Hydrogen peroxide destroying compositions and methods of making and using same
CA 2097062 C · Owner: Allergan, Inc. · Inventors: Park, John Y.; Cook, James N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions, and methods useful for making such compositions and for using such compositions, which are useful to destroy hydrogen peroxide in a liquid aqueous medium such as that used to , disinfect contact lenses are disclosed. The composition, comprises at least one item containing a hydrogen peroxide destroying component, e:g. catalase, effective when released in a liquid aqueous medium to destroy or cause the destruction of hydrogen peroxide present in liquid aqueous medium, and a barrier costing located on at least one item and acting to substantially prevent the release of the hydrogen peroxide destroying component for a period of time after the composition is initially …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 17, 1991 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.