Inventor
GUGLIELMETTI ROBERT
FR14 patents
⚠️ This page may combine multiple inventors who share the name “GUGLIELMETTI ROBERT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ESSILOR INT
12 patentsUS6281366B1Aug 28, 2001
Photochromic [3H]naphtho[2,1-b]pyran compounds containing an acetylenic substituent, process for their manufacture, and photochromic materials and articles obtained
ESSILOR INT93 citations95
US5139707AAug 18, 1992
Indolino-spiroquinoxalino oxazine photochromatic compounds, methods for their preparation, photochromic compositions and articles containing such compounds
ESSILOR INT97 citations95
US6312811B1Nov 6, 2001
Photochromic naphtho [2,1-b]pyran compounds containing bithienyl or terthienyl substituents, process for their manufacture, and photochromic materials and articles obtained
ESSILOR INT87 citations93
US6019914AFeb 1, 2000
Photochromic spirooxazine compounds, their use in the field of ophthalmic optics
ESSILOR INT85 citations93
US5233038AAug 3, 1993
Photochronic compounds of the indolino-spiro-benzoxazine type
ESSILOR INT28 citations92
US5114621AMay 19, 1992
Indolino-spiro-oxazine photochromic compounds with five-membered rings, method for their preparation, photochromic compositions and articles containing such compounds
ESSILOR INT45 citations92
US5631720AMay 20, 1997
Ophthalmic lenses with heterocyclic chromene compounds
ESSILOR INT25 citations90
US5529725AJun 25, 1996
Spirooxazines and use thereof in the field of ophthalmic optics
ESSILOR INT26 citations90
US5936016AAug 10, 1999
Photochromic compounds and methods for their use
ESSILOR INT28 citations88
US5604280AFeb 18, 1997
Ring spiro [fluorene-[2H]-benzopyranes] and their use in ophthalmic optics
ESSILOR INT25 citations88
US5527911AJun 18, 1996
Heterocyclic chromenes
ESSILOR INT17 citations80
US5754271AMay 19, 1998
Heterocyclic chromenes and their use in the field of ophthalmic optics
ESSILOR INT6 citations68