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:
Mar. 15, 2011
Filed:
Mar. 16, 2007
Applicants:
Shanti Swarup, Allison Park, PA (US);
Carol L. Knox, Monroeville, PA (US);
Feng Wang, Export, PA (US);
Inventors:
Shanti Swarup, Allison Park, PA (US);
Carol L. Knox, Monroeville, PA (US);
Feng Wang, Export, PA (US);
Assignee:
Transitions Optical, Inc., Pinellas Park, FL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/00 (2006.01); C09K 19/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
Photochromic materials and photochromic compositions and articles including the photochromic materials are disclosed. The photochromic materials may be the reaction product of a hyperbranched polyester polyol having, on average, at least two reactive hydroxyl groups, and at least one photochromic indeno-fused naphthopyran.