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US 4,407,791 AGranted
Ophthalmic solutions
AssigneeAlcon Laboratories, Inc.
InventorRaymond L. Stark
Life of this patent
Estimating the term…
Abstract
This invention relates to the quaternary ammonium salt, .alpha.-4-[-tris (2-hydroxyethyl) ammonium chloride-2-butenyl] poly[1-dimethyl ammonium chloride-2-butenyl]-w-tris (2-hydroxyethyl) ammonium chloride, providing aqueous disinfecting solutions for contact lenses as well as a preservative for ocular solutions including contact lens treating solutions.
Claims17
A method of imparting antimicrobial activity to an aqueous ophthalmic contact lens solution comprising:
- adding to said solution from about 0.00001% to about 3.0% by weight/volume of .alpha.-4-[1-tris(2-hydroxyethyl) ammonium chloride-2-butenyl] poly[1-dimethyl ammonium chloride-2-butenyl]-w-tris (2-hydroxyethyl) ammonium chloride as an antimicrobial agent.
A method of disinfecting a contact lens comprising:
- contacting said lens with a solution comprising from about 0.001% to about 0.01% by weight/volume of .alpha.-4-[1-tris(2-hydroxyethyl ammonium chloride-2-butenyl] poly[1-dimethyl ammonium chloride-2-butenyl]-w-tris (2-hydroxyethyl) ammonium chloride as an antimicrobial agent.
Dependencies are inferred from the claim text.