Cardiac valve prosthesis
CA 1301409 C · Owner: B. Braun Melsungen Ag · Inventors: Rau, Gunter; Reul, Helmut; Knoch, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cardiac Valve Prosthesis, It is a disadvantage of the known biscuspid valve prostheses that, in completely open position the flow, separates either at the leading edge of the closing body or within the range of a nozzle confined by the closing body surfaces. The resultant jet randomly reattaches again to one of the closing bodies while, behind the other closing body, an extensive wake-flow is formed together with strongly fluctuating vortices. Said condition may change with each beating cycle. The opening behaviour of both closing bodies becomes unequal due to the different pressure distribution. As a result, extensive deadwater areas and damage of the blood may be observed. Said …
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
- Granted May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
- 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.