Injection device
CA 2082159 C · Owner: Hjertman, Birger · Inventors: Hjertman, Birger; Levander, Gustav; Ljungquist, Olle
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for injection from an injection cartridge (1) of a conventional type comprises a front sleeve (5) which holds the cartridge, a rear sleeve (10) which can be screwed .into the front sleeve (5), and a piston rod (16), which is connected to the piston (3) of the cartridge and which can be actuated to expel an injectable preparation (4) from the cartridge (1). When the rear sleeve (10) is screwed into the front sleeve (5) indicia, (18) at the rear end of the piston rod (16) will become visible through a window (15) arranged in a tubular extension (14) at the rear end of the rear sleeve (10) such that the dose to be injected is displayed. In each injection, the reading of the dose is …
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 1, 1992 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 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.