Organogermanium compounds, processes for producing the same and agent for inhibiting the activity of opioid peptide-degrading enzyme
CA 2008751 C · Owner: Kakimoto, Norihiro · Inventors: Yoshihara, Toru; Kakimoto, Norihiro
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 (a) novel organogermanium compounds represented by the general formula (1) (see formula 1), (R1 to R6 are independently a hydrogen atom or a lower alkyl group; X is a halogen atom; and Y1 and Y2 are independently a hydroxyl group or a group chemically equivalent thereto) or by the general formula (2), (see formula 2) (R1 to R6 are independently a hydrogen atom or a lower alkyl group, and Z is an oxygen atom or a sulfur atom) (b) processes, for producing the above organogermanium compounds and (c) an, agent for inhibiting the activity of opioid peptide-degrading enzyme, containing the above organogermanium compounds as an active ingredient.
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 29, 1990 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 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.
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.