Expired Canadian patentCanada
Pyridine-3-peroxycarboxylic acid monopersulfate
CA 2005185 C · Owner: Venturello, Carlo · Inventors: Venturello, Carlo; Cavallotti, Claudio
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pyridine-3-peroxycarboxylic acid monopersulfate of the formula:, (I), its preparation and its use as a bleaching agent are disclosed.
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 11, 1989 and granted November 26, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2011.
- 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 11, 1989
GrantedNovember 26, 1996
Term endedDecember 11, 2009
Patent numberCA 2005185 C
Classification (IPC)C07D213/80 +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.