Inventor
VAN GEMERT BARRY
US47 patents
⚠️ This page may combine multiple inventors who share the name “VAN GEMERT BARRY”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TRANSITIONS OPTICAL INC
18 patentsUS5658501AAug 19, 1997
Substituted naphthopyrans
TRANSITIONS OPTICAL INC345 citations99
US5645767AJul 8, 1997
Photochromic indeno-fused naphthopyrans
TRANSITIONS OPTICAL INC529 citations99
US5466398ANov 14, 1995
Photochromic substituted naphthopyran compounds
TRANSITIONS OPTICAL INC260 citations99
US5458814AOct 17, 1995
Substituted naphthopyrans
TRANSITIONS OPTICAL INC230 citations99
US5451344ASep 19, 1995
Photochromic naphthopyran compounds
TRANSITIONS OPTICAL INC131 citations99
US7584630B2Sep 8, 2009
Photochromic ocular devices
TRANSITIONS OPTICAL INC67 citations98
US7556750B2Jul 7, 2009
Photochromic materials with reactive substituents
TRANSITIONS OPTICAL INC100 citations98
US5651923AJul 29, 1997
Substituted naphthopyrans
TRANSITIONS OPTICAL INC105 citations98
US6630597B1Oct 7, 2003
Photochromic 6-aryl substituted 3H-naphtho(2,1-b)pyrans
TRANSITIONS OPTICAL INC141 citations97
US5674432AOct 7, 1997
Photochromic naphthopyran compounds
TRANSITIONS OPTICAL INC41 citations96
US5658500AAug 19, 1997
Substituted naphthopyrans
TRANSITIONS OPTICAL INC60 citations96
US5637262AJun 10, 1997
Photochromic substituted naphthopyran compounds
TRANSITIONS OPTICAL INC52 citations96
US5578252ANov 26, 1996
Photochromic substituted naphthopyran compounds
TRANSITIONS OPTICAL INC76 citations96
US5565147AOct 15, 1996
Photochromic naphthopyran compounds
TRANSITIONS OPTICAL INC55 citations96
US5753146AMay 19, 1998
Photochromic naphthopyran compositions of neutral color
TRANSITIONS OPTICAL INC116 citations93
US7556751B2Jul 7, 2009
Photochromic materials having electron-withdrawing substituents
TRANSITIONS OPTICAL INC24 citations92
US7094368B2Aug 22, 2006
Pyrano-quinolines, pyrano-quinolinones, combinations thereof, photochromic compositions and articles
TRANSITIONS OPTICAL INC22 citations92
US9073838B2Jul 7, 2015
Method of making indeno-fused naphthol materials
TRANSITIONS OPTICAL INC0 citations52
PPG INDUSTRIES INC
16 patentsUS5869658AFeb 9, 1999
Photochromic indeno-fused naptho 2,1-b!pyrans
PPG INDUSTRIES INC87 citations96
US5552090ASep 3, 1996
Photochromic naphthopyran compounds
PPG INDUSTRIES INC57 citations96
US5244602ASep 14, 1993
Photochromic naphthopyrans
PPG INDUSTRIES INC68 citations96
US5395567AMar 7, 1995
Photochromic spironaphthopyran compounds
PPG INDUSTRIES INC39 citations93
US5340857AAug 23, 1994
Photochromic naphthopyrans
PPG INDUSTRIES INC33 citations93
US5330686AJul 19, 1994
Temperature stable and sunlight protected photochromic articles
PPG INDUSTRIES INC27 citations93
US4741762AMay 3, 1988
Sulfamoyl urea derivatives
PPG INDUSTRIES INC7 citations74
US4666508AMay 19, 1987
Sulfamoyl urea derivatives
PPG INDUSTRIES INC9 citations74
US4622065ANov 11, 1986
Sulfamoyl urea derivatives
PPG INDUSTRIES INC16 citations74
US4559081ADec 17, 1985
Sulfamoyl urea derivatives
PPG INDUSTRIES INC7 citations74
US4426527AJan 17, 1984
3-[5- Or 3-substituted-1,2,4-oxadiazol-3- or -5-yl]-1-substituted-4-substituted-5-substituted or unsubstituted-2-imidazolidinones
PPG INDUSTRIES INC18 citations74
US4388473AJun 14, 1983
Substituted benzoic or phenylacetic acid esters having plant growth regulating properties
PPG INDUSTRIES INC8 citations74
US4592776AJun 3, 1986
Sulfamoyl urea derivatives
PPG INDUSTRIES INC4 citations63
US4449998AMay 22, 1984
Herbicidally active oxadiazole ureas
PPG INDUSTRIES INC3 citations63
US4612038ASep 16, 1986
Herbicidally active 3-oxadiazolyl-2-imidazolidinones
PPG INDUSTRIES INC1 citations52
US4602939AJul 29, 1986
Sulfamoyl urea derivatives
PPG INDUSTRIES INC1 citations52
JOHNSON & JOHNSON VISION CARE
3 patentsUS10197707B2Feb 5, 2019
Ophthalmic devices comprising photochromic materials with reactive sub substituents
JOHNSON & JOHNSON VISION CARE58 citations98
US11256002B2Feb 22, 2022
Ophthalmic devices comprising photochromic materials with reactive substituents
JOHNSON & JOHNSON VISION CARE2 citations73
US11874434B2Jan 16, 2024
Ophthalmic devices comprising photochromic materials with reactive substituents
JOHNSON & JOHNSON VISION CARE0 citations62
PPG IND OHIO INC
3 patentsUS6348604B1Feb 19, 2002
Photochromic naphthopyrans
PPG IND OHIO INC240 citations98
US7320826B2Jan 22, 2008
Photochromic articles with reduced temperature dependency and methods for preparation
PPG IND OHIO INC65 citations95
US6106744AAug 22, 2000
Photochromic pyrano-fused naphthopyrans
PPG IND OHIO INC52 citations92