Benzothiazole and benzothiophene derivatives
CA 1254216 A · Owner: Akzo N.V. · Inventors: Roy, Robert G.; Logan, Robert T.; Mcfadzen, David B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to compounds of the general formula I, wherein, R1 represents one up to and including four the, same or different substituents selected from alkyl(1-6 C), alkoxy(1-6 C), hydroxy, halogen NO2, CF3 or the group -NR5R6, whereby two substituents taken together may also represent a methylene-dioxy group, X represents nitrogen or the group n has the value 0, 1 or 2, R3 represents one of the moieties: the latter meaning of R3 (amide) only under the condition that for X is nitrogen the meaning of R1 is limited to substituents selected from hydroxy alkoxy(l- 6 C) and methylenedioxy, and R4, R5 and R6 represent hydrogen or alkyl(1-6 C) and pharmaceutically acceptable salts …
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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 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
- 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.