Cyclopropane carboxylic acid esters related to pyrethric acid; process for preparing the same and their use for controlling plant and indoor pests; compositions thereof and newintermediates produced

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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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2005.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.