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:
May. 11, 1993
Filed:
Jan. 03, 1992
Stanley W Huth, Newport Beach, CA (US);
Sam W Lam, Laguna Niguel, CA (US);
Abraham M Espiritu, Oceanside, CA (US);
Allergan, Inc., Irvine, CA (US);
Abstract
A method for removing yellow contact lens discoloration involves immersing yellow colored contact lenses in a solution including a proteolytic enzyme and a reducing agent and then heating the solution for a time and at a temperature sufficient to remove substantially all yellow contact lens discoloration. The method also functions to simultaneously clean, disinfect and remove yellow discoloration from a contact lens. The lens is immersed in an aqueous solution including an effective amount of a thiol and an enzyme, and the solution is heated above ambient temperature for a time and at a temperature sufficient to remove substantially all yellow contact lens discoloration and contact lens protein accretions and to disinfect the lens. Preferably the solution is heated to a maximum temperature in a range of approximately 80.degree. C. to approximately 90.degree. C.