Expired Canadian patentCanada
Novel pairs of working substances for absorption heat pumps, absorption refrigeration machines and heat transformers
CA 2564474 C · Owner: Schubert, Thomas · Inventors: Boesmann, Andreas; Schubert, Thomas
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a pair of substances containing a working substance and an ionic liquid, to the use of said substances in absorption heat pumps absorption refrigeration machines and heat transformers and to corresponding devices.
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 May 23, 2005 and granted May 7, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 23, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 23, 2005
GrantedMay 7, 2013
Term endedMay 23, 2025
Patent numberCA 2564474 C
Classification (IPC)C09K5/08 +1 more
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.