Pyranobenzoxadiazole derivatives
CA 1331990 C · Owner: Masuda, Yukinori · Inventors: Sakoda, Ryozo; Kamikawaji, Yoshimasa; Ohrai, Kazuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compounds of the formula (I), wherein A represents OH or OC(O)CH3-nXn B represents hydrogen, atom, or A and B together represent a bond; R1 represents hydrogen atom, R2 represents hydrogen atom C(Z)CH3-nXn or, C(Z)NHCH3-nXn or R1 and R2 together represents ( CH2)m (CH2)m-1C(Z), N(R3)(CH2)2C(Z), (CH2)m-2NHC(Z) or CH2)m-2OC(Z) in which X represents fluorine atom, chlorine atom bromine atom, a methyl group or a methoxy group and n represents 0 or an integer of 1 to 3, Z represents oxygen atom or sulfur atom m represents, an integer of 4 or 5 and R3 represents hydrogen atom or a methyl group, and pharmacological acceptable salts of the compounds which can form salts, processes therefor and …
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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 September 13, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 13, 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.