An interspersion particle comprising an anionic surfactant and a polymeric polycarboxalate
CA 2320252 A1 · Owner: Takemori, Shinya · Inventors: Takemori, Shinya; Mito, Keiichi; Gobayashi, Tatsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an interspersion particle comprising by , weight of the interspersion particle from about 20 % to about 50 % anionic surfactant and from about 15 % to about 30 % polymeric polycarboxylate; wherein the anionic surfactant and the polymeric polycarboxylate are interspersed within the interspersion particle; and wherein the weight ratio of the anionic surfactant to the polymeric polycarboxylate is from about 10:4 to about 10:9. Also disclosed herein are a particle composition and a cleaning composition comprising the interspersion particle and processes for making the interspersion particle.
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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 February 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2020.
- 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
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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.