Multi-valve catheter for improved reliability
CA 2058751 A1 · Owner: Moorehead, H. Robert · Inventors: Moorehead, H. Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel apparatus for a catheter for use in aspirating and/or infusing fluids into a patient. The catheter having, a proximal and and a distal end comprises a plurality of, valves in the walls of the catheter comprised of relatively soft material while maintaining a predetermined degree of structural integrity at the catheter tip. The plurality of valves are radially distributed in offset relation around the distal end of the catheter such that no two valves lie in any one radial plane. Similarly, the plurality of valves are longitudinally separated or offset in their placement at relatively short, but differentiated, distances from the distal end of the catheter such that no two valves lie …
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 3, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 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.