Expandable stents and method of making same
CA 2079417 C · Owner: Hartigan, William M. · Inventors: Hartigan, William M.; Frantzen, John J.; Lau, Lilip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to an expandable scent for implantation in a body lumen, such, a an artery, and a method for making it from a single length of tubing. The scent, consists of a plurality of radially expandable cylindrical elements generally aligned on, a common axis and interconnected by one or more interconnective elements. The individual radially expandable cylindrical elements consist of ribbon-like material, disposed in an undulating pattern. The stents are made by coating a length of tubing with, an etchant-resistive material and then selectively removing portions of the coating to form, a pattern for the stent on the tubing and to expose the portions of the tubing to …
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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 September 29, 1992 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2014.
- 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.