Disposable syringe having a retractable needle
CA 2439124 A1 · Owner: Smith, Martin E. · Inventors: Smith, Martin E.; Rippstein, Wayland Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable syringe assembly 10 including a cylinder body 12 a needle , assembly 14, a piston assembly 16 a rear seal assembly 18, a hollow shaft 20 and a valve assembly having a valve port 61 and valve seals 49. The needle assembly may be releasably engaged with the cylinder body. The body and the piston assembly moveable within the body may define each of a fluid chamber 74 and an annular chamber 28. As fluid is drawn into the fluid chamber by movement of the piston assembly, air may be displaced from the annular chamber through the valve assembly. As fluid is discharged from the fluid chamber the , valve assembly may be closed and a vacuum created in the annular chamber. A valve …
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 February 19, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2024.
- 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.