Inventor
RICKWOOD MARTIN
GB14 patents
⚠️ This page may combine multiple inventors who share the name “RICKWOOD MARTIN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PILKINGTON PLC
8 patentsUS4913544AApr 3, 1990
Photochromic articles
PILKINGTON PLC154 citations95
US4851530AJul 25, 1989
Spiro-oxazine compounds
PILKINGTON PLC96 citations95
US5520853AMay 28, 1996
Photochromic compounds
PILKINGTON PLC26 citations89
US5446151AAug 29, 1995
Photo reactive spiro-benzoxazine compounds
PILKINGTON PLC20 citations89
US5623005AApr 22, 1997
Photochromic naphthopyran compounds
PILKINGTON PLC49 citations88
US5833885ANov 10, 1998
Photochromic compounds
PILKINGTON PLC25 citations86
US5446150AAug 29, 1995
Photochromic spiroxazine compounds
PILKINGTON PLC12 citations67
US5446149AAug 29, 1995
Bridged spiroxazine photochromic compounds
PILKINGTON PLC3 citations60
ESSILOR INT
6 patentsUS7713452B2May 11, 2010
Compounds that absorb ultraviolet light, methods of their preparation and optical lenses containing them
ESSILOR INT22 citations86
US7446228B2Nov 4, 2008
Thiophosphine compounds
ESSILOR INT1 citations62
US7622526B2Nov 24, 2009
Thermoset material based on antiplasticizing polythiourethane and ophthalmic lens comprising an antiplasticized thermoset material
ESSILOR INT2 citations57
US7378556B2May 27, 2008
Process for making thiophosphine compounds
ESSILOR INT0 citations51
US7129321B2Oct 31, 2006
Thiophosphine compounds and methods of making polymerizable compositions containing them and their use for making ophthalmic lenses
ESSILOR INT0 citations51
US7732507B2Jun 8, 2010
Spirotetrathiocarbamates and spirooxothiocarbamates
ESSILOR INT0 citations36