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:
Feb. 07, 2012
Filed:
Jun. 18, 2009
Ronald Berzon, Saint Petersburg, FL (US);
Leo Charles Collett, Dunedin, FL (US);
Ronald Berzon, Saint Petersburg, FL (US);
Leo Charles Collett, Dunedin, FL (US);
Essilor International (Compagnie Generale d'Optique), Charenton, Cedex, FR;
Transitions Optical, Inc., Pinellas Park, FL (US);
Abstract
A photochromic coating exhibiting improved performance and photochromic lenses made using the coating. The coating has excellent photochromic darkening and fatigue properties. The coating formulation is made from a monomer blend having at least two different types of monomers. A metal salt catalyst is used along with an initiator. An antioxidant is used in combination with a hindered amine light stabilizer. The coating is suitable for use in an in-mold coating process.