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:
Jan. 02, 1996
Filed:
May. 20, 1994
Applicant:
Inventors:
Robert A Janssen, Alpharetta, GA (US);
Charlotte L Cooper, Chamblee, GA (US);
Deborah J Mulcahy, Duluth, GA (US);
Judy L Peeples, Atlanta, GA (US);
Leslie F Stebbins, Roswell, GA (US);
Assignee:
Ciba Geigy Corporation, Tarrytown, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; D06P / ;
U.S. Cl.
CPC ...
524100 ; 524417 ; 523106 ; 8507 ; 8549 ;
Abstract
A method and composition useful in fabricating radiation-absorbing contact lenses, especially ultraviolet (UV) and visible (tint) light-absorbing lenses. The radiation-absorber is incorporated into a contact lens in the presence of a buffer which maintains the pH near neutral. Subsequently, the radiation-absorber is chemically affixed to the lens by raising the pH to a highly basic level.