Cyclohexane derivatives
CA 2131749 A1 · Owner: Ogawa, Toshiaki · Inventors: Katayama, Satoshi; Ozaki, Fumihiro; Hasegawa, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To provide a novel cyclohexane derivative a, cyclohexane derivative is defined by the formula (I) or a pharmacologically acceptable salt thereof: (I), (wherein R1 and R2 may be the same or different from each other and each represents hydrogen or lower alkyl; R3 represents optionally substituted aryl or optionally substituted heteroaryl; X represents oxygen or sulfur; and Y represents a group represented by the formula:, or the like). The compound of the present invention is useful as a preventive and therapeutic agent for diseases against which a potassium channel opening action is efficacious. - 171 -
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
- Filed September 9, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2016.
- 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.