Appliance for rapid cooling and freezing
CA 2090607 C · Owner: Rocky Research · Inventors: Rockenfeller, Uwe; Kirol, Lance D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus capable of rapidly cooling or freezing a composition comprising a walled housing member (10) having a cooling chamber (20) and a door for accessing the cooling chamber from the exterior of the housing, an evaporator (40) and a blower (42) for circulating cold air from the evaporator to the cooling chamber, first (22) and second (24) reactors each containing a complex compound consisting of a metal salt and ammonia adsorbed thereon, heaters (21, 23) in the reactors for heating the complex compound, and valves (28, 29, 31 32) and conduits for, directing ammonia from the evaporator to the reactors from the, reactors to the condenser (30) and from the condenser to the eva-, porator …
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 November 6, 1991 and granted March 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2013.
- 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.