Automatic injection syringe
CA 1183420 A · Owner: Duphar International Research B.V. · Inventors: Kamstra, Paulus R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an automatic syringe for injecting two or more different injection liquids which may not be in contact with each other for longer periods of time. For that purpose the ampoule between piston and needle connection comprises one or more stoppers which keep the injection liquids separated from each other while at a short, distance before the needle connection a by pass means is present past which the injection liquid or injection liquids present behind the stopper or stoppers can pass the stopper or stoppers during use 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
- Granted March 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2002.
- 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.