A catheter having a gear-shaped lumen to avert the elimination of fluid flow therein
CA 2194623 A1 · Owner: Becton, Dickinson And Company · Inventors: Chee, Joseph Choon; Antoshkiw, William Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catheter designed for improved patency characteristics under forces normally exerted upon the catheter during use. The catheter features an inner wall having one or more protuberances running lengthwise in a manner parallel with the central axis of the catheter. The protuberances include a tip a root, defined along the inner wall, and a pair of sidewalls extending between the tip and the root. The roots of adjacent protuberances are spaced from one another. A fluid path is established between the inner wall and the opposed sidewalls of adjacent protuberances. The opposed sidewalls can be straight. Alternately at least one of the opposed sidewalls includes a non-linear portionalong its …
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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 January 8, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2019.
- 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.