Griseolic acid derivatives, their preparation and their use
CA 1267409 C · Owner: Kimura, Misako · Inventors: Iijima, Yasuteru; Kaneko, Masakatsu; Yamazaki, Mitsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New griseolic acid derivatives have various groups attache to the sugar part in place of the adenine group of griseolic acid itself. These groups are all purine derivatives or ring-opened purine analogs. The compounds are useful as inhibitors of, phosphodiesterases. They may be prepared by replacing the adenine moiety of griseolic acid and/or dihydrodesoxy griseolic acid and/or by replacing other substituent groups.
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
- Granted April 3, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2007.
- 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.