Crosslinked ultra-high molecular weight polyethylene (uhmw-pe) containing .alpha.-tocopherol
CA 2526129 C · Owner: Lederer, Klaus · Inventors: Wolf, Christian; Lederer, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is crosslinked, ultrahigh molecular weight polyethylene (UHMW-PE) that is stabilized with a-tocopherol. Such an UHMW-PE can be obtained by letting a-tocopherol diffuse into the crosslinked ultrahigh molecular weight polyethylene. Molded bodies made of said UHMW-PE containing a-tocopherol are provided with high resistance to oxidation which makes said molded bodies , suitable especially for endoprostheses.
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 April 22, 2004 and granted July 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 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.