Patent Number: 6,310,215

Title: Pyrazolone compounds and ophthalmic plastic lens using the same

Abstract: Provided are novel pyrazolone compounds which have excellent copolymerizability and undergo no elution in an organic solvent when used for an ophthalmic plastic lens and which have an excellent absorption peak in visible light region and function as a reactive yellow dye.

Inventors: Iwamoto; Hidetoshi (Tokyo, JP)

Assignee: Hoya Healthcare Corporation

International Classification: A61L 27/16 (20060101); A61L 27/00 (20060101); A61L 27/50 (20060101); C09B 69/10 (20060101); C09B 69/00 (20060101); G02B 1/04 (20060101); G02C 007/04 (); C07D 403/06 (); A61K 031/415 (); A61P 027/02 ()

Expiration Date: 10/30/2018