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US Patent 7301705 Alicyclic compound for optical material

Patent 7301705 was granted and assigned to Mitsubishi Gas Chemical Company on November, 2007 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee

Mitsubishi Gas Chemical Company

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Motoharu Takeuchi0

Teruo Kamura0

Yuichi Yoshimura0

Date of Patent

November 27, 2007

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Patent Application Number

104747040

Date Filed

June 11, 2002

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Patent Citations Received

US Patent 12071497 High refractive index, high Abbe compositions

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US Patent 11667742 Compositions with high refractive index and Abbe number

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US Patent 11708440 High refractive index, high Abbe compositions

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US Patent 11931296 Systems and methods for vergence matching of an intraocular lens with refractive index writing

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US Patent 11944574 Systems and methods for multiple layer intraocular lens and using refractive index writing

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US Patent 11958923 Compositions with high refractive index and abbe number

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Patent Primary Examiner

Michael J. Feely

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Patent abstract

The alicyclic compound of the present invention has a five- or more membered ring structure having an epithioethylene linkage and/or an epidithioethylene linkage, and has tow or more sulfur atoms in its molecule. Optical materials produced by curing the alicyclic compound or a composition containing the alicyclic compound by polymerization show high refractive index.

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