Method and means for providing refrigeration
CA 2071792 C · Owner: Parker, Giles William · Inventors: Verster, Daniel Martin; Parker, Giles William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of providing a container for goods with a refrigeration facility, which method includes placing in gaseous communication with the interior of the container a holder for holding carbon dioxide snow which holder or, a continuous wall region thereof constituting at least about 15% of the total wall area of the holder is of a, flexible material that is at least substantially impermeable to the carbon dioxide snow and permeable to gaseous carbon dioxide.
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 June 22, 1992 and granted March 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 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.