N-phenyltetrahydrophthalimides and their use as herbicides
CA 1332947 C · Owner: Basf Aktiengesellschaft · Inventors: Eicken, Karl; Wuerzer, Bruno; Schwalge, Barbara
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
N-Phenyltetrahydrophthalimides of the general formula I, where R1 is hydrogen or halogen R2 is halogen, R3 is hydrogen or, C1-C4-alkyl R4 is unsubstituted or C1-C3-alkoxy-substituted C1-C8-alkyl C3-C4-alkenyl or C3-C4-alkynyl, and R5 is hydrogen or C1-C4-alkyl methods, for their manufacture, and their use as herbicides.
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 November 8, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 8, 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.