Manually operated fluid dispensing pump
CA 2244849 C · Owner: Foster, Donald D. · Inventors: Foster, Donald D.; Nelson, Philip L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A manually operated reciprocating fluid pump comprising a pump housing (22) defining a pump chamber (38), a plunger (24) a piston (82) and a priming , valve (92). The plunger (24) extends axially downwardly into the pump chamber (38). The piston (82) is on the plunger (24) and is reciprocally and axially slidable within the pump chamber (38) between a bottom stroke position and a top stroke position. The priming valve (92) is mounted on the plunger (24) radially inwardly of the piston (82) for movement with the plunger (24). A sealing plug (100) is moveable with the plunger (24) and is configured to seat against and seal closed the pump chamber (38) when the piston (82) is in its …
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 31, 1997 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2019.
- 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.