A piston diaphragm pump for the delivery of liquids in doses
CA 2118799 C · Owner: Lang Apparatebau Gesellschaft Mit Beschraenkter Haftung · Inventors: Klein, Joachim; Hunklinger, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A piston diaphragm pump for delivering doses of liquids in, particular surfactants, wetting agents or the like has a pump, piston movably guided in a pump tube that encloses the pump pressure chamber, and can be electromagnetically driven against the force of a return spring by a magnetic coil that surrounds the pump tube. In addition, a pump diaphragm that is peripherically clamped to the pump housing and faces on one side the pump suction chamber, is rigidly connected on the suction side to the pump piston. A longitudinal bore within which is, arranged a pump piston provided with a piston valve extends, centrally through the pump diaphragm and links the pressure chamber to the suction …
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 September 3, 1992 and granted December 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2014.
- 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.