Bleaching composition
CA 1289302 C · Owner: Accardi, Christine · Inventors: Schwarz, Joshua; Accardi, Christine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bleaching composition is disclosed comprising a peroxygen bleaching compound, capable of yielding hydrogen peroxide in an aqueous medium and one or more, bleach precursors wherein the ratio of hydrogen peroxide to precursor ranges from 0.1 to 2. It is also important that bleaching occur in an aqueous medium held at a pH from 8.5 to 9.4. A combination of sodium perborate and sodium benzoyloxybenzene sulphonate is the preferred bleaching composition.
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
- Granted September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
- 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.