Dual chamber syringe with a dual function piston
CA 2395902 A1 · Owner: Dalmose, Asger, Lau · Inventors: Dalmose, Asger, Lau
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dual chamber syringe in which a dual function piston divides the syringe into two compartments containing powder or fluid in one compartment and fluid in the other. For mixture of the two substances a passage is opened between , the two compartments before or during retraction of the piston to force the substances to be mixed in the front compartment. During forward movement of the piston, the passage between the two compartments is closed to force the mixture of substances through the discharge opening of the syringe.
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 28, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2022.
- 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.