Vacuum auto-retractable safety syringe
CA 2504130 A1 · Owner: Teng, Jun Piao · Inventors: Teng, Jun Piao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A syringe has a hollow body 10, a plunger 20 slidably mounted in the body 10 and a needle 44 mounted at a first end of the body 10. A first sealing member 30, at a first end of the plunger 20 and within the body slidably seals , against the body 10. A second sealing member seals against the body and slidably seals against the plunger shaft 22 the second sealing member 60 , being positioned between the first sealing member 30 and a second opposing , end of the body. Pushing the plunger 20 into the body 10 creates a vacuum between the first and second sealing members 30 60. This can be used to draw , liquid into the syringe for injection. Alternatively the vacuum can be used , to retract …
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 October 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2025.
- 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.