73715—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Details Of Indoor Wiring (AREA)

Abstract

A pipe end (13) of a pipe (12) consisting of polyolefin is deformed cold, that is to say at ambient temperature, with the aid of an expanding mandrel. Once the expanding mandrel has been withdrawn, the expanded pipe end (13) and a respectively desired connecting part, or the pipe end (11) of a further pipe (10), are plugged onto one another. The pipe end (13) consisting of polyolefin experiences only a reversible deformation and, as a result of it deforming back to its original shape, forms a firm, gas-tight connection to the connecting part or to the other pipe end (11). <IMAGE>
IL10295892A 1991-08-31 1992-08-26 Tube conduit connection and method of producing the same from polyolefins IL102958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91114686A EP0530387B2 (en) 1991-08-31 1991-08-31 Pipeline connection and method of manufacturing pipeline connections made of polyolefine

Publications (2)

Publication Number Publication Date
IL102958A0 true IL102958A0 (en) 1993-01-31
IL102958A IL102958A (en) 1995-07-31

Family

ID=8207102

Family Applications (1)

Application Number Title Priority Date Filing Date
IL10295892A IL102958A (en) 1991-08-31 1992-08-26 Tube conduit connection and method of producing the same from polyolefins

Country Status (23)

Country Link
EP (1) EP0530387B2 (en)
JP (1) JP3223977B2 (en)
KR (1) KR100250347B1 (en)
AT (1) ATE129795T1 (en)
AU (1) AU669665B2 (en)
CA (1) CA2116561A1 (en)
CZ (1) CZ286291B6 (en)
DE (1) DE59106833D1 (en)
DK (1) DK0530387T4 (en)
ES (1) ES2081406T5 (en)
FI (1) FI940864L (en)
GR (2) GR3018275T3 (en)
HK (1) HK100096A (en)
HU (1) HU215296B (en)
IL (1) IL102958A (en)
NO (1) NO311952B1 (en)
NZ (1) NZ244134A (en)
PL (1) PL170053B1 (en)
PT (1) PT100823B (en)
SK (1) SK282175B6 (en)
TR (1) TR27381A (en)
WO (1) WO1993005332A1 (en)
ZA (1) ZA926585B (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398725B (en) * 1992-10-21 1995-01-25 Schnallinger Helfried Ing METHOD FOR PRODUCING EXHAUST SLEEVES ON PLASTIC PIPES
DE4310000C2 (en) * 1993-03-27 2002-03-28 Wirsbo Pex Gmbh Pipe connection, pipe connector and use of a hydraulic device for making pipe connections
DE9417116U1 (en) * 1994-10-25 1995-01-19 Wirsbo Rohrproduktion und Vertriebs-GmbH, 63150 Heusenstamm Multiple pipe connector
FI108574B (en) * 1995-06-09 2002-02-15 Uponor Suomi Oy Shrinkage connection between pipes
EP0963833B1 (en) * 1998-06-11 2002-08-14 SICA S.p.A. Tool with multiple operative phases, to form stable bell mouths in terminal junction sections of pipes made of thermoplastic material
FI20020107A0 (en) 2002-01-21 2002-01-21 Uponor Innovation Ab R ÷ rstuds
JP2005180662A (en) 2003-12-22 2005-07-07 Honda Motor Co Ltd Quick connector with resin tube
EP1741968A1 (en) 2005-07-08 2007-01-10 Uponor Innovation Ab Clamping ring
FI119657B (en) * 2006-08-25 2009-01-30 Uponor Innovation Ab Method and apparatus for connecting pipes to connecting piece and pipe connection
US8431067B2 (en) * 2007-03-06 2013-04-30 Mercury Plastics, Inc. Method for making a reservoir
WO2009004407A1 (en) 2007-07-02 2009-01-08 Uponor Innovation Ab Method of forming a clamping ring and a clamping ring
US8146225B2 (en) 2007-12-14 2012-04-03 Uponor Innovation Ab Method of forming a clamping ring and a clamping ring
EP2481966A1 (en) 2011-02-01 2012-08-01 Uponor Innovation AB Clamping ring
US11541581B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Injection molded cold-expansion compression collar
US11543065B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Extruded cold-expansion compression collar
US11054076B2 (en) 2016-11-04 2021-07-06 Zurn Industries, Llc Reinforcing ring with sleeve
CN107696390B (en) 2017-11-01 2019-07-12 乐清市东博机电有限公司 A method of manufacturing a clamping ring, equipment for manufacturing the clamping ring, and injection molding machine
FR3114860B1 (en) 2020-10-05 2022-08-19 Stelia Aerospace Aircraft fluid line comprising a thermoplastic pipe and a connector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE390802B (en) * 1973-11-27 1977-01-24 Atomenergi Ab PROCEDURE FOR ASSEMBLING DETAILS OF WORKED POLYMERS
EP0102919A3 (en) * 1982-08-30 1985-05-22 HUBER &amp; SUHNER AG KABEL-, KAUTSCHUK-, KUNSTSTOFF-WERKE Method of connecting tubes, and connection manufactured according thereto
FR2555283B1 (en) * 1983-11-22 1986-08-22 Gresle Paul TUBE CONNECTION SYSTEM
DE3817442C2 (en) * 1988-05-21 1994-02-03 Platzer Schwedenbau Gmbh Clampless pipe connection

Also Published As

Publication number Publication date
EP0530387B2 (en) 1999-10-06
AU669665B2 (en) 1996-06-20
PT100823A (en) 1994-05-31
TR27381A (en) 1995-02-01
NO940672D0 (en) 1994-02-25
CZ32294A3 (en) 1994-05-18
CZ286291B6 (en) 2000-03-15
HUT69886A (en) 1995-09-28
FI940864A0 (en) 1994-02-24
EP0530387A1 (en) 1993-03-10
DK0530387T4 (en) 2000-04-17
SK282175B6 (en) 2001-11-06
SK21594A3 (en) 1994-08-10
KR100250347B1 (en) 2000-04-01
GR3032196T3 (en) 2000-04-27
PT100823B (en) 2001-05-31
JP3223977B2 (en) 2001-10-29
HU9400390D0 (en) 1994-05-30
IL102958A (en) 1995-07-31
FI940864L (en) 1994-02-24
KR940702257A (en) 1994-07-28
HU215296B (en) 1998-11-30
HK100096A (en) 1996-06-14
NO311952B1 (en) 2002-02-18
AU2440192A (en) 1993-04-05
GR3018275T3 (en) 1996-02-29
JPH06509994A (en) 1994-11-10
NZ244134A (en) 1994-07-26
NO940672L (en) 1994-02-25
WO1993005332A1 (en) 1993-03-18
ATE129795T1 (en) 1995-11-15
DK0530387T3 (en) 1996-03-04
PL170053B1 (en) 1996-10-31
ES2081406T3 (en) 1996-03-01
EP0530387B1 (en) 1995-11-02
ZA926585B (en) 1993-03-12
CA2116561A1 (en) 1993-03-18
DE59106833D1 (en) 1995-12-07
ES2081406T5 (en) 2000-01-16

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Legal Events

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CB Opposition filed against grant of patent

Free format text: 13.10.95

NP Permission for amending the patent specification granted (section 66, patents law 1967)
CB Opposition filed against grant of patent