| (84) |
Designated Contracting States: |
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AT DE FR GB NL |
| (30) |
Priority: |
19.10.1999 JP 29610199
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| (43) |
Date of publication of application: |
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25.04.2001 Bulletin 2001/17 |
| (73) |
Proprietors: |
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- Heraeus Quarzglas GmbH & Co. KG
63450 Hanau (DE)
- SHIN-ETSU QUARTZ PRODUCTS CO., LTD.
Shinjuku-ku,
Tokyo 160-0023 (JP)
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| (72) |
Inventor: |
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- Yamagata, Shigeru, Dr.
Narashino-shi,
Chiba-ken
275-0013 (JP)
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| (74) |
Representative: Staudt, Armin Walter et al |
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Patentanwalt
Auf der Mauer 8 63674 Altenstadt 63674 Altenstadt (DE) |
| (56) |
References cited: :
EP-A- 0 691 312 EP-A- 1 043 282
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EP-A- 0 835 848 US-A- 5 326 729
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- PATENT ABSTRACTS OF JAPAN vol. 1998, no. 1, 30 January 1998 (1998-01-30) -& JP 09
235134 A (SHIN-ETSU QUARTZ PRODUCTS CO LTD), 9 September 1997 (1997-09-09)
- PATENT ABSTRACTS OF JAPAN vol. 2000, no. 2, 29 February 2000 (2000-02-29) & JP 11
302025 A (ASAHI GLASS CO LTD), 2 November 1999 (1999-11-02)
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