Drying apparatus with rotatable housing
CA 2198078 C · Owner: Bigham, David L. · Inventors: Bolton, Danny R.; Bigham, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermal vaporization apparatus includes a cylindrical tube having two ends. A base is provided, with the tube being rotatable with respect to the base. A first drive mechanism applies rotating force to the tube. An auger having two ends extends through the tube, and a second drive mechanism applies rotating force to the auger. At least one gas-fired burner to heat the exterior of the tube while in rotation is provided. A feed mechanism for introducing wet material into the interior of the tube and exterior of the auger within the tube is also provided.
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 21, 1996 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 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.