Devices for preventing tissue adhesion
CA 2118520 C · Owner: Van Blitterswijk, Clemens A. · Inventors: Bakker, Dirkjan; Van Blitterswijk, Clemens A.; Bakkum, Erika A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for preventing adhesions or binding of tissue to tissue or of tissue to bone which comprises a composite of a first layer and a second layer, each of which comprises a biodegradable polymer. The first layer is selected from the groin consisting of a non-porous layer and a porous layer having a pore size no greater than 3µ. The second layer has pores which have a pore size of from about 30µ to about 250µ. Such a composite device provides for tissue growth into the second layer, while the first layer acts as an adhesion-preventing barrier and enables attachment of the device , to tissue without suturing. Alternatively the device, comprises the first layer herein above mentioned …
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 20, 1993 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2015.
- 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.