Imidazolin derivatives and a method for producing the same and a therapeutic agent for maintaining blood pressure
CA 2132017 C · Owner: Maeda, Hiroshi · Inventors: Akaike, Takaaki; Maeda, Hiroshi; Miyamoto, Yoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1) The imidazoline derivative represented by the following general formula (1), (see fig. I), where R1 is a substituent endowed with water solubility or fat solubility, particularly carboxyl group or carboxymethoxy group or a pharmaceutically acceptable salt thereof (2) The method for producing the above-mentioned compound and, (3) A therapeutic agent containing as its active ingredient the above-mentioned imidazoline derivative or an imidazoline derivative wherein R1 indicated in the formula (1) is hydrogen atom. The imidazoline derivative set forth under (1) above is a novel substance; and this compound itself and its derivative having R1 as indicated in the general formula (1) is …
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 14, 1993 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 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.