Naphthindazole-4,9-quinones and use thereof for controlling undesirable plant growth
CA 1331384 C · Owner: Ditrich, Klaus · Inventors: Westphalen, Karl-Otto; Meyer, Norbert; Wuerzer, Bruno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Naphthindazole-4,9-quinones of the formula (I), where:, R1 is C2-C10-alkyl, C3-C10-alkenyl C2-C10-alkynyl, C1-C10-halo-, alkyl, C1-C10-hydroxyalkyl C2-C14-alkoxyalkyl, C2-C14-alkyl-, thioalkyl C3-C7-cycloalkyl, C1-C4-alkylcarbonyloxy-C1-C4-alkyl C1-C4-alkylaminocarbonyloxy-C1-C4-alkyl phenylaminocarbonyloxy-, C1-C4-alkyl which is unsubstituted or substituted in the phenyl moiety by halogen, C1-C4-alkyl or C1-C4-alkoxy phenylsulfonyl-, oxy-C1-C4-alkyl which is unsubstituted or substituted in the phenyl moiety by halogen, C1-C4-alkyl or C1-C4-alkoxy C1-C4-alkoxycarbonyl-C1-C4-alkyl, hydroxycarbonyl-C1-C4-alkyl aminocarbonyl-C1-C4-alkyl, C1-C4-alkylaminocarbonyl-C1-C4-alkyl …
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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 August 9, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 9, 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.
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.