Imidazole derivatives
CA 1092131 A · Owner: May & Baker Limited · Inventors: Gilmour, James; Parnell, Edgar W.; Hatton, Leslie R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New imidazole derivatives of the formula:wherein R1 represents a hydrogen atom or a straight- or branched-chain alkyl group containing from 1 to 4 carbon atoms or a straight- or branched-chain alkenyl or alkynyl group containing from 2 to 4 carbon atoms and R2, R3 and R4, which may be the same or different each represent a hydrogen, or halogen atom or a trifluoromethoxy group or a methyl, ethyl, propyl or isopropyl group optionally substituted by one ? the ????so that R1, R2 R3 and R4 do not all ? hydrogen atoms or more fluorine atoms, or one of the symbols R2 R3 and R4, represents a methoxy group and at least one of the other symbols R2, R3 and R4 represents a halogen atom a trifluoro-, …
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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 December 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 1997.
- 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.