A syringe for dispensing measured quantities of a medicament
CA 2036940 C · Owner: Silver, Jules · Inventors: Silver, Jules; Tarozzi, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disposable syringe (Figure 2, 10) for dispensing a metered dosage of a material includes a plunger rod (14) which is axially movable within a syringe barrel (12) for dispensing the material. The plunger rod (14) includes a rail section (18) located outside the syringe barrel (12), and a slidable stop member (16) is secured to the rail section (18) for adjusting the volume of material to be dispensed. The adjustable stop member (16) includes a knife edge (62) for embedding into a surface (32) of the rail section of the plunger rod (14) to lock the stop member (16) in a desired position.
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 22, 1991 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 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.