Method and apparatus for managing normal pressure hydrocephalus
CA 2480347 C · Owner: Codman & Shurtleff, Inc. · Inventors: Rosenberg, Meir
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adjustable drainage system for regulating cerebrospinal fluid flow in a hydrocephalus , patient where the drainage rate is adjusted in response to ventricular volume variations in the , patient. The system includes an adjustable valve and a volume sensor that can be periodically , energized with an external system controller device by the patient or attending physician to , determine when or if, a change in the ventricular volume has occurred. The system enables the , user to adjust the valve's resistance in response to changes in the ventricular volume using the , controller device so that a target ventricular volume can be achieved. Also provided is a method , of continuously …
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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 3, 2004 and granted May 8, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2026.
- 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
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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.