Screening machine
CA 2126375 C · Owner: Kabushiki Kaisha Miike Tekkosho · Inventors: Kobayashi, Yoshikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screening machine comprising a plurality of rotors adapted such that in a frame the axes of the rotors are arranged parallel to one another from a supply side where objects to be screened including mixed substances different at least in size are supplied from above by a conveying means to a discharge side where the remainders after screening are discharged, and such that the rotors are rotated in the same direction by a rotating drive means, each rotor further comprises at least two kinds of components, namely, a plurality of large diameter sections and a plurality of small diameter sections alternately disposed in the axial direction of each rotor and arranged in a staggered relation in …
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 21, 1994 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2016.
- 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.