GB2304736A - ion injected mold for pressing a molded glass substrate - Google Patents

ion injected mold for pressing a molded glass substrate Download PDF

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Publication number
GB2304736A
GB2304736A GB9618034A GB9618034A GB2304736A GB 2304736 A GB2304736 A GB 2304736A GB 9618034 A GB9618034 A GB 9618034A GB 9618034 A GB9618034 A GB 9618034A GB 2304736 A GB2304736 A GB 2304736A
Authority
GB
United Kingdom
Prior art keywords
mold
glass substrate
pressing
ion
metallic mold
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.)
Granted
Application number
GB9618034A
Other versions
GB2304736B (en
GB9618034D0 (en
Inventor
Yasuaki Sakamoto
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24073252&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB2304736(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of GB9618034D0 publication Critical patent/GB9618034D0/en
Publication of GB2304736A publication Critical patent/GB2304736A/en
Application granted granted Critical
Publication of GB2304736B publication Critical patent/GB2304736B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
    • C03B11/086—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor of coated dies
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/02—Pretreatment of the material to be coated
    • C23C16/0254—Physical treatment to alter the texture of the surface, e.g. scratching or polishing
    • C23C16/0263—Irradiation with laser or particle beam
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/02—Pretreatment of the material to be coated
    • C23C16/0272—Deposition of sub-layers, e.g. to promote the adhesion of the main coating
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73913—Composites or coated substrates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/02—Press-mould materials
    • C03B2215/08—Coated press-mould dies
    • C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
    • C03B2215/24—Carbon, e.g. diamond, graphite, amorphous carbon
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/44—Flat, parallel-faced disc or plate products
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/45—Ring or doughnut disc products or their preforms
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Liquid Crystal (AREA)
  • Magnetic Record Carriers (AREA)

Description

SPECIFICATION
2304736 1. TITLE OF THE INVENTION
Mold for pressing and molded glass substrate for computer memory by using it.
2. BACKGROUND OF THE INVENTION
This invention relates to.a mold for pressing glass plates for hard disks for computer memory and molded glass substrates for computer memory pressed by using it.
Up to the present, generally hard disks made of aluminum substrate coated with magnetic materials were used. But because many grinding processes are required to obtain a specified surface roughness on the aluminum substrate, production costs are high.
In consideration of the above, the object of this invention is to provide press molds that are able to obtain a specified surface roughness, and a glass substrate for computer memory devices pressed by the press molds, both at low cost.
3. BRIEF DESCRIPTION OF THE INVENTION
According to this invention, although the metallic mold coated with graphite or amorphous type carbon has required flatness, nitrogen ion is injected onto the surfaces of the super-hard mold material just before carbon coating, and the surface layer of the mold is modified.
Due to this process, it becomes possible to increase the adhesiveness of the carbon onto the mold and the life of the mold can be greatly extended.
In this invention, ion injection is performed to at least as much as a depth of 0.5 pm of the surface, and thereafter carbon coating is performed as much as 0.1-1pm thickness on the ion-injected surface. Also, the surface is treated so that the flatness reaches 2/1000-8/1000.
Further, according to this invention, glass plates for glass substrates for computer memory are molded by using the metallic mold on which the surface has been modified by injecting ion before coating with carbon of graphite or amorphous diamond types.
Z 4. BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 shows a glass substrate for computer memory molded by using a metallic mold according to this invention.
5. DETAILED DESCRIPTION OF THE INVENTION
The embodiment of this invention is described in detail as follows. Herein, a metallic mold made of super-hard material, having a surface plane of more than 8/1000 is modified in forming Gauss distribution on the surface layer by ion injection such as a Nitrogen atomic ion in advance of coating with graphite or amorphous diamond-type carbon.
Namely, an ion-injected layer is shaped to a depth of at least as much as 0.5pm of the surface of a super-hard alloy by ion injection, and then carbon coat is provided in a depth as much as 0.1-1pm on the ion-injected layer, and the last layer of the surface is flattened so as to keep the flatness in the range of 2/1000-8/1000.
By applying the metallic mold according to this invention, it becomes possible to mold a glass substrate 1 for computer memory shown in the drawings.
In the ion-injection method applying high frequency discharging (105107HZ) it becomes possible to inject ion to a depth of as deep as at least 0.5 into the surface layer of the metallic mold by keeping ionizing current at 10mA, ion irradiation at 100 doses, temperature at 300-500'C, and time for 10-40 seconds, and then the metallic mold is coated with an amorphous diamond type of carbon as much as a thickness of 0.1-lpm on the ionized layer.
For example, if pressing about 63mm glass plate by applying the metallic mold according to this invention, at first the glass plate preshaped in a circular disk is heated to the softening temperature of glass material, then the heated glass plate is charged in the metallic mold heated to the same temperature, and then pressed. After pressing, the pressed 3 glass plate is gradually cooled over 15-20 minutes and cooled down to room temperature. Despite'repeating 100,000 shots of this operation, peeling off of the carbon coat from the surface of the metallic mold was never seen. The effectiveness of this invention is recognize d by the actual results.
The reason that the life of the metallic mold was considerably extended appears to be that the fatigue of the metallic mold is decreased by keeping glass temperature and mold temperature at the same degree, together with the improved peeling off property of the metallic mold owing to the ion radiation.
As described above in detail, in this invention, in advance of carbon coating, the shaped surface of the metallic mold is modified in the surface layer thereof by ion-injection, then it becomes possible to greatly increase the adhesiveness of carbon coat onto the metallic mold and to extend the life of the metallic mold, and further to eliminate the polishing step of the pressed products owing to the high-graded flatness of the molded glass plates.
After obtaining glass substrate by using the mold according to this invention, the surface of the glass substrate is coated with magnetic materials.
4 C L A 1 M S 1. A metallic mold for pressing a molded glass substrate for computer memory, in which a required flatness is secured by coating the surface of said metallic mold made of super- hard material with carbon, wherein said surface of said metallic mold is ion injected and said surface layer is modified in advance of carbon coating.
2. A metallic mold for pressing a molded glass substrate for computer memory as claimed in claim 1, wherein said surface of said mold is ion-injected at least as much as a depth of 0.5pm into said surface layers thereof.
3. A metallic mold for pressing a glass plate as claimed in claim 1, wherein said carbon coating is as much as 0.1-lpm thickness on said ionized layer.
4. Molded glass plate for glass substrate for computer memory pressformed by using a metallic mold made of superhard material, said metallic mold being provided with required flatness by carbon coating on said surface thereof, and said surface being modified by ion injection in advance of carbon coating.
5. A metallic mold substantially as hereinbefore described with reference to the accompanying drawings.
6. A method of forming a molded glass plate comprising the steps of providing a mold according to claim 1, 2, 3 or 5 and press-forming said plate using said mold.
GB9618034A 1995-08-29 1996-08-29 Ion injected mold for pressing a molded glass substrate Expired - Fee Related GB2304736B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52058595A 1995-08-29 1995-08-29

Publications (3)

Publication Number Publication Date
GB9618034D0 GB9618034D0 (en) 1996-10-09
GB2304736A true GB2304736A (en) 1997-03-26
GB2304736B GB2304736B (en) 1999-09-22

Family

ID=24073252

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9618034A Expired - Fee Related GB2304736B (en) 1995-08-29 1996-08-29 Ion injected mold for pressing a molded glass substrate

Country Status (13)

Country Link
JP (2) JP2909724B2 (en)
KR (1) KR100385257B1 (en)
CN (1) CN1102470C (en)
AU (1) AU718549B2 (en)
CA (1) CA2184206C (en)
DE (1) DE19634974A1 (en)
FR (1) FR2738236B1 (en)
GB (1) GB2304736B (en)
IL (1) IL119144A0 (en)
MY (1) MY115041A (en)
NL (1) NL1003899C2 (en)
SG (1) SG47172A1 (en)
ZA (1) ZA967329B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6332338B1 (en) 1997-07-30 2001-12-25 Hoya Corporation Method of producing glass substrate for information recording medium
NL1008105C2 (en) * 1998-01-23 1999-07-26 Axxicon Moulds Eindhoven Bv Injection mold.
JP2002079522A (en) * 2000-06-23 2002-03-19 Hitachi Maxell Ltd Die for molding disk substrate and die for molding resin
JP4702201B2 (en) * 2006-06-28 2011-06-15 東洋製罐株式会社 Resin processing parts

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0259450A (en) * 1988-08-24 1990-02-28 Matsushita Electric Ind Co Ltd Mold for press-molding optical glass element
US5026415A (en) * 1988-08-16 1991-06-25 Canon Kabushiki Kaisha Mold with hydrogenated amorphous carbon film for molding an optical element
GB2247692A (en) * 1990-09-01 1992-03-11 Atomic Energy Authority Uk Preparing diamond-like carbon coatings involving a foundation layer; apparatus therefor
US5112025A (en) * 1990-02-22 1992-05-12 Tdk Corporation Molds having wear resistant release coatings
US5202156A (en) * 1988-08-16 1993-04-13 Canon Kabushiki Kaisha Method of making an optical element mold with a hard carbon film
JPH05105460A (en) * 1991-10-11 1993-04-27 Olympus Optical Co Ltd Mold for molding optical element
US5246198A (en) * 1990-06-01 1993-09-21 Canon Kabushiki Kaisha Diamond crystal coated mold for forming optical elements
JPH0665718A (en) * 1991-07-26 1994-03-08 Nippon Tungsten Co Ltd Mold material for forming
US5308707A (en) * 1991-10-07 1994-05-03 Nitruvid Treatment process for depositing a layer of carbon in vapour phase on the surface of a metal article and article thus obtained
US5347887A (en) * 1993-03-11 1994-09-20 Microsurgical Techniques, Inc. Composite cutting edge
JPH06320636A (en) * 1993-05-12 1994-11-22 Canon Inc Production of mold for molding optical element
GB2300424A (en) * 1995-05-01 1996-11-06 Kobe Steel Europ Ltd Diamond growth on ion implanted surfaces

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
CA968560A (en) * 1970-11-27 1975-06-03 Gerald E. Blair Method for molding glass lenses
DE3533856A1 (en) * 1985-09-23 1987-05-21 Wilhelm Koenig Apparatus for producing hard discs of glass
JPS6483529A (en) * 1987-09-28 1989-03-29 Hoya Corp Production of glass forming mold
DE3800567A1 (en) * 1988-01-12 1989-07-20 Wilhelm Koenig Compression mould for pressing hard glass diskettes
DE3808380A1 (en) * 1988-03-12 1989-09-21 Wilhelm Koenig Process for embossing fixed programs on glass discs and apparatus for carrying out the process
JPH01301864A (en) * 1988-05-31 1989-12-06 Hoya Corp Manufacture of glass forming die
US5380349A (en) * 1988-12-07 1995-01-10 Canon Kabushiki Kaisha Mold having a diamond layer, for molding optical elements
JP2572438B2 (en) * 1989-01-30 1997-01-16 ホーヤ株式会社 Manufacturing method of glass press mold
JP2837700B2 (en) * 1989-08-23 1998-12-16 ティーディーケイ株式会社 Method for forming diamond-like thin film
US5125945A (en) * 1991-04-09 1992-06-30 Corning Incorporated Method and apparatus for parallel alignment of opposing mold surfaces by controlling the thermal expansion of the apparatus
JPH0790553A (en) * 1993-09-27 1995-04-04 Shojiro Miyake Sliding member and its production
JPH07109128A (en) * 1993-10-12 1995-04-25 Hoya Corp Mold for molding glass and its production
US5458927A (en) * 1995-03-08 1995-10-17 General Motors Corporation Process for the formation of wear- and scuff-resistant carbon coatings

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5026415A (en) * 1988-08-16 1991-06-25 Canon Kabushiki Kaisha Mold with hydrogenated amorphous carbon film for molding an optical element
US5202156A (en) * 1988-08-16 1993-04-13 Canon Kabushiki Kaisha Method of making an optical element mold with a hard carbon film
JPH0259450A (en) * 1988-08-24 1990-02-28 Matsushita Electric Ind Co Ltd Mold for press-molding optical glass element
US5112025A (en) * 1990-02-22 1992-05-12 Tdk Corporation Molds having wear resistant release coatings
US5246198A (en) * 1990-06-01 1993-09-21 Canon Kabushiki Kaisha Diamond crystal coated mold for forming optical elements
GB2247692A (en) * 1990-09-01 1992-03-11 Atomic Energy Authority Uk Preparing diamond-like carbon coatings involving a foundation layer; apparatus therefor
JPH0665718A (en) * 1991-07-26 1994-03-08 Nippon Tungsten Co Ltd Mold material for forming
US5308707A (en) * 1991-10-07 1994-05-03 Nitruvid Treatment process for depositing a layer of carbon in vapour phase on the surface of a metal article and article thus obtained
JPH05105460A (en) * 1991-10-11 1993-04-27 Olympus Optical Co Ltd Mold for molding optical element
US5347887A (en) * 1993-03-11 1994-09-20 Microsurgical Techniques, Inc. Composite cutting edge
JPH06320636A (en) * 1993-05-12 1994-11-22 Canon Inc Production of mold for molding optical element
GB2300424A (en) * 1995-05-01 1996-11-06 Kobe Steel Europ Ltd Diamond growth on ion implanted surfaces

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
WPI Accession no 90-110397/15 & JP 02 059 450 A *
WPI Accession no 93-172483/21 & JP 05 105 460 A *
WPI Accession no 94-115537/14 & JP 06 065 718 A *
WPI Accession no 95-040776/06 & JP 06 320 636 A *

Also Published As

Publication number Publication date
FR2738236A1 (en) 1997-03-07
MY115041A (en) 2003-03-31
KR100385257B1 (en) 2003-08-09
JP3275091B2 (en) 2002-04-15
ZA967329B (en) 1997-03-04
SG47172A1 (en) 1998-03-20
CA2184206A1 (en) 1997-03-01
DE19634974A1 (en) 1997-03-27
CN1147983A (en) 1997-04-23
CN1102470C (en) 2003-03-05
JP2909724B2 (en) 1999-06-23
FR2738236B1 (en) 1999-03-12
NL1003899A1 (en) 1997-03-03
GB2304736B (en) 1999-09-22
AU6432296A (en) 1997-03-06
KR970010687A (en) 1997-03-27
IL119144A0 (en) 1996-11-14
GB9618034D0 (en) 1996-10-09
JPH09183622A (en) 1997-07-15
CA2184206C (en) 2002-10-08
AU718549B2 (en) 2000-04-13
NL1003899C2 (en) 1998-02-12
JPH09194227A (en) 1997-07-29

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20040829