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. 14, 2006
Filed:
Oct. 16, 2002
Cletus N. Welch, Massillon, OH (US);
Eric M. King, Pittsburgh, PA (US);
Lawrence G. Anderson, Pittsburgh, PA (US);
Randy E. Daughenbaugh, Turtle Creek, PA (US);
Kevin J. Stewart, Murrysville, PA (US);
Cletus N. Welch, Massillon, OH (US);
Eric M. King, Pittsburgh, PA (US);
Lawrence G. Anderson, Pittsburgh, PA (US);
Randy E. Daughenbaugh, Turtle Creek, PA (US);
Kevin J. Stewart, Murrysville, PA (US);
Transitions Optical, Inc., Pinellas Park, FL (US);
Abstract
Described is a polymerizable composition of a photochromic amount of at least one photochromic compound, at least one material having at least one carbonate group and at least one hydroxyl group, and at least one monoisocyanate containing material having at least one unsaturated group. The polymerizable composition optionally contains copolymerizable monomers. Also described are photochromic polymerizates, e.g., photochromic optical elements such as ophthalmic lenses, prepared from the polymerizable composition of the present invention.