Apparatus for blending particulate material
CA 2001831 C · Owner: Kermit, Paul D. · Inventors: Kermit, Paul D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blending apparatus for particulate material such as plastic pellets which may be assembled from an existing vertically oriented conical bottom silo. The invention includes inserting a inner cone member with a downwardly extending cylindrical member into the inside of the existing conical bottom silo. A vertically oriented lift pipe extends from below this cylindrical member upwardly through the conical insert to the upper reaches of the vessel. An inlet for gaseous fluid under pressure is provided to blending air to the bottom of the vessel for circulating material from the bottom of the vessel up through the lift pipe to the top of the vessel. A seal leg is established between 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 31, 1989 and granted September 24, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2011.
- 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.