Oriented biopolymeric membrane for meningeal tissue repair
CA 2529789 C · Owner: Hansen, Peggy · Inventors: Li, Shu-Tung; Yuen, Debbie; Hansen, Peggy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cell occlusion sheet membrane adapted for repairing a damaged meningeal tissue. The sheet membrane contains a layer of cross-linked oriented , biopolymeric fibers that has a thickness of 0.1 mm to 3.0 mm a density of 0.1 , g/cm3 to 1.2 g/cm3, a hydrothermal shrinkage temperature of 45~C to 80~C a , suture pullout strength of 0.1 kg to 5 kg a tensile strength of 10 kg/cm2 to , 150 kg/cm2 and permeability to molecules having molecular weights of 200 to 300,000 daltons. Also disclosed is a method for making the membrane.
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 June 28, 2004 and granted September 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2026.
- 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.