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:
Dec. 03, 1996
Filed:
Apr. 05, 1994
Applicant:
Inventors:
Jiri S Sulc, Newport Beach, CA (US);
Joseph E Vigh, Placentia, CA (US);
Assignee:
Allergan, Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B08B / ; B08B / ; C09G / ; A61K / ;
U.S. Cl.
CPC ...
134-7 ; 428407 ; 428403 ; 510113 ;
Abstract
Compositions and methods for treating a contact lens are disclosed. In one embodiment, the composition comprises an ophthalmically acceptable liquid aqueous medium and a plurality of particles which possess a hardness gradient. The hardness gradient of the particles is due to the particles having a relatively inelastic, water-impermeable core and a soft, water-permeable outer layer surrounding the core. The particles afford both high specific pressure on a contact lens surface and textural softness, which diminishes surface abrasion.