Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof
CA 2117206 A1 · Owner: Popp, Carolyn · Inventors: Popp, James L.; Popp, Carolyn
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 a container and residue adhered to the container surface to a low temperature substantially embrittling the residue and then impacting the container to fragment and separate the residue from the surface of the container. The cooling may be effected by contacting cold vaporized cryogen to the residue and container in an insulated box having a cryogen sprayer, an opening, and a door. A method for reducing the bulk volumes of containers comprising cooling the container to a low temperature to substantially embrittle the container and then stressing the container to fracture and …
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 March 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2016.
- 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.