4-aminopyridine derivatives and their acid addition salts
CA 1320310 C · Owner: Nitta, Issei · Inventors: Tobe, Akihiro; Morita, Shuji; Ninomiya, Kunihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel 4-aminopyridine derivatives represented by the general formula (I):, (I), wherein A and B independently represent or , ;, and n is an integer of 0 or 1; as well as their pharmaceutically acceptable acid addition salts are disclosed herein, The novel compounds are useful as the agent for improving the impaired brain function.
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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 July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
- 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.