Biodegradable film having a honeycomb structure for the prevention of postoperative tissue adhesion
CA 2521916 C · Owner: Kitazono, Eiichi · Inventors: Shimomura, Masatsugu; Fukuhira, Yukako; Kaneko, Hiroaki
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 honeycomb film made of a biodegradable polymer which has biodegradation properties as an anti-adhesion membrane for preventing adhesion after an operation, is excellent in handling properties and exhibits , a satisfactory adhesion preventive effect stably over a desired period of time, and to a production process of the same. Above all, the invention provides an anti-adhesion membrane of a honeycomb film made of polylactic acid as a biodegradable polymer and a phospholipid and a production process of the same.
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 8, 2004 and granted June 25, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 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.