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:
Jul. 08, 2008
Filed:
Feb. 20, 2007
Mamoru Tanaka, Omuta, JP;
Shigetoshi Kuma, Omuta, JP;
Munehito Funaya, Sodegaura, JP;
Seiichi Kobayashi, Omuta, JP;
Mamoru Tanaka, Omuta, JP;
Shigetoshi Kuma, Omuta, JP;
Munehito Funaya, Sodegaura, JP;
Seiichi Kobayashi, Omuta, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A composition for making a high-refractive-index resin contains a polythiol compound and a compound containing at least two iso(thio)cyanato groups, the polythiol compound having a dithioacetal, dithioketal, orthotrithioformic ester, or orthotetrathiocarbonic ester skeleton. The molar ratio of the mercapto group to the iso(thio)cyanato group in the composition is greater than 1.0 but not more than 3.0. A method for making a resin by curing the composition, a resin prepared by curing the composition, an optical element made from the resin, and a lens made from the optical element are also provided.