Patent classifications
C
CHEMISTRY; METALLURGY
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C03
GLASS; MINERAL OR SLAG WOOL
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C03B
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
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37/00
Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
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C03B37/01
Manufacture of glass fibres or filaments
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C03B37/012
Manufacture of preforms for drawing fibres or filaments
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C03B37/01205
starting from tubes, rods, fibres or filaments
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C03B37/01211
by inserting one or more rods or tubes into a tube
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C03B37/01222
for making preforms of multiple core optical fibres
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