Method for purifying linuron
CA 1340936 C · Owner: Marzorati, Carlo · Inventors: Marinelli, Gian Piero; Marzorati, Carlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to remove traces of impurities constituted by tetrachloroazobenzene, tetrachloroazoxybenzene polychlorinated diphenyl compounds and the like from crude linuron, the crude linuron is subjected to a single purification. treatment by dissolution in a hot organic solvent and subsequent crystallisation by cooling and recovery of the precipitated linuron. Preferred solvents are aromatic solvents preferably, chlorinated. The treatment enables the impurity content to be reduced to values less than 1 ppm.
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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
- Granted March 28, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 28, 2017.
- 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.