Hypodermic dart
CA 2362809 A1 · Owner: Middleton, David Russell · Inventors: Middleton, David Russell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordNo Claude kit for weapons
Claude doesn't help design weapons, ammunition or explosives, so this page has no Reinvent kit. To develop this one, work with a federally licensed manufacturer (many of these items are regulated) and a registered patent attorney or agent, listed on the USPTO roster.
Abstract From the Canadian patent
A plunger (19) located in the barrel (18) which is in sealing engagment with and movable along the barrel towards or away from the needle and an aperture (23) extending from the barrel rearward of the plunger in its loaded position communicating between the tubular member (10) and an area in the barrel rearward of the plunger, sealing means (21) mounted on the syringe rearward of the aperture and sealingly engaging the tubular member.
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.
Why it's free to use
- Filed February 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2022.
- 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.