Inventor:Threlfall; Ian M.
No. of patents:1
||Title Of Patent
||Process for manufacturing photochromic articles
||July 25, 1989|
|A direct casting process for manufacturing a shaped synthetic plastic article, such as an ophthalmic lens, which has photochromic properties, the process comprising incorporating a photochromic spiro-oxazine compound into a mixture comprising a highly reactive polyfunctional monomer and |