A process for the production of surfactant granules
CA 2308910 A1 · Owner: Lietzmann, Andreas · Inventors: Lietzmann, Andreas; Assmann, Georg; Sturm, Mario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the production of surfactant granules containing nonionic surfactants in which A) in a first process step, sugar surfactants are processed in the presence of water-soluble carrier materials to form a compound and B) the compounds obtained in A) are mixed with a non-aqueous solvent and the resulting mixture and optionally other detergent ingredients are granulated by methods known per se. The granules produced are readily soluble and show such favorable flow properties that there is no need for a concluding drying step.
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 May 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2022.
- 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.