Plunger structure for tea maker
CA 2111747 A1 · Owner: Wu, Otto · Inventors: Wu, Otto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tea maker includes a cylindrical container which contains hot water and tea leaves and a plunger which has an elongated rod with a pressing member secured to an end thereof to be inserted into the cylindrical container. The pressing member has a cross-sectional shape corresponding to the cylindrical container to be snugly fit therein and movable and rotatable relative thereto along and about the longitudinal direction of the rod. Water passages are formed on the pressing member to allow water to flow between the top side and the under side thereof. A plurality of sharpen-ended teeth are formed on the under side of the pressing member and depending therefrom to press and squeeze the tea …
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 December 17, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2015.
- 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.