Inventor
GEMERT BARRY VAN
US9 patents
⚠️ This page may combine multiple inventors who share the name “GEMERT BARRY VAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TRANSITIONS OPTICAL INC
5 patentsUS6113814ASep 5, 2000
Polymerizable polyalkoxylated naphthopyrans
TRANSITIONS OPTICAL INC379 citations99
US6555028B2Apr 29, 2003
Polymeric matrix compatibilized naphthopyrans
TRANSITIONS OPTICAL INC265 citations98
US5650098AJul 22, 1997
Substituted naphthopyrans
TRANSITIONS OPTICAL INC73 citations96
US7166357B2Jan 23, 2007
Photochromic articles that activate behind ultraviolet radiation blocking transparencies and methods for preparation
TRANSITIONS OPTICAL INC52 citations92
US5656206AAug 12, 1997
Substituted naphthopyrans
TRANSITIONS OPTICAL INC52 citations92
PPG IND OHIO INC
4 patentsUS6296785B1Oct 2, 2001
Indeno-fused photochromic naphthopyrans
PPG IND OHIO INC349 citations97
US5961892AOct 5, 1999
Polyalkoxylated naphthopyrans
PPG IND OHIO INC108 citations97
US7465415B2Dec 16, 2008
Photochromic materials derived from ring-opening monomers and photochromic initiators
PPG IND OHIO INC31 citations92
US7368072B2May 6, 2008
Photochromic contact lenses and methods of manufacturing
PPG IND OHIO INC29 citations91