Expired Canadian patentCanada
Nitrosophenols and c-nitrosoanilines as polymerization inhibitors
CA 2476357 C · Owner: Benage, Brigitte · Inventors: Benage, Brigitte
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nitrosophenol compound(s) in combination with air or oxygen and blends , comprising nitrosophenols and nitrosoanilines optionally in combination with , air or oxygen reduce the premature polymerization of ethylenically unsaturated monomers.
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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 January 29, 2003 and granted July 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 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.
FiledJanuary 29, 2003
GrantedJuly 24, 2012
Term endedJanuary 29, 2023
Patent numberCA 2476357 C
Classification (IPC)C07C207/04 +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.