Solution pumping system with compressible pump cassette
CA 2111119 A1 · Owner: Abrahamson, Kent D. · Inventors: Abrahamson, Kent D.; Wecker, Sheldon M.; Joyce, Thomas P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A solution pumping system includes a compressible pump cassette (14) having front (16) and rear (18) body members and an, elastomeric diaphragm (20) positioned therebetween. The front and rear body members are joined to each other for limited relative, movement, which movement effects compression of diaphragm. The pump cassette is removably positionable in a pump driver of the system which can be configured to effect compression of the cassette for use. In this way, the desired compression of the diaphragm during use can be achieved, while avoiding problems associated with compression set or load decay during storage of the cassette prior to use.
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 December 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2013.
- 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.