Diphenylamine derivatives
CA 1196655 A · Owner: Nippon Soda Co. Ltd. · Inventors: Okunuki, Susumu; Maeda, Kuniyasu; Yamada, Shozo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title of the Invention Diphenylamine Derivatives, Abstract of the Disclosure Compounds of the general formula, wherein X is trifluoromethyl or halogen R1 is hydrogen, lower alkyl, loweralkenyl or benzyl R2 is lower alkyl, R3 is hydrogen, alkyl or alkali metal Y is oxygen or sulfur, and, n is 0, 1 or 2 ; are useful as herbicides.
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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 November 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2002.
- 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.