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US 5,494,817 AGranted
Sugar-based protease composition for use with constant-PH borate buffers
AssigneeAllergan, Inc.
InventorJie Chen
Life of this patent
Estimating the term…
Abstract
A composition for cleaning contact lenses includes a protease and a sugar in an amount effective to maintain substantially neutral pH in a borate buffer upon dissolution of the composition therein.
Claims9
A solid composition consisting essentially of
- (a) a protease, and
- (b) a cyclic sugar which will not cause a drop of more than about 0.5 in the pH of a neutral borate buffer;
- wherein the sugar is present in the composition in an amount effective to maintain substantially neutral pH in a borate buffer upon dissolution of said composition therein.
Dependencies are inferred from the claim text.