Needleless injector
CA 2116341 C · Owner: Weston Medical Limited · Inventors: Weston, Terence Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A needleless injector comprises a liquid metering chamber (31 131) having an , outlet orifice (21, 121) a piston (7, 107) , slidable within the metering chamber and a rod (6, 106) which is arranged to strike one end of the piston to force liquid through the outlet orifice. The injector is in two parts (1 2; 101, 102) which are , biassed away from one another and the front one of which, carries the outlet orifice. Actuation only occurs when one part is sufficiently urged towards the other by the user.
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 August 21, 1992 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 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.