Process and apparatus for cryogenically cleaning residue from containers and intermediate bulk containers designed for cryogenic cleaning
CA 2197370 A1 · Owner: Dean, James · Inventors: Popp, Carolyn; Clark, Bob; Dean, James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for the cleaning of residue from the surface of a container where the method comprises cooling the container and residue adhered to the container surface to a low temperature substantially embrittling the residue, fragmenting the residue, separating the residue from the surface of the container and removing the residue from the container. The container is placed in an enclosure with an opening in the top of the enclosure to permit access to the interior of the container when a container lid is removed. The system includes a rotating base to turn the container to facilitate freezing and removal of the residue. Further, there is a commodity container adapted for …
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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 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2019.
- 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.