Safety syringe with retractable needle
CA 2093227 C · Owner: Jentzen, S. William · Inventors: Mcgary, R. Kern; Jentzen, S. William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved safety syringe (10) with retractable needle (30) is provided which allows retraction of the needle (30) into a hollow plunger (18) by additional forward pressure on the plunger (18) after the fluid is driven from the syringe (10). The present invention contemplates an improved syringe device with retractable needle (30) and a method of delivering fluid to a patient and retracting the needle (30) within the syringe (10) after the fluid is delivered. The syringe (10) preferably includes a hollow plunger (18) inserted into one end (16) of a cylindrical barrel (12) and a hollow needle (30) attached to the other end (14) of the barrel (12). Biasing means is attached to the …
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 September 27, 1991 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2013.
- 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.