A retractable and destructible safety syringe
CA 2223188 A1 · Owner: Liu, Wen-Neng · Inventors: Liu, Wen-Neng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A retractable and destructible safety syringe including a syringe barrel, a plunger, a needle holder a needle, clicks, formed on the needle holder or the plunger and a one-way movable detent formed on the plunger or the needle holder. When a piston of the plunger is pushed to the bottom the detent can, be easily firmly engaged with the clicks whereby the needle, holder and the needle can be together pulled back into the barrel. In addition, the tip of the needle is pressed against a shoulder section of the barrel and bent and destroyed thereby. A sealing fixing rings are formed on outer wall of the needle holder and inner wall of the needle holder cavity serving to, sealedly and easily …
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 December 29, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2019.
- 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.