Syringe construction
CA 2015142 C · Owner: Debiotech S.A. · Inventors: Pfleger, Frederick W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A syringe for hypodermic injection wherein multiple pistons seal various number of chambers. One piston provides the basic operating force to dispel the contents from a chamber or successive chambers. Another piston or other pistons form one or more additional chambers. The plurality of pistons permit release of the chamber contents or successive chamber contents. A syringe holder is provided for holding using and, disposing of the syringe minimizing potential of accidental sticking by the needle 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 April 23, 1990 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2012.
- 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.