Water soluble biodegradable polymeric photocatalysts
CA 2410213 C · Owner: Nowakowska, Maria · Inventors: Nowakowska, Maria; Guillet, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel antenna polymers characterized by a polymeric background of a biodegradable water soluble polymer and chromophores chemically bonded to the polymeric background have been found to be useful as photocatalysts in aqueous media. On completion of the desired photochemical reaction the residual medium can safely be discharged to the natural environment as the catalyst residues undergo biodegradation to form environmentally harmless products.
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 October 30, 2002 and granted March 8, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2024.
- 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.