Salts of biguanides
CA 1053258 A · Owner: Hoffmann-La Roche Limited · Inventors: Lorch, Eckehard; Fischer, Ulf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the manufacture of biguanide salts of the general formula, I, wherein R1 represents a hydrogen atom or a lower alkyl group, R2 represents a lower alkyl or, aryl- (lower alkyl), and n stands for 1 or 2 which process comprises reacting a corresponding biguanide which dichloracetic acid or reacting a biguanide salt of an acid other than dichloroacetic acid with a dichloroacetate.
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 24, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 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.