Process for the preparation of mixed 2,2'-oxydisuccinate/carboxymethyloxysuccinate
CA 2031280 A1 · Owner: Lamberti, Vincent · Inventors: Gutierrez, Eddie N.; Lamberti, Vincent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of mixed salts of oxydisuccinate/carboxymethyloxysuccinate is disclosed which process comprises adding glycolic acid to an aqueous mixture obtained from a 2,2'-oxydisuccinate forming reaction. The mixed oxydisuccinate/, carboxymethyloxysuccinate salts are obtained in high yields and can be used as detergent builder in cleaning compositions.
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 November 30, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 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.
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.