Method of detecting occlusions in a solution pumping system
CA 2114346 A1 · Owner: Ogden, John E. · Inventors: Ogden, John E.; Wynkoop, Richard D.; Wecker, Sheldon M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of detecting occlusions in a solution pumping system includes monitoring and analyzing pressures within the system during selected portions of a pumping cycle. The pumping system of the illustrated embodiment includes a positive displacement pump operated by a reciprocable pump piston with analysis of, pressures within the system identifying those conditions which reflect the presence of an occlusion either upstream or downstream of the positive displacement pump. A suitable signal or alarm can then be activated to alert operating personnel.
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 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 2016.
- 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.