Phenylbenzoylureas
CA 1281741 C · Owner: Novartis Pharmaceuticals Canada Inc./Novartis Pharma Canada Inc. · Inventors: Ehrenfreund, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Phenylbenzoylureas, Abstract of the disclosure The invention relates to novel N-3-halo-4-(hexafluoropropoxy)- 5-trifluoromethylphenyl-N'-benzoylureas of the formula wherein R1 is hydrogen or halogen and R2 and R3 are halogen to a, process and intermediate for the preparation of these compounds and, to compositions containing them for use in pest control in particu-, lar for controlling insects and representatives of the order Acarina that attack plants and animals. The novel compounds exhibit in particular larvicidal activity.
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
- Granted March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
- 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.