Dosage control for adhesive dispenser
CA 2017770 C · Owner: Paul, Sigismund · Inventors: Ernst, Richard John; Olma, Marian; Paul, Sigismund
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatically actuatable dispenser for a two-part adhesive, as provided in a cartridge having two chambers and having a mixing nozzle mounted to a first end, each chamber having a plunger accessible from a second end. A front frame holds the cartridge. A piston is arranged to be selectively driven within a cylinder in a forward or reverse direction. A pair of piston rods operate in tandem to drive the plungers toward the nozzle when driven, conjointly with the piston in the forward direction. A first valve when actuated, delivers pressurized, air driving the piston in the forward direction. A second valve, when actuated, delivers pressurized air driving the piston oppositely. A third …
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 May 29, 1990 and granted December 3, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 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.