Extraocular methods of treating the eye with liquid perfluorocarbons
CA 1298202 C · Owner: Haidt, Sterling Joel · Inventors: Haidt, Sterling Joel; Clark, Leland C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Extraocular ophthalmic preparations useful as therapeutic, lubricating or protective agents are disclosed. Liquid perfluorocarbons and substituted derivatives are the active components of the ophthalmic preparations. The neat perfluorocarbon liquids are not aqueous wherefore, isotonicity and pH need not be considered in their preparation. Liquid sterility may be maintained without the addition of preservatives. Cornea and conjunctiva surfaces are provided with greater amounts of oxygen when the perfluorocarbon liquids are employed as eye drops.
Read the whole patent
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 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 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.