Kneader for paper stuff
CA 2196202 C · Owner: Dal Maso, Giancarlo · Inventors: Dal Maso, Giancarlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention discloses a kneader for the preparation of paper stuff comprising: a substantially cylindric tank (2; 120) having on the internal wall vertical ribs (21) able to interrupt the rotation of the stuff stream; a rotor (13; 130) having a vertical axis (X; Y) located inside said tank (2; 120) and provided with blades (32; 132) spiral shaped. The external edge of each said blade presents a holding wing (34; 134) which is continuous and oriented towards the bottom of the tank and said wing develops itself from the beginning of each blade, starting from the rotor part farthest from the bottom, ending almost at one turn before the end of the spiral on the bottom.
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 June 4, 1996 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2018.
- 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.