Adjustable dosage syringe
CA 2421672 C · Owner: Falsey, Thomas A. · Inventors: Falsey, Thomas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a self-zeroing dosage syringe comprising: (a) a syringe barrel which forms a volume efficient to contain a required dosage of a fluid a discharge end at one end of the barrel length a plunger receiving end at , the opposite end of the barrel length (b) said plunger is movably disposed , within the barrel and has a length greater than the length of the barrel and , further has at a set of multiple closely spaced indentations disposed along the length thereof, and (c) a movable dosage selection ring which is disposed around the plunger and rotatable about the longitudinal axis of the plunger; characterized in that the dosage selection ring has (1) a sleeve disposed …
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 24, 2001 and granted January 4, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2023.
- 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.