Inventor

NELSON CLARA M

US2 patents

Patents

2 patents

US6348604B1Feb 19, 2002

Photochromic naphthopyrans

PPG IND OHIO INC240 citations98

US6296785B1Oct 2, 2001

Indeno-fused photochromic naphthopyrans

PPG IND OHIO INC349 citations97