Nitrogen-containing heterocyclic compounds, and their production and use
CA 1231945 A · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Matsuo, Noritada; Hatakoshi, Makoto; Nishida, Sumio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nitrogen containing heterocyclic compound of the formula:, wherein, R1 is either one of the following groups: , or , (in which R7, R8, R9, R10, R11, R12 R13, R14, R15, R16 and, R17 are, the same or different each a hydrogen atom, a, halogen atom, a C1-C4 alkyl group a C1-C4 alkoxy group, a, C1-C4 alkylthio group a trifluoromethyl group or a nitro, group R18, R19, R20 and R21 are, the same or different each a hydrogen atom or a methyl group k is an integer of 0, to 1 and ? is an integer of 0 to 3); - 82 -, R2 and R3 are, the same or different each a hydrogen, atom, a halogen atom or a methyl group; R4 is a halogen atom or a methyl group; R5 and R6 are, the same or different, each a …
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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 January 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 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.
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.