Expired Canadian patentCanada
Removal of thiamine monophosphate from a solution of thiamine phosphates
CA 2012927 C · Owner: Schul, Wolfgang · Inventors: Dobler, Walter; Mitschker, Alfred; Schul, Wolfgang
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thiamine monophosphate is~, separated from a solution of thiamine phosphates containing thiamine monophosphate and cocarboxylase and having a pH of 2-7 by using a cation exchanger resin having a pK a of 1.0-4.5.
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 March 23, 1990 and granted August 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 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.
FiledMarch 23, 1990
GrantedAugust 29, 2000
Term endedMarch 23, 2010
Patent numberCA 2012927 C
Classification (IPC)C07F9/65 +1 more
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.