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. 08, 2005
Filed:
Aug. 30, 2002
Applicants:
Thomas J. Engardio, Vista, CA (US);
Paul D. Schlunt, Oceanside, CA (US);
Inventors:
Thomas J. Engardio, Vista, CA (US);
Paul D. Schlunt, Oceanside, CA (US);
Assignee:
Signet Armorlite, Inc., San Marcos, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B005/23 ; G02C007/10 ; C08K005/35 ;
U.S. Cl.
CPC ...
Abstract
Photochromic compositions are disclosed herein. The compositions comprise mixtures of methacrylate monomers, which when polymerized, provide a polymer matrix that exhibits improved fading characteristics of incorporated photochromic dyes and good photochromic temperature stability. The compositions are particularly useful as a composite layer on polymer-based ophthalmic lenses.