Brewing apparatus for a coffee machine
CA 2092910 C · Owner: Sintra Holding Ag · Inventors: Von Gunten, Jurg; Zurbuchen, Hans; Lussi, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An infusion device for a coffee machine has an infusion cylinder (1) with a cylindrical chamber (2) and two pistons (3 4). The infusion cylinder (2) and , the pistons (3, 4) are arranged so as to be movable with respect to one another. In an infusion , position, the infusion cylinder (1) and the two pistons (3 4) inside it form , an infusion, chamber (5) for the purpose of infusing ground coffee within it by the introduction of, water under pressure. The latter is taken to the infusion chamber (5) via a connecting, nipple (18) and a through drilling extending through the wall of the infusion cylinder, (1) into a circular slot (14) formed between a sealing ring (11) and the surface …
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 July 28, 1992 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 2014.
- 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.