Hydrogen peroxide destroying compositions and methods of making and using same
US5312588A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1991 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Nov 6, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/0078
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A composition and methods useful for making such compositions and for using such compositions to destroy hydrogen peroxide in a liquid aqueous medium, such as that used to disinfect contact lenses, are disclosed. The composition comprises a coated core containing at least one hydrogen peroxide destroying component effective when released into a liquid aqueous medium to destroy or cause the destruction of hydrogen peroxide present in the liquid aqueous medium, and a barrier coating acting to substantially prevent the release of the hydrogen peroxide destroying component for a period of time after the composition is initially contacted with a hydrogen peroxide-containing liquid aqueous medium. The barrier coating is substantially water soluble, preferably includes polyvinylpyrrolidone and is applied as a substantially dry, solid material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.