Hartwig Schaper

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Aschaffenburg, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method of making a jacketed preform for optical fibers using OVD
- Patent number 7,089,765
- Issue date Aug 15, 2006
- Heraeus Tenevo GmbH
- Hartwig Schaper
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Process and apparatus for manufacturing a porous SiO2 preform
- Patent number 6,321,573
- Issue date Nov 27, 2001
- Heraeus Quarzglas GmbH & Co. KG
- Hans-Georg Fritsche
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Method of producing quartz glass bodies
- Patent number 6,047,564
- Issue date Apr 11, 2000
- Heraeus Quarzglas GmbH
- Hartwig Schaper
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Process for manufacture of silica granules
- Patent number 5,643,347
- Issue date Jul 1, 1997
- Heraeus Quarzglas GmbH
- Waltraud Werdecker
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Method of partially introverting a multiple layer tube to form an o...
- Patent number 5,429,653
- Issue date Jul 4, 1995
- Heraeus Quarzglas GmbH
- Helmut Leber
- C03 - GLASS MINERAL OR SLAG WOOL

Patents Applicationslast 30 patents

Information Patent Application
Substrate tube and process for producing a preform for an optical f...
- Publication number 20020136515
- Publication date Sep 26, 2002
- Hartwig Schaper
- C03 - GLASS MINERAL OR SLAG WOOL