Method for producing pyrazolo(3,4-b) pyridine ketones
CA 1057758 A · Owner: E.R. Squibb And Sons · Inventors: Denzel, Theodor; Schneider, Hans J.; Hoehn, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new process for the production of pyrazolo- 3,4-bpyridine ketones which are unsubstituted in the 1position comprises reacting a 1-furanylmethylpyrazolo3,4-bpyridine ketone with an inorganic strong mineral acid like sulfuric acid, phosphoric acid or polyphosphoric acid.
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 July 3, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 3, 1996.
- 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.