Drying apparatus
CA 2079263 C · Owner: Kanai, Masao · Inventors: Kanai, Masao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drying apparatus for removing moisture content from a substance to be dried, comprises peripheral wall means defining a working space for drying the substance the, peripheral wall means defining at least an inlet for charging the substance to be dried, an outlet for taking the dried substance therefrom and a drain, rotary spiral blade assembly disposed within the working space and having lower end, at which the substance accumulated on the bottom of the working space rides on a transporting surface of the rotary spiral blade assembly, the rotary spiral blade assembly being rotatable at a predetermined rotation speed sufficient for forcing the substance on the transporting surface to climb …
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 September 28, 1992 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2014.
- 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.