The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2001
Filed:
Apr. 04, 2000
Applicant:
Inventor:
Hidetoshi Iwamoto, Tokyo, JP;
Assignee:
Hoya Healthcare Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C 7/04 ; C07D / ; A61K 3/14152 ; A61P 2/702 ;
U.S. Cl.
CPC ...
G02C 7/04 ; C07D / ; A61K 3/14152 ; A61P 2/702 ;
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.