Rotary apparatus
CA 2122452 C · Owner: Takara, Muneaki · Inventors: Takara, Muneaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A completely novel rotary apparatus is provided which can rotate a composite rotor at a high speed by utilizing the magnetic force, the composite rotor being comprised of a plurality of ring-shaped rotors arranged concentrically with each other. The rotary apparatus has the feature that a central rotor is centrally arranged so as to be rotatable; a plurality of ring-shaped rotors are arranged concentrically with said central rotor in a relationship spaced apart from each other so as to be rotatable coaxially with said central rotor about its rotational axis; a group of magnetic poles are disposed on a surface of each rotor on the side facing a surface of the adjacent rotor; a group of the …
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 28, 1992 and granted February 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 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.