Thiadiazole dioxide derived oxaziridines as bleaching compounds
CA 2273492 A1 · Owner: Unilever Plc · Inventors: Coope, Janet Lynn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel bleaches, a method for bleaching substrates using these materials and detergent compositions containing same are reported. The bleaches are thiadiazole dioxide derived mono- and di-oxaziridines. Substrates such as fabrics may be bleached in an aqueous solution containing the oxaziridine.
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 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2019.
- 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.