Method and composition for treating contact lenses
CA 1136841 A · Owner: Allergan Pharmaceuticals, Inc. · Inventors: Kleist, Frederick D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates generally to a method and composition for the treatment of contactlenses to remove inorganic deposits and to prevent the formatin of inorganic deposits on the lenses. One of the problems connected with these types of lenses is the formation, over a period of time of, insoluble inorganic deposits on the lenses. These deposits are thought to be primarily calcium based e.g. calcium, phosphate and calcium cabonate but may also contain other, inorganic materials and associated organic materials e.g. protein. The presence of these insoluble inorganic deposits is a common cause of lens intolerance and decreased visual acuity. The present invention provides a method and …
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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 December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- 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
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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.