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:
Nov. 30, 2004
Filed:
Aug. 27, 2002
Applicant:
Inventor:
James Gallas, San Antonio, TX (US);
Assignee:
Photoprotective Technologies, Inc., San Antonio, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/20 ;
U.S. Cl.
CPC ...
G02B 5/20 ;
Abstract
The present invention is directed to a transparent medium incorporating the oxidative polymerization of 3-hydroxykynurenine, a synthetic version of the yellow-to-brown pigment that occurs in the ocular crystalline lens with age. Because this coloration in the ocular lens is believed to offer photoprotection to the retina, it may represent an ideal sun lens filter with an optical transmission spectrum that is compatible with the psychophysical and neuro-physiological characteristics of the vision system.
Gallas, James. (2004). Light filters using the oxidative polymerization product of 3-hydroxykynurenine (3-ohkyn) (U.S. Patent No. 6825975). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6825975
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile