US Patent 9029565 Fused ring indeno compounds for preparation of photochromic compounds

Patent 9029565 was granted and assigned to Transitions Optical on May, 2015 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Patent Applicant

Transitions Optical

Current Assignee

Transitions Optical

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

90295650

Patent Inventor Names

Anil Kumar0

Massimiliano Tomasulo0

Meng He0

Date of Patent

May 12, 2015

Patent Application Number

140848300

Date Filed

November 20, 2013

Patent Citations Received

‌

US Patent 11963868 Double-sided aspheric diffractive multifocal lens, manufacture, and uses thereof

Patent Primary Examiner

‌

Michael Barker

Patent abstract

The present invention relates to intermediate compounds represented by the following Formula (I-A),

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