Amino acid derivatives and pharmaceutical composition comprising, as active ingredients, them
CA 2336162 A1 · Owner: Kato, Masashi · Inventors: Seko, Takuya; Kato, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds represented by general formula (I) and salts thereof wherein each , symbol is as defined in the specification. Because of inhibiting the N type calcium channel, the compounds of general formula (I) are useful as preventives and/or remedies for brain infarction transient ischemic attack, cerebrospinal failure following heart operation spinal vascular failure, stress hypertension neurosis, epilepsy, asthma, frequent urination etc. or , analgesics.
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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
- Filed June 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2021.
- 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.