Prostaglandin i analogue
CA 2016300 C · Owner: Oda, Tomio · Inventors: Ueno, Ryuji; Oda, Tomio; Ueno, Ryuzo
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 new prostaglandin I analogous compounds represented by the following formula (I) and (II). (see formula I), (see formula II) wherein R1 is a hydrogen atom or alkyl group at least one of, R2 and/or R2' is a halogen atom an alkyl group, a group, containing an aromatic group a hydroxyl group or an alkoxy, group provided that R2 and R2' are not simultaneously hydrogen atoms or a salt thereof. The compounds of the present invention are suitable for use as hypotensives.
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 May 8, 1990 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2012.
- 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.