Ph sensor
CA 2572168 C · Owner: Stickler, David James · Inventors: Stickler, David James; Waters, Mark Geoffrey John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pH sensor for incorporation into a catheter drainage system at , any position provided that during use it is visible. The pH sensor has a polymer matrix including a chemically bound pH indicator wherein in use , the pH indicator only responds to a sustained increase in pH and produces , a visible signal in response to the increase in pH.
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 June 23, 2005 and granted December 2, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 23, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.