Munchen
Germany
7
2021-08-19
The entities that hold a legal rights for patent applications filed by inventor Weigand Udo:
Udo Weigand from Munchen, DE has applied for patents for these inventions. The list has both pending applications and granted patents:
Photochromic annelated naphthopyrane systems with special substituents, for attaining rapid lightening speeds
#2 | 2019-09-19Photochromic multiple ring-fused naphthopyrans having extreme longwave absorption extending far into the visible wavelength range
#3 | 2016-06-02UV-curing-compatible photochromic fused naphthopyrans
#4 | 2015-06-04Photochromic fluorenopyrans with defined dibenzo[B,D]pyrano fused attachment
#5 | 2014-11-06Photochromic bis-idenofused naphthopryans
#6 | 2014-08-21Photochromic double-fused naphthopyrans
#7 | 2013-11-21Photochromic fused naphthopyrans having a benzene ring which is adjacent to the pyran oxygen and is linked to the para substituent via both meta positions
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