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. 22, 2005
Filed:
Mar. 01, 2002
Applicants:
Xuzhi Qin, Hacienda Heights, CA (US);
J. Thomas Ippoliti, St. Paul, MN (US);
Inventors:
Xuzhi Qin, Hacienda Heights, CA (US);
J. Thomas Ippoliti, St. Paul, MN (US);
Assignee:
Vision-Ease Lens, Inc., Ramsey, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D405/00 ; C07D409/00 ; C07D313/00 ; C07D309/00 ; C07D335/04 ;
U.S. Cl.
CPC ...
Abstract
Benzodioxino-naphtho[1,2-b]pyran compounds having particularly advantageous photochromic properties, such as, high sensitivity/coloration, two distinct absorption bands in the 430-500 nm range and 520-620 nm range of the visible spectrum may be generally described as a naphthopyran having a central nucleus of the formula:wherein F is a 1,4-benzodioxine ring