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:
Sep. 01, 2009
Filed:
Oct. 26, 2007
Anil Kumar, Murrysville, PA (US);
Meng He, Murrysville, PA (US);
Terry A. Kellar, Ii, Monroeville, PA (US);
Forrest R. Blackburn, Monroeville, PA (US);
Anil Kumar, Murrysville, PA (US);
Meng He, Murrysville, PA (US);
Terry A. Kellar, II, Monroeville, PA (US);
Forrest R. Blackburn, Monroeville, PA (US);
Transitions Optical, Inc., Pinellas Park, FL (US);
Abstract
Various non-limiting embodiments disclosed herein relate generally to photochromic compounds, which may be thermally reversible or non-thermally reversible, and articles made therefrom. Other non-limiting embodiments relate to photochromic-dichroic compounds, which may be thermally reversible or non-thermally reversible, and articles made therefrom. For example, one non-limiting embodiment provides a thermally reversible, photochromic compound adapted to have at least a first state and a second state, wherein the thermally reversible, photochromic compound has an average absorption ratio greater than 2.3 in at least one state as determined according to CELL METHOD. Another non-limiting embodiment provides a photochromic compound comprising: (a) at least one photochromic group chosen from a pyran, an oxazine, and a fulgide; and (b) at least one lengthening agent L attached to the at least one photochromic group and represented by the formula—[S]-[Q—[S]]-[Q—[S]]-[Q—[S]]—S—P, which is described herein.