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Friedrich Siebers
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Mainz, DE
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last 30 patents
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Patent Grant
Lead-and cadmium-free glass composition for glazing, enameling and...
Patent number
5,633,090
Issue date
May 27, 1997
Schott Glaswerke
Erich Rodek
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Glass powder which is crystallizable to yield a sintered glass cera...
Patent number
5,250,474
Issue date
Oct 5, 1993
Schott Glaswerke
Friedrich Siebers
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Process for the manufacture of open porous sintered bodies being pr...
Patent number
4,904,291
Issue date
Feb 27, 1990
Schott Glaswerke
Friedrich Siebers
C03 - GLASS MINERAL OR SLAG WOOL