Contact-lens care set
CA 1297403 C · Owner: Ciba-Geigy Ag · Inventors: Schafer, Horst; Sunderdiek, Rainer; Ludwig, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification discloses a method of caring for a contact lens and a neutralizing agent for use in a contact lens care set. The set is disclosed as having a container for receiving the neutralizing agent the lens, and a liquid comprising hydrogen peroxide. The neutralizing agent comprises decomposing means for decomposing at least residual hydrogen peroxide on the lens into oxygen and water after the hydrogen peroxide has so sterilized the lens; and retarding agent means for delaying the time at least the decomposing means decomposes the residual hydrogen peroxide after the neutralizing agent is received in the container until after the hydrogen peroxide has so sterilized the lens. The …
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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
- Granted March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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.