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US 3,954,644 AGranted
Flexible contact lens cleaning, storing, and wetting compositions
AssigneeFlow Pharmaceuticals, Inc.
InventorsJoseph Z. Krezanoski, John C. Petricciani
Life of this patent
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AssigneeFlow Pharmaceuticals, Inc.
InventorsJoseph Z. Krezanoski, John C. Petricciani
Estimating the term…
A contact lens cleaning, storing and wetting solution is provided for cleaning, storing and wetting flexible silicone contact lenses. The solution comprises a poly (oxyethylene)- poly (oxypropylene) block copolymer having a molecular weight between about 1900 and 15,500, a water solubility in excess of about 10 grams per 100 ml., a cloud point in 1 percent aqueous solution above about 30.degree.C., and a Foam Height in excess of 30 mm; a microbial growth inhibitor, such as benzalkonium chloride; purified water; and a sufficient amount of at least one essentially neutral, water-soluble compatible salt to provide a solution salt content equivalent to about 0.5 to 1.8 percent sodium chloride. The solution can also contain disodium or trisodium ethylenediamine tetraacetate and a polymeric viscosity building agent, if desired. A cleaning composition for polyhydroxylated alkyl methacrylate soft contact lenses includes the above poly(oxyethylene)-poly(oxypropylene) block copolymer and sorbic acid as a germicidal ingredient.
An aqueous solution suitable for cleaning, storing and wetting flexible silicone contact lenses which comprise:
A composition for cleaning flexible polyhydroxylated hydrophilic gel contact lenses which comprises:
A composition for cleaning flexible silicone contact lenses and hard polymethyacrylate lenses which comprises:
Dependencies are inferred from the claim text.