Device for expelling a liquid or pasty substance
CA 2531325 C · Owner: Volckmann, Jean-Claude · Inventors: Volckmann, Jean-Claude; Rosset, Yannick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device (1) for expelling a liquid or pasty substance including a body (2), a portion suitable for containing said substance and provided with a substance discharge port a push cylinder (3) provided with teeth (10) and movably mounted in a bore (23) extending through the body for varying the volume of the portion suitable for containing said substance and a mechanism connected to the body for moving the push cylinder. The device further includes a hinged lever (4) engaging the push cylinder teeth via a hinged pawl (16) provided on the lever (4) and biased into a position in which it engages the push cylinder and a non-return pawl (18) biased into a position in which it engages the push …
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 July 15, 2004 and granted December 3, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 2026.
- 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.