Hemihydrate
CA 2033937 C · Owner: Ibrahim, Jutta · Inventors: Ibrahim, Jutta
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a novel crystalline form containing water of , crystallisation, of 4-(5,6,7,8-tetrahydroimidazo1,5-apyridin-5-yl)-benzonitrile hydrochloride of formula Ia, (see formula I), and to a process for the preparation thereof. The novel crystalline form is distinguished by, excellent storage stability.
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 January 10, 1991 and granted March 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2013.
- 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.