Inventor

MARSDEN SEAN D

GB4 patents

Patents

4 patents

US5520853AMay 28, 1996

Photochromic compounds

PILKINGTON PLC26 citations89

US5446151AAug 29, 1995

Photo reactive spiro-benzoxazine compounds

PILKINGTON PLC20 citations89

US5446150AAug 29, 1995

Photochromic spiroxazine compounds

PILKINGTON PLC12 citations67

US5446149AAug 29, 1995

Bridged spiroxazine photochromic compounds

PILKINGTON PLC3 citations60