Alcon Laboratories, Inc.

Stamicarbon B.v.

Doris Schafer

Rolf Schafer

Jacob K Smid

Werner Schafer

Johan G Aalbers

Novel surfactant compounds are provided of the formula R--CO--NH--(C.sub.2 H.sub.4 O).sub.n --CH.sub.2 COOH, wherein R--CO-- is the residue of at least one aliphatic carboxylic acid of 6-22 carbon atoms and n represents a number having an average of 2-10, as well as their salts with alkali metals, ammonium and amines. These compounds possess not only a low primary toxicity, but also a low secondary toxicity for the skin, and accordingly they are especially useful in cosmetic compositions, compositions for non-automatic dishwashing and laundering compositions for the fine laundry.

Novel polyether carboxylic acid derivatives, as well as their uses

Nontoxic, aqueous, contact lens cleaning compositions containing a weakly anionic surfactant, and optionally also a chelating agent, urea and/or a source of hydrated protons, and methods of chemically removing protein, lipid and calcium deposits from contact lens utilizing these compositions are described.

Method of cleaning contact lens using compositions containing polyether

A sustained release drug delivery system suitable for ophthalmic use is described. The delivery system utilizes a cationic polymer (polyquat) to deliver a drug residue. The drug residue delivered may comprise an anionic drug or a drug-carrier complex.

Sustained release drug delivery system utilizing bioadhesive polymers

A nontoxic, aqueous, contact lens cleaning solution containing a mixture which includes a nonionic or weakly anionic surfactant, a chelating agent, a source of hydrated protons, and optionally also urea; and a method of chemically removing protein, lipid and calcium deposits from contact lens utilizing this solution are described.

Solution and method for removing protein, lipid, and calcium deposits

The improved polymeric hydrogel suitable for use in forming soft contact lenses is described. The hydrogel is improved by means of its resistance to the formation of calcium, lipid and protein deposits thereon. This resistance is achieved by means of covalent modification of the hydrogel with a surfactant.

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Arisdorf, Switzerland

Doris Schafer