Separator screen and screening method
CA 2236308 C · Owner: Roth, Eldon · Inventors: Roth, Eldon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screen (12) for use in a, separator device (10) includes an inner portion (22) opening onto the, screen inner surface (24) and an outer portion (26) extending the re-, mainder of the way through the screen material. The outer portion, (26) of the screen opening (20) allows the desired material to pass, therethrough while blocking the, entry of large pieces of hard material. The inner portion (22) of, the screen opening (20) includes a deflecting surface (40) forming, an acute deflecting angle (B) with the inner screen surface (24) in the, direction at which a cutting element passes over the screen open-, ing (20). Large pieces of hard material that may partially enter, the screen opening …
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 November 6, 1996 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.