Cyclic compounds and their use
CA 2106135 A1 · Owner: Naka, Takehiko · Inventors: Kubo, Keiji; Naka, Takehiko; Inada, Yoshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a compounds represented by the following formula or salts thereof. The above compounds have strong angiotensin II antagonistic action, antihypertensive action and action on central nervous system, which are useful for the treatment of circulatory diseases such as hypertension heart diseases, cerebral apoplexy, nephritis atherosclerosis or Alzheimer's disease and senile dementia, and for agents of improving cerebral function.
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 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2015.
- 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.