Expired Canadian patentCanada
Ammonia-water absorption system with plunger-driven diaphragm solution pump
CA 2452244 C · Owner: Dooley, William T. · Inventors: Dooley, William T.; Rockenfeller, Uwe; Sarkisian, Paul
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ammonia-water absorption system uses plunger driven spring return diaphragm to pump absorption solution.
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 December 4, 2003 and granted February 14, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 4, 2003
GrantedFebruary 14, 2012
Term endedDecember 4, 2023
Patent numberCA 2452244 C
Classification (IPC)F25B15/00 +2 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.