Covering device with covering membrane
CA 2114462 C · Owner: Kirsch, Axel · Inventors: Kirsch, Axel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a covering device for the temporary covering of a recess in endogenic bone tissue filled with an osteogenic material. The covering device comprises a covering membrane disposed adjacent the recess and the endogenic bone tissue and a stiffening layer connected to the covering membrane. The covering membrane consists of resorbable membrane material which is more rapidly resorbable from the side remote from the endogenic bone tissue than from the side facing the endogenic bone tissue.
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 January 28, 1994 and granted March 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2016.
- 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.