Process for producing d,1-5-methyltetrahy-drofolic acid and its salts
CA 1093554 A · Owner: Bioresearch S.A.S. Del Dr. Livio Camozzi & C. · Inventors: Gennari, Federico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing d,1-5-methyltetrahydrofolic acid and its salts of the formula, (I) where X is hydrogen, an alkaline metal or the equivalent of an alkaline earth metal, by reduction of folic acid with NaBH4 and methylation of tetrahydrofolic acid so obtained with aqueous solutions of formaldehyde and sodium borohydride in an inert gas atmosphere.
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 January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 1998.
- 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.