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. 06, 2001
Filed:
Sep. 08, 1998
Applicant:
Inventor:
Gerardo J. Ocampo, Bridgeview, IL (US);
Assignee:
Wesley-Jessen Corporation, Des Plaines, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C 7/10 ; G02C 7/04 ;
U.S. Cl.
CPC ...
G02C 7/10 ; G02C 7/04 ;
Abstract
Adding a small quantity of a violet colorant to a contact lens material provides a clear contact lens that has no apparent undesirable yellow tint, such as caused by a UV-absorbing compound. Further, the violet colorant can also be used with a colored lens, in the absence of the handling tint, to mask any undesirable yellow tint, such as that produced by a UV-absorbing compound. The violet colorant will not unacceptably alter the modifying color of the colored lens.