Opthalmic composition
CA 2282757 C · Owner: Lundberg, Kerstin · Inventors: Wik, Ove; Fergeus, Susanna; Lundberg, Kerstin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ophthalmic composition for use in ocular surgery. The composition comprises an aqueous solution of sodium hyaluronate with a concentration within the range of 18 - 40 mg sodium hyaluronate/ml solution and the molecular mass of sodium hyaluronate being in the range of 1x106 - 10x106 Mr,M. The invention also relates to a method for conducting ocular surgery characterized in that the composition is introduced into the eye as a surgical aid. The invention further relates to a method for conducting cataract surgery.
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
- Filed March 6, 1998 and granted June 3, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2020.
- 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.