Expired Canadian patentCanada
3- and 3,8-substituted 1,10-phenanthrolines and their use in electron and energy transfer processes
CA 2252813 C · Owner: Tzalis, Dimitrios · Inventors: Tzalis, Dimitrios; Tor, Yitzhak
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 1,10-phenanthroline derivatives substituted at the 3- 8-positions and their use in electron and energy transfer processes.
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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 April 29, 1997 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 29, 1997
GrantedJanuary 7, 2003
Term endedApril 29, 2017
Patent numberCA 2252813 C
Classification (IPC)C07D471/04 +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.