Fabricated steel lifter for rotary kiln
CA 2315774 C · Owner: Conocophillips Company · Inventors: Doerksen, Brian J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fabricated steel lifter (10) for enhancing mixing of particulate material in a rotary calcining kiln. The lifter (10) is fabricated from a weldable heat resistant alloy and includes a base plate (12) an anchor post (20), a sole , plate (24) a face plate (32) attached to the sole plate (24) and extending back over the anchor post (20), and supporting gussets (34 36) between the , sole plate (24) and the face plate (32).
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 February 1, 1999 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2021.
- 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.