Coated, granular n-alkylammonium acetonitrile salts and their use as bleach activators
CA 2423607 A1 · Owner: Schonherr, Michael · Inventors: Kingma, Arend Jouke; Kistenmacher, Axel; Schurmann, Gregor
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 granular coated N-alkylammoniumacetonitrile , salts of the formula (I), R2R3NR1-CR4R5-CN+Y- (I), in which R1 is a C1-C24-alkyl group which may be interrupted by nonadjacent oxygen atoms or may additionally carry hydroxyl groups a C4-C24-cycloalkyl group, a C7-C24-alkaryl group or a group of the formula -CR4R5-CN R2 and R3 in each case independently of one another have the meaning of R1 or together, are a saturated four- to nine-membered ring having at least one carbon atom and at least one further heteroatom from the group consisting of oxygen sulfur and nitrogen, R4 and R5 in each case independently of one another are hydrogen a C1-C24-, alkyl group, …
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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 September 28, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2023.
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Timeline
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.