GB2169508A — Ophthalmic solutions containing hydroxyethyl cellulose
Assigned to Smith and Nephew PLC · Expires 1986-07-16 · 40y expired
What this patent protects
A sterile aqueous solution suitable for topical application to the eye as an artificial tear in the treatment of 'dry- eye' syndrome and as a comfort drop for wearers of contact lenses is described. The solution contains a hydroxyethyl cellulose together with sufficient of an ion…
USPTO Abstract
A sterile aqueous solution suitable for topical application to the eye as an artificial tear in the treatment of 'dry- eye' syndrome and as a comfort drop for wearers of contact lenses is described. The solution contains a hydroxyethyl cellulose together with sufficient of an ionic tonicity adjusting agent (e.g. an inorganic salt) to give the solution a tonicity value equivalent to that of a solution containing from 0.3 to 1.1% of sodium chloride. Preferred solutions are hypotonic and additionally contain a buffering agent to buffer the solution to a pH value of about 8.0.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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