Inventor
WEIKARD JAN
DE59 patents
⚠️ This page may combine multiple inventors who share the name “WEIKARD JAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAYER AG
18 patentsUS6599955B1Jul 29, 2003
Radiation-curable urethane acrylates containing iso-cyanate groups and their use
BAYER AG20 citations93
US6323254B1Nov 27, 2001
UV-curable binders and their use for production of high gloss coatings
BAYER AG48 citations93
US6150458ANov 21, 2000
Process for preparing esters of (meth) acrylic acid
BAYER AG31 citations93
US6753394B2Jun 22, 2004
Radiation-hardening coating compositions
BAYER AG45 citations92
US6555597B1Apr 29, 2003
Pulverent binders for powder coating compositions containing oligo- and polyurethanes having (meth)acryloyl groups
BAYER AG23 citations92
US6541536B2Apr 1, 2003
Polyurethane dispersions
BAYER AG34 citations92
US6500876B2Dec 31, 2002
Coating composition containing UV-curable urethane (meth)acrylates containing isocyanate groups and urethane (meth)acrylates containing hydroxyl groups
BAYER AG26 citations92
US6465539B1Oct 15, 2002
Elastic coating system comprising UV-curable urethane (meth)acrylates containing isocyanate groups and its use
BAYER AG38 citations92
US6191181B1Feb 20, 2001
Urethane acrylates and their use in coating compositions
BAYER AG39 citations92
US6521702B1Feb 18, 2003
Aqueous polyurethane emulsions
BAYER AG41 citations90
US6960639B2Nov 1, 2005
Radiation-curing coating compositions
BAYER AG13 citations84
US6710120B2Mar 23, 2004
Polyurethane dispersions based on fatty acid dialkanolamides
BAYER AG17 citations84
US6790485B2Sep 14, 2004
Process for coating substrates
BAYER AG13 citations82
US6569944B2May 27, 2003
Process for preparing urethanes containing (meth)-acryloyl groups as binders for powder coatings
BAYER AG8 citations73
US6809126B2Oct 26, 2004
Solid, radiation-curing powder coating binders and a process for preparing the same
BAYER AG10 citations72
US6902769B2Jun 7, 2005
Process for preparing coatings on porous and/or absorbent materials
BAYER AG2 citations63
US6787627B2Sep 7, 2004
Aqueous coating compositions based on epoxybutene polyethers
BAYER AG4 citations61
US6635699B2Oct 21, 2003
Process for preparing coatings on porous and/or absorbent materials
BAYER AG0 citations52
BAYER MATERIALSCIENCE AG
15 patentsUS7381785B2Jun 3, 2008
Preparation of new radiation-curing binders
BAYER MATERIALSCIENCE AG39 citations92
US7361723B2Apr 22, 2008
Low-viscosity allophanates containing actinically curable groups
BAYER MATERIALSCIENCE AG18 citations92
US7144955B2Dec 5, 2006
Acrylate-functional blocked polyisocyanate resin for UV/thermally curable coatings
BAYER MATERIALSCIENCE AG23 citations91
US7960446B2Jun 14, 2011
Low-viscosity allophanates containing actinically curable groups
BAYER MATERIALSCIENCE AG7 citations84
US7902315B2Mar 8, 2011
Low viscosity allophanates containing actinically curable groups
BAYER MATERIALSCIENCE AG7 citations84
US7666970B2Feb 23, 2010
Radiation-curing binders and a process for their preparation
BAYER MATERIALSCIENCE AG11 citations84
US7981987B2Jul 19, 2011
Aromatic urethane acrylates having a high refractive index
BAYER MATERIALSCIENCE AG11 citations83
US7700662B2Apr 20, 2010
Process for preparing allophanate-containing actinically curable polyurethane prepolymers with increased resistance
BAYER MATERIALSCIENCE AG9 citations83
US7323532B2Jan 29, 2008
Low-viscosity radiation-curing and thermally curing polyisocyanates
BAYER MATERIALSCIENCE AG7 citations73
US7659425B2Feb 9, 2010
Process for preparing hydroxyalkyl(meth) acrylates using Lewis acid catalysts
BAYER MATERIALSCIENCE AG5 citations63
US7641975B2Jan 5, 2010
Hardeners
BAYER MATERIALSCIENCE AG2 citations63
US7553906B2Jun 30, 2009
Dual cure systems
BAYER MATERIALSCIENCE AG4 citations61
US7754827B2Jul 13, 2010
Coated films
BAYER MATERIALSCIENCE AG5 citations60
US7514478B2Apr 7, 2009
Solid, radiation-curing binders with reactive thinners
BAYER MATERIALSCIENCE AG0 citations51
US7381764B2Jun 3, 2008
Radiation-curing binders containing carboxylic acid esters
BAYER MATERIALSCIENCE AG0 citations51
COVESTRO DEUTSCHLAND AG
9 patentsUS11286331B2Mar 29, 2022
Hydrophilically modified polyisocyanurate plastic and process for production thereof
COVESTRO DEUTSCHLAND AG2 citations72
US11286332B2Mar 29, 2022
Hydrophobically modified polyisocyanurate plastic and method for production thereof
COVESTRO DEUTSCHLAND AG2 citations72
US10774239B2Sep 15, 2020
Scratch-resistant two-component polyurethane coatings
COVESTRO DEUTSCHLAND AG3 citations71
US11230522B2Jan 25, 2022
Polyaspartic acid ester compositions which contain polyaspartic acid esters with primary amino groups and small amounts of fumaric acid dialkyl esters
COVESTRO DEUTSCHLAND AG4 citations70
US10815330B2Oct 27, 2020
Thermolatently catalysed two-component system
COVESTRO DEUTSCHLAND AG2 citations69
US12594700B2Apr 7, 2026
Coatings from polyisocyanurate coatings (rim) and their use in injection molding processes
COVESTRO DEUTSCHLAND AG0 citations58
US11124672B2Sep 21, 2021
Frost-resistant water paints based on polyisocyanates
COVESTRO DEUTSCHLAND AG0 citations57
US11555088B2Jan 17, 2023
Dual cure method using Zerewitinoff-active H tin catalysts
COVESTRO DEUTSCHLAND AG0 citations51
US10428174B2Oct 1, 2019
Polyisocyanate mixture based on 1,5-diisocyanatopentane
COVESTRO DEUTSCHLAND AG0 citations50
WEIKARD JAN
2 patentsSOMMER STEFAN
2 patentsCOVESTRO INTELLECTUAL PROPERTY GMBH & CO KG
2 patentsUS11608406B2Mar 21, 2023
Method and system for producing a polyurethane polymer by means of a supported catalyst
COVESTRO INTELLECTUAL PROPERTY GMBH & CO KG0 citations53
US12338360B2Jun 24, 2025
Two-component clear coat systems comprising polyaspartic acid ester
COVESTRO INTELLECTUAL PROPERTY GMBH & CO KG0 citations52
OXIS ENERGY LTD
1 patentLUDEWIG MICHAEL
1 patentShowing the top 50 of 59 patents by PatentIndex Score.