C - Chemistry – Metallurgy – 07 – D
Inventor
C - Chemistry, Metallurgy
07
D
Inventor
Country: Germany
H-annellated benzo[f]chromenes
Heterocyclically anellated indenochromene derivatives
High index curable photochromic composition and its process
Neutral-color gray photochromic plastic article
Photochromic h-fused benzo[f]chromene derivatives
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