Locking syringe
CA 2049067 C · Owner: Foote, Jerrold L. · Inventors: Padilla, William; Foote, Jerrold L.; Lampropolous, Fred P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A syringe (10) and method for use which may be selectively operated between a freely reciprocating position and a restricted position. A triggering means (22) configured with a trigger (50) attached to the plunger (14) of the syringe is employed. The triggering means (72) includes threads (56) located external of the plunger (14) and corresponding threads (38) internal of the barrel (12) of the syringe (10). Upon actuation of the trigger (50) the threads (56) on the plunger (14) are retracted from their position of engagement with the threads (38) on the barrel (12) thereby placing the syringe (10) in position for free sliding movement of the plunger (14) with respect to the barrel (12). In …
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 March 12, 1990 and granted May 19, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2012.
- 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.