Inventor · disambiguated record
Udo Weigand
Also filed as: WEIGAND UDO
28 granted patents·3 pending applications·384 citations·filing 1998–2023
96Inventor score
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31 records- 0195US6146554APhotochromic naphtopyrane colorants, method for the production and use thereof, photochromic objectRODENSTOCK OPTIK G·Filed 1998·Granted Nov 14, 2000·103 cites·27 claims
- 0293US6683709B2Photochromic pyran compoundsRODENSTOCK GMBH·Filed 2002·Granted Jan 27, 2004·40 cites·10 claims
- 0392US6315928B1SpirofluorenopyransRODENSTOCK OPTIK G·Filed 2000·Granted Nov 13, 2001·36 cites·7 claims
- 0488US6660727B1Photochromic heterocyclically anellated indenochromene compoundsRODENSTOCK GMBH·Filed 2000·Granted Dec 9, 2003·24 cites·7 claims
- 0586US6225466B1Photochromic spirofluorenopyran compoundsRODENSTOCK OPTIK G·Filed 1999·Granted May 1, 2001·35 cites·10 claims
- 0684US6373615B1Neutral-colored gray photochromic plastic objectRODENSTOCK OPTIK G·Filed 1999·Granted Apr 16, 2002·56 cites·8 claims
- 0781US6331625B1Photochromic spirofluorenopyran compoundsRODENSTOCK OPTIK G·Filed 2000·Granted Dec 18, 2001·10 cites·21 claims
- 0879US7459555B2Photochromic naphthopyransRODENSTOCK GMBH·Filed 2001·Granted Dec 2, 2008·8 cites·8 claims
- 0975US7544315B2Photochromic h-annellated benzo[f]chromene compoundsRODENSTOCK GMBH·Filed 2007·Granted Jun 9, 2009·3 cites·9 claims
- 1074US8933220B2Photochromic fused naphthopyrans having a benzene ring which is adjacent to the pyran oxygen and is linked to the para substituent via both meta positionsMELZIG MANFRED·Filed 2011·Granted Jan 13, 2015·2 cites·14 claims
- 1173US8013174B2Photochromic spirodihydrophenanthropyransRODENSTOCK GMBH·Filed 2008·Granted Sep 6, 2011·1 cites·9 claims
- 1273US6686468B2H-annellated benzo[f]chromenesRODENSTOCK OPTIK G·Filed 2001·Granted Feb 3, 2004·6 cites·12 claims
- 1371US8486312B2Photochromic naphthopyrans having a double-bridged terphenyl sub-unitMELZIG MANFRED·Filed 2009·Granted Jul 16, 2013·1 cites·20 claims
- 1466US6306316B1Photochromic plastic objectRODENSTOCK OPTIK G·Filed 1999·Granted Oct 23, 2001·28 cites·15 claims
- 1564US6881850B2Heterocyclically annellated indenochromene derivativesRODENSTOCK GMBH·Filed 2003·Granted Apr 19, 2005·4 cites·6 claims
- 1662US8236716B2Photochromic benzopyrano-benzopyrans with further fusingMELZIG MANFRED·Filed 2008·Granted Aug 7, 2012·1 cites·24 claims
- 1761US6342459B1Photochromic naphthopyransRODENSTOCK OPTIK G·Filed 1999·Granted Jan 29, 2002·22 cites·9 claims
- 1859US2025092262A1Combination of specific annellated naphthopyrane isomersRODENSTOCK GMBH·Filed 2023·Application pending·0 cites
- 1957US2025296288A1Method for providing a substrate with a tint and a functional coloringRODENSTOCK GMBH·Filed 2023·Application pending·0 cites
- 2054US7229989B2Blue 3H-naphtho[2,1-b]pyran compounds and use thereof in photochromic articlesRODENSTOCK GMBH·Filed 2004·Granted Jun 12, 2007·3 cites·12 claims
- 2149US11965102B2Photochromic annelated naphthopyrane systems with special substituents, for attaining rapid lightening speedsRODENSTOCK GMBH·Filed 2019·Granted Apr 23, 2024·0 cites·5 claims
- 2249US7922941B2Photochromic plastic objectRODENSTOCK GMBH·Filed 2008·Granted Apr 12, 2011·0 cites·12 claims
- 2349US7892296B2Photochromic benzopyransRODENSTOCK GMBH·Filed 2008·Granted Feb 22, 2011·0 cites·14 claims
- 2448US7229576B2Substituted phenanthropyransRODENSTOCK GMBH·Filed 2006·Granted Jun 12, 2007·0 cites·9 claims
- 2548US2006011898A1Neutral-color gray photochromic synthetic resin articleRODENSTOCK GMBH·Filed 2005·Application pending·0 cites
- 2646US6967249B2Photochromic 3H-naphtho[2,1-b]-pyran compounds and photochromic articles produced therewithRODENSTOCK GMBH·Filed 2004·Granted Nov 22, 2005·1 cites·10 claims
- 2745US10077274B2UV-curing-compatible photochromic fused naphthopyransRODENSTOCK GMBH·Filed 2014·Granted Sep 18, 2018·0 cites·5 claims
- 2840US10647852B2Photochromic multiple ring-fused naphthopyrans having extreme longwave absorption extending far into the visible wavelength rangeRODENSTOCK GMBH·Filed 2017·Granted May 12, 2020·0 cites·12 claims
- 2940US8987477B2Photochromic bis-idenofused naphthopryansWEIGAND UDO·Filed 2012·Granted Mar 24, 2015·0 cites·8 claims
- 3039US9963574B2Photochromic fluorenopyrans with defined dibenzo[B,D]pyrano fused attachmentWEIGAND UDO·Filed 2013·Granted May 8, 2018·0 cites·9 claims
- 3138US9151872B2Photochromic double-fused naphthopyransWEIGAND UDO·Filed 2012·Granted Oct 6, 2015·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →