Press-out gun for double chamber cartridges
CA 2000659 A1 · Owner: Maeder, August · Inventors: Maeder, August
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for extruding the stored fluid contents of a cylindrical cartridge having a side wall defining dual chambers separated by a longitudinal partition wall includes a cylindrical tube having a closed end wall and an open end with a bevelled edge. A pair of semicylindrical sleeve pistons are coaxially positioned in spaced parallel relation within the tube with the space between the pistons being coplanar with the partition wall to permit sliding the tube longitudinally along the external periphery of the cartridge. The pistons are each mounted on the closed end wall within the tube and include upstanding free ends which are adapted to engage corresponding slidable semicircular plungers …
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 October 13, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2011.
- 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.