Inventor
MELZIG MANFRED
DE41 patents
⚠️ This page may combine multiple inventors who share the name “MELZIG MANFRED”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RODENSTOCK OPTIK G
24 patentsUS6146554ANov 14, 2000
Photochromic naphtopyrane colorants, method for the production and use thereof, photochromic object
RODENSTOCK OPTIK G103 citations97
US6373615B1Apr 16, 2002
Neutral-colored gray photochromic plastic object
RODENSTOCK OPTIK G56 citations96
US6102543AAug 15, 2000
Photochromically colored object
RODENSTOCK OPTIK G59 citations96
US6036890AMar 14, 2000
Diaryl-2H-naphthopyrans
RODENSTOCK OPTIK G77 citations96
US5952515ASep 14, 1999
Diaryl-2h-napthopyrans
RODENSTOCK OPTIK G88 citations96
US6171525B1Jan 9, 2001
Process for the production of a photochromic object
RODENSTOCK OPTIK G60 citations94
US4852974AAug 1, 1989
Anti-reflection film for an optical element consisting of an organic material
RODENSTOCK OPTIK G82 citations94
US6342459B1Jan 29, 2002
Photochromic naphthopyrans
RODENSTOCK OPTIK G22 citations92
US6315928B1Nov 13, 2001
Spirofluorenopyrans
RODENSTOCK OPTIK G36 citations92
US6306316B1Oct 23, 2001
Photochromic plastic object
RODENSTOCK OPTIK G28 citations92
US6225466B1May 1, 2001
Photochromic spirofluorenopyran compounds
RODENSTOCK OPTIK G35 citations92
US6190580B1Feb 20, 2001
Diaryl-2H-naphthopyrans
RODENSTOCK OPTIK G25 citations92
US5801243ASep 1, 1998
Photochromic compounds (7)
RODENSTOCK OPTIK G22 citations92
US5707557AJan 13, 1998
Photochromic 3H-naphthopyrans
RODENSTOCK OPTIK G30 citations92
US5645768AJul 8, 1997
Photochromic compounds
RODENSTOCK OPTIK G20 citations92
US5637709AJun 10, 1997
Photochromatic substances
RODENSTOCK OPTIK G29 citations92
US5498686AMar 12, 1996
Optically transparent photochromic plastic material
RODENSTOCK OPTIK G53 citations92
US4959471ASep 25, 1990
Photochrome spiroindoline-oxazines
RODENSTOCK OPTIK G34 citations92
US5399687AMar 21, 1995
Photochrome alkyl substituted spiroindoline compounds
RODENSTOCK OPTIK G19 citations82
US5608065AMar 4, 1997
Photochromatic substances
RODENSTOCK OPTIK G6 citations74
US6331625B1Dec 18, 2001
Photochromic spirofluorenopyran compounds
RODENSTOCK OPTIK G10 citations73
US5990305ANov 23, 1999
Photochromic diaryl-3H-naphthopyrane
RODENSTOCK OPTIK G9 citations73
US4927239AMay 22, 1990
Anti-reflection film for an optical element consisting of an organic material
RODENSTOCK OPTIK G13 citations64
US6686468B2Feb 3, 2004
H-annellated benzo[f]chromenes
RODENSTOCK OPTIK G6 citations62
RODENSTOCK GMBH
14 patentsUS6683709B2Jan 27, 2004
Photochromic pyran compounds
RODENSTOCK GMBH40 citations92
US6660727B1Dec 9, 2003
Photochromic heterocyclically anellated indenochromene compounds
RODENSTOCK GMBH24 citations92
US7459555B2Dec 2, 2008
Photochromic naphthopyrans
RODENSTOCK GMBH8 citations73
US6933325B2Aug 23, 2005
High index curable photochromic composition and its process
RODENSTOCK GMBH10 citations68
US6853471B2Feb 8, 2005
Photochromic synthetic resin object with permanently increased contrast
RODENSTOCK GMBH8 citations66
US7229989B2Jun 12, 2007
Blue 3H-naphtho[2,1-b]pyran compounds and use thereof in photochromic articles
RODENSTOCK GMBH3 citations62
US6936725B2Aug 30, 2005
Photochromic compounds
RODENSTOCK GMBH3 citations62
US6881850B2Apr 19, 2005
Heterocyclically annellated indenochromene derivatives
RODENSTOCK GMBH4 citations62
US7544315B2Jun 9, 2009
Photochromic h-annellated benzo[f]chromene compounds
RODENSTOCK GMBH3 citations61
US6967249B2Nov 22, 2005
Photochromic 3H-naphtho[2,1-b]-pyran compounds and photochromic articles produced therewith
RODENSTOCK GMBH1 citations52
US8013174B2Sep 6, 2011
Photochromic spirodihydrophenanthropyrans
RODENSTOCK GMBH1 citations51
US7922941B2Apr 12, 2011
Photochromic plastic object
RODENSTOCK GMBH0 citations51
US7229576B2Jun 12, 2007
Substituted phenanthropyrans
RODENSTOCK GMBH0 citations41
US7892296B2Feb 22, 2011
Photochromic benzopyrans
RODENSTOCK GMBH0 citations40
MELZIG MANFRED
3 patentsUS8933220B2Jan 13, 2015
Photochromic fused naphthopyrans having a benzene ring which is adjacent to the pyran oxygen and is linked to the para substituent via both meta positions
MELZIG MANFRED2 citations49
US8486312B2Jul 16, 2013
Photochromic naphthopyrans having a double-bridged terphenyl sub-unit
MELZIG MANFRED1 citations49
US8236716B2Aug 7, 2012
Photochromic benzopyrano-benzopyrans with further fusing
MELZIG MANFRED1 citations49